CN114791418A - Method for quickly inspecting and disposing construction quality defects of adhesive for structural reinforcement - Google Patents
Method for quickly inspecting and disposing construction quality defects of adhesive for structural reinforcement Download PDFInfo
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- CN114791418A CN114791418A CN202210594543.5A CN202210594543A CN114791418A CN 114791418 A CN114791418 A CN 114791418A CN 202210594543 A CN202210594543 A CN 202210594543A CN 114791418 A CN114791418 A CN 114791418A
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- 239000000853 adhesive Substances 0.000 title claims abstract description 149
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 61
- 230000002787 reinforcement Effects 0.000 title claims abstract description 37
- 230000007547 defect Effects 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims description 116
- 238000005452 bending Methods 0.000 claims description 75
- 239000000463 material Substances 0.000 claims description 61
- 239000000047 product Substances 0.000 claims description 59
- 230000009477 glass transition Effects 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 21
- 238000004566 IR spectroscopy Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000011056 performance test Methods 0.000 claims description 12
- 238000010125 resin casting Methods 0.000 claims description 12
- 230000004075 alteration Effects 0.000 claims description 11
- 239000003086 colorant Substances 0.000 claims description 10
- 125000000524 functional group Chemical group 0.000 claims description 9
- 238000002329 infrared spectrum Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000012921 fluorescence analysis Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000012779 reinforcing material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
- G01N2021/3572—Preparation of samples, e.g. salt matrices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Immunology (AREA)
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to a method for quickly detecting and disposing construction quality defects of an adhesive for structural reinforcement, and belongs to the technical field of building structural adhesive performance detection. The method comprises the steps of rapidly inspecting and disposing the three phenomena of glue non-curing, glue curing insufficiency and color difference after glue curing. The method can quickly detect and evaluate typical defects appearing in the adhesive curing process in the reinforcement engineering construction process, and makes corresponding treatment according to the result, thereby providing a quick solution for related problems appearing in the construction site.
Description
Technical Field
The invention relates to a method for quickly detecting and disposing construction quality defects of an adhesive for structural reinforcement, and belongs to the technical field of building structural adhesive performance detection.
Background
In the structural reinforcement project, the adhesive for reinforcement is an important bonding material, and the existing acceptance method is based on that after the adhesive is fully cured, the bonding strength and the plumpness of the construction part are checked according to the construction quality acceptance standard GB 50550-2010 of the construction quality of the building structural reinforcement project. However, the reinforcing adhesive after construction in actual engineering often has the phenomenon of no curing or insufficient curing, and the existing specifications cannot quickly evaluate the applicability and safety of the reinforcing adhesive. The method is a rapid inspection and disposal method which is formulated aiming at the construction quality defect of the adhesive for the structural engineering reinforcement, the adhesive for the reinforcement covers the adhesive types specified in the existing building identification and reinforcement general Specification GB 55021 + 2021 and the engineering structural reinforcement material safety identification technical Specification GB 50728-2011, and the method mainly comprises the following steps: the adhesive for bonding steel reinforcement, the adhesive for pouring steel reinforcement, the adhesive for adhering fiber composite materials, the adhesive for planting bar anchoring, the adhesive for repairing cracks and the like. In the construction process of the reinforcement project, the adhesive for reinforcement is required to enter a factory once according to the requirement of 'construction quality acceptance standard for the reinforcement project of building structures' GB 50550-2010, and construction can be carried out after rechecking. However, engineering accidents still occur in the construction process, and the defects of typical construction quality of the adhesive for reinforcement are mainly divided into glue non-curing, glue curing insufficiency, color difference after curing and the like. In addition, in the construction quality acceptance specification for building structure reinforcing engineering GB 50550-2010, the quality of the reinforced adhesive after construction is inspected, the filling fullness and the bonding strength are mainly inspected, and an effective method is lacked in the prior art for typical defects caused by insufficient curing of the adhesive.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for quickly inspecting and disposing the construction quality defects of an adhesive for structure reinforcement, which is used for solving the problems of quick inspection and treatment in the prior art that the adhesive is not cured, the adhesive is not fully cured, the color after curing is different and the like.
