CN110698152A - Early-strength roadbed repairing cement - Google Patents
Early-strength roadbed repairing cement Download PDFInfo
- Publication number
- CN110698152A CN110698152A CN201911172997.8A CN201911172997A CN110698152A CN 110698152 A CN110698152 A CN 110698152A CN 201911172997 A CN201911172997 A CN 201911172997A CN 110698152 A CN110698152 A CN 110698152A
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- cement
- fibers
- alkali
- resistant glass
- mixture
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses early strength roadbed repairing cement which is prepared by taking cement clinker, fly ash, coarse aggregate, slag, fine aggregate and a reinforcing material as raw materials and matching with an auxiliary agent, wherein the cement clinker is quick-hardening sulphoaluminate cement or a proportional mixture of the quick-hardening sulphoaluminate cement and magnesium phosphate cement, and the reinforcing material is a proportional mixture of alkali-resistant glass fibers, steel fibers and basalt fibers, wherein the alkali-resistant glass fibers are subjected to modification treatment, the steel fibers and the basalt fibers comprise common fibers and chopped fibers, and the proportion of the chopped fibers is not less than 50%. The invention can ensure the strength and stability in the cement roadbed repairing process, prolong the service life of the pavement and reduce the pavement construction and maintenance cost.
Description
Technical Field
The invention relates to the technical field of cement preparation processes, in particular to early-strength roadbed repairing cement.
Background
As one of three basic materials in the building industry, cement is the most used building material, has wide application and large using amount, is used as a powdery hydraulic inorganic cementing material, is usually mortar or concrete prepared by adding water and stirring, and is widely applied to construction engineering, traffic engineering, offshore platforms and other infrastructure engineering.
However, the common concrete often has the defects of large brittleness and small compressive strength, and the cement hydration often accompanies the defects of volume shrinkage and the like, along with the increase of the age of the concrete material in the use process, the structure of the concrete can generate cracks, freeze-thaw effect, chlorine-sulfur corrosion or other types of corrosion under the action of various external factors, so that the problems of cracks, denudation, holes and the like of the concrete structure are caused, the strength and the service performance of the concrete are obviously reduced, in the highway engineering, along with the continuous increase of the traffic volume, the load of a locomotive is increased, the damage can be more obvious and rapid, and under the coupling action of the running load, the phenomena of cracking, slurry pumping and plate breaking can be generated, so that the cement concrete is vacuumed, the structure of the pavement is damaged, and further the surrounding is damaged in a larger area, so that the integrity and the stability of the highway are influenced, if the repair processing cannot be carried out in time, the damage to the structure is possibly aggravated, and potential safety hazards are caused.
At present, a common material for modifying a concrete structure is magnesium phosphate cement, but the magnesium phosphate cement has the defects of high brittleness and insufficient strength, and has the defect of strength when a highway subgrade is repaired, so that secondary damage is easy to occur.
Disclosure of Invention
The invention aims to provide the early-strength roadbed repairing cement, which has the advantages of high early strength, stable later strength development, low long-term shrinkage performance and good bending toughness, and solves the technical defects in the prior art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the early-strength roadbed repairing cement comprises the following raw materials in parts by mass:
the cement clinker is quick-hardening sulphoaluminate cement or a mixture cement clinker prepared from the quick-hardening sulphoaluminate cement and magnesium phosphate cement according to the mass ratio of 2: 1-3: 1;
the reinforcing material is a mixture of alkali-resistant glass fibers, steel fibers and basalt fibers in proportion, the mass percent of the alkali-resistant glass fibers in the mixture is 40-62%, the mass percent of the steel fibers is 17-22%, and the mass percent of the basalt fibers is supplemented to 100%; wherein, the alkali-resistant glass fiber adopts ZrO2The alkali-resistant glass fiber containing 12.5-14 wt% is subjected to surface modification treatment, wherein the surface modification treatment mode is that the alkali-resistant glass fiber, m-phenyl neopentyl glycol type unsaturated polyester resin, dehydroacetic acid and 1-3 propylene glycol are uniformly mixed according to the ratio of 60:5:5:1, then the mixture is kept standing for 30-40 min, then the mixture is added into a silane coupling agent KH570 together, mixed and stirred for 60-90 min, and then the mixture is dried by hot air to obtain the alkali-resistant glass fiber after the modification treatment; the steel fibers and the basalt fibers both comprise chopped fibers in a certain proportion, and the proportion of the chopped fibers is not lower than 50%.
The auxiliary agent is further limited to comprise 30-40% of cellulose ether, 0-30% of defoaming agent, 0-30% of water reducing agent, 15-20% of aluminum hydroxide, 5-15% of water repellent and 10-15% of magnesium carbonate. Wherein the cellulose ether is one of ethyl methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose and hydroxyethyl cellulose; the defoaming agent is polyether defoaming agent; the defoaming agent is organic siloxane; the water repellent is a methyl sodium silicate water repellent.
As a further limitation, the early strength agent can be selectively added into the raw materials to accelerate the hydration speed of the cement and promote the development of the early strength of the concrete.
As a further limitation, the coarse aggregate is limestone with continuous grain size and good gradation.
As a further limitation, the fine aggregate is quartz sand with a modulus of 2.4-2.8.
Has the advantages that: the invention has better fluidity and higher early strength, can toughen and modify the matrix of the cement clinker under the condition of ensuring the strength, forms a cross-linking structure in a cement system through the combination of fiber materials, has obviously reduced shrinkage and good wear resistance compared with common cement concrete with the same strength grade, has superior physical and chemical properties after molding, and can effectively prevent secondary cracking of repaired cracks.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The first embodiment is as follows:
in the first embodiment, the early strength roadbed repairing cement is prepared from the following raw materials:
800kg of cement clinker, 300kg of fly ash, 200kg of coarse aggregate, 100kg of slag, 100kg of fine aggregate, 30kg of reinforcing material and 30kg of auxiliary agent, wherein the cement clinker is quick-hardening sulphoaluminate cement; the coarse aggregate is limestone with continuous grain size and good gradation; the fine aggregate is quartz sand with the modulus of 2.4-2.6; the reinforcing material is a fiber mixture comprising 60% of alkali-resistant glass fibers, 9% of steel fibers, 9% of chopped steel fibers, 11% of basalt fibers and 11% of chopped basalt fibers, and the alkali-resistant glass fibers are mixed to contain 14 wt% of ZrO2The alkali-resistant glass fiber is prepared by taking the alkali-resistant glass fiber as a raw material and performing surface modification treatment, wherein the alkali-resistant glass fiber as the raw material is uniformly mixed with m-phenyl neopentyl glycol type unsaturated polyester resin, dehydroacetic acid and 1-3 propylene glycol according to the proportion of 60:5:5:1, then the mixture is kept standing for 40min, and then the silane coupling agent KH570 is added, mixed and stirred for 80min, and finally the mixture is dried by hot air to obtain the alkali-resistant glass fiber.
The auxiliary agents adopted in the formula comprise 30% of cellulose ether, 20% of defoaming agent, 10% of water reducing agent, 15% of aluminum hydroxide, 10% of water repellent and 15% of magnesium carbonate. Wherein the cellulose ether is ethyl methyl cellulose ether; the defoaming agent is a glycerol polyether defoaming agent; the defoaming agent is organic siloxane; the water repellent is a methyl sodium silicate water repellent.
When in use, the cement clinker, the fly ash, the coarse aggregate, the slag and the fine aggregate in parts by weight are stirred and mixed uniformly in a container and then crushed to obtain semi-finished cement; and then placing the semi-finished cement into a stirring barrel, adding water, a reinforcing material and an auxiliary agent, uniformly stirring according to the using mode of common concrete, and pouring.