In order to solve the problems, the invention adopts the following technical scheme:
the method for quickly inspecting and disposing the construction quality defects of the adhesive for structural reinforcement comprises the steps of quickly inspecting and disposing three phenomena of glue non-curing, glue curing insufficiency and color difference after glue curing, and inspecting and disposing the three phenomena respectively according to the following steps:
(1) phenomenon of glue not curing
Aiming at the phenomenon that the structural adhesive is not cured in engineering, the adhesive is mainly in a flowing state after construction, and the following inspection and treatment can be carried out:
step 1.1: examination of
Taking the flowing glue solution and an adhesive product which is not constructed to form two samples, and respectively analyzing the compositions of the two samples by adopting an observation method, an infrared spectroscopy method and an X fluorescence analysis method;
wherein, the observation method mainly judges whether the appearance colors of the two samples are consistent;
if the colors are consistent, the positions of the characteristic peaks of the molecular functional groups in the infrared spectrogram obtained by combining the infrared spectroscopy are required to further judge whether the chemical compositions of the two samples are consistent;
if the colors are not consistent, an X fluorescence analysis method is combined to analyze the two sample elements; simultaneously, the consistency of the compositions of the two sample materials is analyzed by combining an infrared spectrogram; if the materials are consistent in composition, the reinforced adhesive material for field construction has no problem, and the reinforced adhesive material can be judged to be not mixed according to the mixture ratio of a product specification during construction or metal elements are mixed into the adhesive solution at the bonding part of the reinforced adhesive material and the adhesive; if the material compositions are not consistent, the adhesive product during construction is inconsistent with the product entering the factory;
step 2.2: disposal of
Materials and parts of obvious flowing parts need to be dismantled, wherein a drilling method is adopted for hidden engineering to distinguish whether glue flows or not in advance, and then all components of the adhesive product for reinforcement are mixed correctly and fully according to the proportion required by a specification and then construction is carried out;
(2) for the phenomenon of insufficient glue curing
Aiming at the phenomenon of insufficient curing of the structural adhesive in engineering, the curing is mainly shown in that although the adhesive material after construction is solidified, the overall hardness is not high, and the following treatment can be carried out:
step 2.1: examination of
Taking out the solidified adhesive material in a block shape from a construction site in a micro-damage mode, and simultaneously taking out an adhesive product which is not constructed;
mixing the components of the adhesive product which is not constructed according to the proportion of the product specification, preparing a bending test piece according to GB/T2567 plus 2008 of resin casting body performance test method, quickly curing the test piece, and testing the bending strength P1; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectroscopy test, and the glass transition temperature T1 of the test piece is measured by adopting a differential scanning method;
2 groups of bending test pieces with the size meeting the requirements of resin casting body performance test method GB/T2567-2008 are prepared from the adhesive material obtained on the construction site, and the bending strength of the 1 st group of test pieces is directly tested to obtain the bending strength P2; heating the 2 nd group of test pieces, airing to normal temperature, and testing the bending strength of the test pieces to obtain the bending strength P3; testing by adopting an infrared spectroscopy to obtain infrared spectrograms of the 2 groups of test pieces; testing the glass transition temperature Tg of the 2 groups of samples by adopting a differential scanning method, thereby obtaining the glass transition temperature T2 of the 1 st group of unheated test pieces and the glass transition temperature T3 of the 2 nd group of test pieces after heating treatment;
step 2.2: disposal of
Comparing 3 groups of test piece infrared spectrograms, if the difference of characteristic peaks of typical functional groups is large, the test piece is lack of consistency, and the test piece needs to be dismantled due to the fact that labor is stolen and materials are reduced; on the contrary, the consistency of the test piece composition is shown;
secondly, on the premise that the infrared spectrograms of the 3 groups of test pieces are consistent, the bending strength of the 3 groups of test pieces is compared, and whether the part which is not cured sufficiently is dismounted or reserved is determined;
(3) the phenomenon that the color of the glue after curing is different
Aiming at the problems that the structural adhesive in engineering is solidified, but has obvious color difference and is worried about insufficient strength, the following treatment can be carried out:
step 3.1: examination of
Taking out the cured adhesive material with obvious color difference from the construction site in a micro-damage mode, and simultaneously taking out the adhesive product which is not constructed;
preparing a bending test piece by using the adhesive material with obvious chromatic aberration obtained on a construction site according to the resin casting body performance test method GB/T2567-2008, testing the bending strength of the bending test piece, and testing the infrared spectrogram of the test piece; mixing the components of the adhesive product which is not constructed according to the proportion of the product specification, preparing a bending test piece according to GB/T2567 plus 2008 of resin casting body performance test method, quickly curing the test piece, and testing the bending strength P1; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectrum method;
step 3.2: treatment of
Comparing infrared spectrograms of a cured adhesive material with an adhesive product test piece which is not constructed with obvious chromatic aberration, and if the difference of characteristic peaks of typical functional groups is large, indicating that the cured adhesive material is lack of consistency with the adhesive product test piece which is not constructed, and the cured adhesive material and the adhesive product test piece which is not constructed with the obvious chromatic aberration are removed due to the fact that labor is stolen and the material is reduced;
secondly, on the premise of consistent infrared spectrograms, the chromatic aberration can be judged to be caused by construction reasons; if the bending strength of the on-site cured adhesive material test piece is less than the technical index requirement specified by the product standard, removing the test piece; if the bending strength meets the standard index requirement of the product, the bending strength is reserved.
Furthermore, in the step 2.2, a specific method for determining whether to dismantle or retain the insufficiently cured part is as follows;
if the bending strength P2 and the bending strength P3 are both smaller than the bending strength P1 and are both smaller than the technical index requirements specified by product standards, removing the insufficiently cured part;
if the bending strength P2 is less than the bending strength P1, but the bending strength P3 is close to the bending strength P1 and meets the technical index requirements specified by the product standard, the glass transition temperature T3 and the glass transition temperature T1 need to be further compared; if the glass transition temperature T3 is less than the glass transition temperature T1, this indicates that the insufficiently cured adhesive material is not sufficiently heat resistant and should be removed from the insufficiently cured part; if the glass transition temperature T3 corresponds to the glass transition temperature T1, then the insufficiently cured portions may remain.
Further, in the step 2.1, the bending test piece obtained by mixing the components of the adhesive product which is not constructed according to the proportion of the product specification and the bending test piece prepared by mixing the components of the adhesive product which is not constructed according to the proportion of the product specification in the step 3.1 are rapidly cured by heating at 60 ℃ for 24 hours; and in the step 2.1, the 2 nd group of bending test pieces prepared by the adhesive material obtained on the construction site are quickly cured by heating at 60 ℃ for 4 hours.
Further, the adhesive for reinforcing the structure comprises adhesive types specified in the general Specification for building identification and reinforcement GB 55021-2021 and the technical Specification for safety identification of engineering structural reinforcing materials GB 50728-2011.
Further, the adhesive for structure reinforcement comprises an adhesive for bonded steel reinforcement, an adhesive for cast steel reinforcement, an adhesive for fiber composite material adhesion, an adhesive for embedded steel anchoring or an adhesive for crack repair.
Compared with the prior art, the invention achieves the following technical effects:
the method can quickly detect and evaluate typical defects appearing in the adhesive curing process in the reinforcement engineering construction process, and makes corresponding treatment according to the result, thereby providing a quick solution for related problems appearing in the construction site.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
In the embodiment, the adhesive for repairing the crack specified in the general Specification for existing building identification and reinforcement GB 55021-2021 and the technical Specification for safety identification of engineering structural reinforcement GB 50728-2011 is used for example.