Example two:
in the second embodiment, the early strength roadbed repairing cement is prepared from the following raw materials:
700kg of cement clinker, 350kg of fly ash, 250kg of coarse aggregate, 120kg of slag, 120kg of fine aggregate, 60kg of reinforcing material and 20kg of auxiliary agent, wherein the cement clinker is prepared from magnesium phosphate cement according to the mass ratio of 2: 1-3: 1; the coarse aggregate is limestone with continuous grain size and good gradation; the fine aggregate is quartz sand with the modulus of 2.6-2.8; the reinforcing material is a fiber mixture comprising 55% of alkali-resistant glass fibers, 8% of steel fibers, 12% of chopped steel fibers, 10% of basalt fibers and 15% of basalt chopped fibers, and the alkali-resistant glass fibers are mixed to contain 13.6 wt% of ZrO2The alkali-resistant glass fiber is prepared by taking the alkali-resistant glass fiber as a raw material and performing surface modification treatment, wherein the alkali-resistant glass fiber as the raw material is uniformly mixed with m-phenyl neopentyl glycol type unsaturated polyester resin, dehydroacetic acid and 1-3 propylene glycol according to the proportion of 60:5:5:1, then the mixture is kept standing for 35min, then the silane coupling agent KH570 is added for mixing and stirring, and the mixture is stirred for 80min and then dried by hot air to prepare the alkali-resistant glass fiber.
The auxiliary agents adopted in the formula comprise 35% of cellulose ether, 10% of defoaming agent, 10% of water reducing agent, 18% of aluminum hydroxide, 12% of water repellent and 15% of magnesium carbonate. Wherein the cellulose ether is carboxymethyl cellulose ether; the defoaming agent is a glycerol polyether defoaming agent; the defoaming agent is organic siloxane; the water repellent is a methyl sodium silicate water repellent.
When in use, the cement clinker, the fly ash, the coarse aggregate, the slag and the fine aggregate in parts by weight are stirred and mixed uniformly in a container and then crushed to obtain semi-finished cement; and then placing the semi-finished cement into a stirring barrel, adding water, a reinforcing material and an auxiliary agent, then matching with an early strength agent, uniformly stirring according to the using mode of common concrete, and pouring.
The early strength roadbed repairing cement prepared in the first embodiment and the second embodiment of the invention can effectively form a cross-linked structure in a formed reinforcing structure layer by adding the reinforcing material, and as the steel fiber and the basalt fiber can obviously improve the mechanical property, especially the bending and pulling resistance, of the super early strength cement-based material, but can reduce the working performance and the long-term shrinkage performance of the super early strength cement-based material, the reduction of the shrinkage performance can be effectively relieved by adding the modified alkali-resistant glass fiber, meanwhile, the short-cut fiber with a certain proportion is doped in the steel fiber and the basalt fiber, the occurrence and the expansion of microcracks can be inhibited by the short-cut fiber in the early stage of the formation of micro-cracks in the reinforcing layer, and a cross-linked structure is formed by the long fiber and the alkali-resistant glass fiber, and the mechanical property of the super early strength cement can be improved more obviously by the mixed cross-linked structure formed by the materials with different tensile strengths, when the cracks gradually expand into macrocracks, most of the short and thin steel fibers are pulled out, the crack resistance is lost, the development of the cracks is inhibited through the cross-linked network after the long fibers are stabilized, the long and thin steel fibers are mixed to play respective functions in different stages, the repair effect of the early-strength roadbed repair cement is effectively improved, and the early-strength roadbed repair cement is particularly suitable for repairing a pavement structure.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The early-strength roadbed repairing cement is characterized by comprising the following raw materials in parts by mass:
the cement clinker is quick-hardening sulphoaluminate cement or a mixture cement clinker prepared from the quick-hardening sulphoaluminate cement and magnesium phosphate cement according to the mass ratio of 2: 1-3: 1;
the reinforcing material is a mixture of alkali-resistant glass fibers, steel fibers and basalt fibers in proportion, the mass percent of the alkali-resistant glass fibers in the mixture is 40-62%, the mass percent of the steel fibers is 17-22%, and the mass percent of the basalt fibers is supplemented to 100%; wherein, the alkali-resistant glass fiber adopts ZrO2The alkali-resistant glass fiber containing 12.5-14 wt% is subjected to surface modification treatment, wherein the surface modification treatment mode is that the alkali-resistant glass fiber, m-phenyl neopentyl glycol type unsaturated polyester resin, dehydroacetic acid and 1-3 propylene glycol are uniformly mixed according to the ratio of 60:5:5:1, then the mixture is kept standing for 30-40 min, then the mixture is added into a silane coupling agent KH570 together, mixed and stirred for 60-90 min, and then the mixture is dried by hot air to obtain the alkali-resistant glass fiber after the modification treatment; the steel fibers and the basalt fibers both comprise chopped fibers in a certain proportion, and the proportion of the chopped fibers is not lower than 50%.