The construction quality defect rapid inspection and treatment method of the adhesive for repairing the structure reinforcement and the crack comprises three phenomena of glue non-curing, glue curing insufficiency and difference of colors after glue curing, and the inspection and the treatment are respectively carried out according to the following steps:
(1) no solidification of glue
Aiming at the phenomenon that the structural adhesive is not cured in engineering, the adhesive is mainly in a flowing state after construction, and the following inspection and treatment can be carried out:
step 1.1: examination of
Taking the flowing glue solution and an adhesive product which is not constructed to form two samples, and respectively analyzing the compositions of the two samples by adopting an observation method, an infrared spectroscopy method and an X fluorescence analysis method;
wherein, the observation method mainly judges whether the appearance colors of the two samples are consistent;
if the colors are consistent, the positions of characteristic peaks of molecular functional groups in an infrared spectrogram obtained by combining an infrared spectroscopy are required to be further judged whether the chemical compositions of the two samples are consistent;
if the colors are not consistent, an X fluorescence analysis method is combined to analyze the two sample elements; simultaneously, the consistency of the compositions of the two sample materials is analyzed by combining the infrared spectrogram; if the materials are consistent in composition, the reinforced adhesive material for field construction has no problem, and the reinforced adhesive material can be judged to be not mixed according to the mixture ratio of a product specification during construction or metal elements are mixed into the adhesive solution at the bonding part of the reinforced adhesive material and the adhesive; if the material composition is inconsistent, the adhesive product during construction is inconsistent with the product entering the factory;
step 2.2: treatment of
Materials and parts of the obvious flowing parts need to be dismantled, wherein, for concealed engineering, a drilling method is adopted to distinguish whether the adhesive flowing condition exists in advance, and then all components of the adhesive product for reinforcement are mixed correctly and fully according to the proportion required by the specification and then are constructed;
(2) for the phenomenon of insufficient glue curing
Aiming at the phenomenon of insufficient curing of the structural adhesive in engineering, the curing is mainly shown in that although the adhesive material after construction is solidified, the overall hardness is not high, and the following treatment can be carried out:
step 2.1: examination of
Taking out the blocky cured adhesive material from a construction site in a micro-damage mode, and simultaneously taking out the adhesive product which is not constructed;
mixing the components of the adhesive product which is not constructed according to the proportion of the product specification, preparing a bending test piece according to GB/T2567-2008 of resin casting body performance test method, quickly curing the test piece by heating for 24 hours at 60 ℃, and testing the bending strength P1; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectrum method, and the glass transition temperature T1 of the test piece is measured by adopting a differential scanning method;
2 groups of bending test pieces with the size meeting the requirements of resin casting body performance test method GB/T2567-2008 are prepared from the adhesive material obtained on the construction site, and the bending strength of the 1 st group of test pieces is directly tested to obtain the bending strength P2; heating the 2 nd group of test pieces at 60 ℃ for 4h, airing to normal temperature, and testing the bending strength of the test pieces to obtain the bending strength P3; testing by adopting an infrared spectroscopy to obtain infrared spectrograms of the 2 groups of test pieces; testing the glass transition temperature Tg of the 2 groups of samples by adopting a differential scanning method, thereby obtaining the glass transition temperature T2 of the 1 st group of unheated test pieces and the glass transition temperature T3 of the 2 nd group of test pieces after heating treatment;
step 2.2: disposal of
Comparing 3 groups of test piece infrared spectrograms, if the difference of characteristic peaks of typical functional groups is large, the test piece is lack of consistency, and the test piece needs to be removed due to work stealing and material reducing; on the contrary, the composition of the test piece is consistent;
secondly, on the premise that the infrared spectrograms of the 3 groups of test pieces are consistent, the bending strength of the 3 groups of test pieces is compared, and whether the part which is not cured sufficiently is dismounted or reserved is determined;
if the bending strength P2 and the bending strength P3 are both smaller than the bending strength P1 and are both smaller than the technical index requirements specified by product standards, removing the insufficiently cured part;
if the bending strength P2 is less than the bending strength P1, but the bending strength P3 is close to the bending strength P1 and meets the technical index requirements specified by the product standard, the glass transition temperature T3 and the glass transition temperature T1 need to be further compared; if the glass transition temperature T3 is less than the glass transition temperature T1, this indicates that the insufficiently cured adhesive material is not sufficiently heat resistant and should be removed from the insufficiently cured part; if the glass transition temperature T3 is comparable to the glass transition temperature T1, then the insufficiently cured portions may remain.
(3) The phenomenon that the color of the glue after curing is different
Aiming at the problems that the structural adhesive in engineering is solidified, but has obvious color difference and is worried about insufficient strength, the following treatment can be carried out:
step 3.1: examination of
Taking out the cured adhesive material with obvious color difference from the construction site in a micro-damage mode, and simultaneously taking out the adhesive product which is not constructed;
preparing a bending test piece by using the adhesive material with obvious chromatic aberration obtained on a construction site according to the resin casting body performance test method GB/T2567-2008, testing the bending strength of the bending test piece, and testing the infrared spectrogram of the test piece; mixing the components of the adhesive product which is not constructed according to the proportion of a product specification, preparing a bending test piece according to GB/T2567-2008 of resin casting body performance test method, quickly curing the test piece by adopting a heating treatment mode of 60 ℃ for 24 hours, and testing the bending strength P1 of the test piece; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectroscopy test;
step 3.2: disposal of
Comparing infrared spectrograms of a cured adhesive material with obvious chromatic aberration and a test piece of an adhesive product which is not constructed, and if the difference of characteristic peaks of typical functional groups is large, indicating that the cured adhesive material and the test piece of the adhesive product which is not constructed are lack of consistency, and the cured adhesive material and the test piece of the adhesive product which is not constructed are stolen, reduced in material and required to be disassembled;
secondly, on the premise of consistent infrared spectrogram, the chromatic aberration can be judged to be caused by construction reasons; if the bending strength of the on-site cured adhesive material test piece is less than the technical index requirement specified by the product standard, removing the test piece; if the bending strength meets the requirement of the product standard index, the bending strength is reserved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (5)
1. The method for quickly inspecting and disposing the construction quality defects of the adhesive for structural reinforcement comprises three phenomena of adhesive non-curing, adhesive curing insufficiency and color difference after the adhesive is cured, and is characterized in that the method is respectively inspected and disposed according to the following steps:
(1) phenomenon of glue not curing
Aiming at the phenomenon that the structural adhesive is not cured in engineering, the adhesive is mainly in a flowing state after construction, and the following inspection and treatment can be carried out:
step 1.1: examination of
Taking the flowing glue solution and an adhesive product which is not constructed to form two samples, and respectively analyzing the compositions of the two samples by adopting an observation method, an infrared spectroscopy method and an X fluorescence analysis method;
wherein, the observation method mainly judges whether the appearance colors of the two samples are consistent;
if the colors are consistent, the positions of the characteristic peaks of the molecular functional groups in the infrared spectrogram obtained by combining the infrared spectroscopy are required to further judge whether the chemical compositions of the two samples are consistent;
if the colors are not consistent, an X fluorescence analysis method is combined to analyze the two sample elements; simultaneously, the consistency of the compositions of the two sample materials is analyzed by combining the infrared spectrogram; if the compositions of the materials are consistent, the reinforced adhesive material for field construction has no problem, and the reinforced adhesive material can be judged to be not mixed according to the proportion of a product specification during construction, or metal elements are mixed into the adhesive liquid at the bonding part of the reinforced adhesive material and the adhesive; if the material compositions are not consistent, the adhesive product during construction is inconsistent with the product entering the factory;
step 2.2: disposal of
Materials and parts of the obvious flowing parts need to be dismantled, wherein, for concealed engineering, a drilling method is adopted to distinguish whether the adhesive flowing condition exists in advance, and then all components of the adhesive product for reinforcement are mixed correctly and fully according to the proportion required by the specification and then are constructed;
(2) for the phenomenon of insufficient glue curing
Aiming at the phenomenon of insufficient curing of the structural adhesive in engineering, the curing is mainly shown in that although the adhesive material after construction is solidified, the overall hardness is not high, and the following treatment can be carried out:
step 2.1: examination of
Taking out the blocky cured adhesive material from a construction site in a micro-damage mode, and simultaneously taking out the adhesive product which is not constructed;
mixing the components of the adhesive product which is not constructed according to the proportion of the product specification, preparing a bending test piece according to GB/T2567 plus 2008 of resin casting body performance test method, quickly curing the test piece, and testing the bending strength P1; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectroscopy test, and the glass transition temperature T1 of the test piece is measured by adopting a differential scanning method;
2 groups of bending test pieces with the size meeting the requirements of resin casting body performance test method GB/T2567-2008 are prepared from the adhesive material obtained on the construction site, and the bending strength of the 1 st group of test pieces is directly tested to obtain the bending strength P2; heating the test pieces in the group 2, airing to normal temperature, and testing the bending strength of the test pieces to obtain bending strength P3; testing by adopting an infrared spectroscopy to obtain infrared spectrograms of the 2 groups of test pieces; testing the glass transition temperature Tg of the 2 groups of samples by adopting a differential scanning method, thereby obtaining the glass transition temperature T2 of the 1 st group of unheated test pieces and the glass transition temperature T3 of the 2 nd group of test pieces after heating treatment;