2. The early strength roadbed repairing cement as claimed in claim 1, wherein the auxiliary agent comprises 30-40% of cellulose ether, 0-30% of defoaming agent, 0-30% of water reducing agent, 15-20% of aluminum hydroxide, 5-15% of water repellent and 10-15% of magnesium carbonate.
3. The early strength subgrade repair cement of claim 2, wherein said cellulose ether is one of ethyl methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose.
4. The early strength subgrade restoration cement according to claim 2, wherein said defoamer is a polyether defoamer.
5. The early strength subgrade restoration cement according to claim 2, wherein said defoamer is an organosiloxane.
6. The early strength roadbed restoration cement as claimed in claim 2, wherein the water repellent is a sodium methyl silicate water repellent.
7. The early strength subgrade restoration cement according to claim 1, wherein said coarse aggregate is continuous-grain, well-graded limestone.
8. The early strength subgrade restoration cement according to claim 1, wherein the fine aggregate is quartz sand with a modulus of 2.4-2.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172997.8A CN110698152A (en) | 2019-11-26 | 2019-11-26 | Early-strength roadbed repairing cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172997.8A CN110698152A (en) | 2019-11-26 | 2019-11-26 | Early-strength roadbed repairing cement |
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| Publication Number | Publication Date |
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| CN110698152A true CN110698152A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911172997.8A Withdrawn CN110698152A (en) | 2019-11-26 | 2019-11-26 | Early-strength roadbed repairing cement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159168A (en) * | 2020-09-02 | 2021-01-01 | 中铁大桥局第七工程有限公司 | C35 basalt fiber concrete for abutment and preparation method thereof |
| CN113443844A (en) * | 2021-03-25 | 2021-09-28 | 罗安锰 | Glass fiber cement and production process thereof |
| CN113683344A (en) * | 2021-08-18 | 2021-11-23 | 广东汇航建设工程有限公司 | Normal-temperature rapid repairing material for track disease of asphalt pavement and repairing method thereof |
| CN113912310A (en) * | 2021-10-13 | 2022-01-11 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
| CN114436575A (en) * | 2022-02-24 | 2022-05-06 | 西安理工大学 | High-corrosion-resistance double-fiber composite-doped modified repair mortar and preparation method thereof |
| CN114507036A (en) * | 2022-02-24 | 2022-05-17 | 西安理工大学 | Inactivated and sterilized high-corrosion-resistance basalt fiber modified concrete and preparation method thereof |
-
2019
- 2019-11-26 CN CN201911172997.8A patent/CN110698152A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159168A (en) * | 2020-09-02 | 2021-01-01 | 中铁大桥局第七工程有限公司 | C35 basalt fiber concrete for abutment and preparation method thereof |
| CN113443844A (en) * | 2021-03-25 | 2021-09-28 | 罗安锰 | Glass fiber cement and production process thereof |
| CN113683344A (en) * | 2021-08-18 | 2021-11-23 | 广东汇航建设工程有限公司 | Normal-temperature rapid repairing material for track disease of asphalt pavement and repairing method thereof |
| CN113912310A (en) * | 2021-10-13 | 2022-01-11 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
| CN113912310B (en) * | 2021-10-13 | 2022-09-13 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
| CN114436575A (en) * | 2022-02-24 | 2022-05-06 | 西安理工大学 | High-corrosion-resistance double-fiber composite-doped modified repair mortar and preparation method thereof |
| CN114507036A (en) * | 2022-02-24 | 2022-05-17 | 西安理工大学 | Inactivated and sterilized high-corrosion-resistance basalt fiber modified concrete and preparation method thereof |
| CN114507036B (en) * | 2022-02-24 | 2023-10-13 | 西安理工大学 | Inactivated and sterilized basalt fiber modified concrete with high corrosion resistance and preparation method thereof |
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Application publication date: 20200117 |