step 2.2: treatment of
Comparing 3 groups of test piece infrared spectrograms, if the difference of characteristic peaks of typical functional groups is large, the test piece is lack of consistency, and the test piece needs to be removed due to work stealing and material reducing; on the contrary, the composition of the test piece is consistent;
secondly, on the premise that the infrared spectrograms of the 3 groups of test pieces are consistent, the bending strength of the 3 groups of test pieces is compared, and whether the part which is not cured sufficiently is dismounted or reserved is determined;
(3) the phenomenon that the color of the glue after curing is different
Aiming at the problems that the structural adhesive in engineering is solidified, but has obvious color difference and is worried about insufficient strength, the following treatment can be carried out:
step 3.1: examination of
Taking out the cured adhesive material with obvious color difference in a micro-damage mode from a construction site, and simultaneously taking out an adhesive product which is not constructed;
preparing a bending test piece by using the adhesive material with obvious chromatic aberration obtained on a construction site according to the resin casting body performance test method GB/T2567-2008, testing the bending strength of the bending test piece, and testing the infrared spectrogram of the test piece; after mixing the components of the adhesive product which is not constructed according to the mixture ratio of the product specification, preparing a bending test piece according to GB/T2567-2008 of resin casting body performance test method, quickly curing the test piece, and testing the bending strength P1; meanwhile, an infrared spectrum of the test piece is obtained by adopting an infrared spectroscopy test;
step 3.2: disposal of
Comparing infrared spectrograms of a cured adhesive material with an adhesive product test piece which is not constructed with obvious chromatic aberration, and if the difference of characteristic peaks of typical functional groups is large, indicating that the cured adhesive material is lack of consistency with the adhesive product test piece which is not constructed, and the cured adhesive material and the adhesive product test piece which is not constructed with the obvious chromatic aberration are removed due to the fact that labor is stolen and the material is reduced;
secondly, on the premise of consistent infrared spectrogram, the chromatic aberration can be judged to be caused by construction reasons; if the bending strength of the on-site cured adhesive material test piece is less than the technical index requirement specified by the product standard, removing the test piece; if the bending strength meets the requirement of the product standard index, the bending strength is reserved.
2. The method for rapidly inspecting and disposing construction quality defects of the adhesive for structural reinforcement according to claim 1, wherein the method comprises the following steps: in the second step of 2.2, a specific method for determining whether to dismantle or keep the insufficiently cured part is as follows;
if the bending strength P2 and the bending strength P3 are both smaller than the bending strength P1 and are both smaller than the technical index requirements specified by the product standards, removing the part which is not cured sufficiently;
if the bending strength P2 is less than the bending strength P1, but the bending strength P3 is close to the bending strength P1 and meets the technical index requirements specified by product standards, the glass transition temperature T3 and the glass transition temperature T1 need to be further compared; if the glass transition temperature T3 is less than the glass transition temperature T1, this indicates that the cured adhesive material is not sufficiently heat resistant and should be removed from the insufficiently cured part; if the glass transition temperature T3 is comparable to the glass transition temperature T1, then the insufficiently cured portions may remain.
3. The method for rapidly inspecting and disposing construction quality defects of the adhesive for structural reinforcement according to claim 2, wherein the method comprises the following steps:
in the step 2.1, the bending test piece obtained by mixing the components of the adhesive product which is not constructed according to the proportion of the product specification and the bending test piece prepared by mixing the components of the adhesive product which is not constructed in the step 3.1 according to the proportion of the product specification are quickly cured by heating at 60 ℃ for 24 hours;
and in the step 2.1, the 2 nd group of bending test pieces prepared by the adhesive material obtained on the construction site are quickly cured by heating at 60 ℃ for 4 h.
4. The method for rapidly inspecting and disposing construction quality defects of the adhesive for structural reinforcement according to claim 1, wherein the method comprises the following steps: the adhesive for reinforcing the structure comprises adhesive types specified in general specification for building identification and reinforcement GB 55021-2021 and technical specification for safety identification of engineering structural reinforcing materials GB 50728-2011.
5. The method for rapidly inspecting and disposing the construction quality defects of the adhesive for the structural reinforcement according to claim 4, wherein the method comprises the following steps: the adhesive for reinforcing the structure comprises an adhesive for reinforcing bonded steel, an adhesive for reinforcing poured steel, an adhesive for pasting a fiber composite material, an adhesive for anchoring embedded steel bars or an adhesive for repairing cracks.
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| CN101435772A (en) * | 2008-12-12 | 2009-05-20 | 三星高新电机（天津）有限公司 | Epoxide-resin glue curing degree and hardness detecting and analyzing method |
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