CN113045242A - Composite modified cement adhesive and preparation method and application thereof - Google Patents
Composite modified cement adhesive and preparation method and application thereof Download PDFInfo
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- CN113045242A CN113045242A CN202110326081.4A CN202110326081A CN113045242A CN 113045242 A CN113045242 A CN 113045242A CN 202110326081 A CN202110326081 A CN 202110326081A CN 113045242 A CN113045242 A CN 113045242A
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- 239000004568 cement Substances 0.000 title claims abstract description 63
- 239000000853 adhesive Substances 0.000 title claims abstract description 61
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 61
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- 229920000620 organic polymer Polymers 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 230000002940 repellent Effects 0.000 claims abstract description 11
- 239000005871 repellent Substances 0.000 claims abstract description 11
- 239000002562 thickening agent Substances 0.000 claims abstract description 11
- 239000007822 coupling agent Substances 0.000 claims abstract description 10
- 239000004952 Polyamide Substances 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 15
- 229920002647 polyamide Polymers 0.000 claims description 15
- 229920000768 polyamine Polymers 0.000 claims description 15
- 150000007942 carboxylates Chemical class 0.000 claims description 13
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 13
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 claims description 12
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 10
- 239000001913 cellulose Substances 0.000 claims description 9
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 9
- 239000011380 pervious concrete Substances 0.000 claims description 9
- -1 sodium fatty alcohol Chemical class 0.000 claims description 9
- GBPOWOIWSYUZMH-UHFFFAOYSA-N sodium;trihydroxy(methyl)silane Chemical compound [Na+].C[Si](O)(O)O GBPOWOIWSYUZMH-UHFFFAOYSA-N 0.000 claims description 9
- 229920002125 Sokalan® Polymers 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004584 polyacrylic acid Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 7
- SBRXLTRZCJVAPH-UHFFFAOYSA-N ethyl(trimethoxy)silane Chemical compound CC[Si](OC)(OC)OC SBRXLTRZCJVAPH-UHFFFAOYSA-N 0.000 claims description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 7
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000000230 xanthan gum Substances 0.000 claims description 4
- 229920001285 xanthan gum Polymers 0.000 claims description 4
- 229940082509 xanthan gum Drugs 0.000 claims description 4
- 235000010493 xanthan gum Nutrition 0.000 claims description 4
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 43
- 239000000463 material Substances 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 23
- 239000007787 solid Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010797 grey water Substances 0.000 description 3
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000008030 superplasticizer Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 229940075529 glyceryl stearate Drugs 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete materials, and particularly discloses a composite modified cement adhesive as well as a preparation method and application thereof. The composite modified cement adhesive comprises the following components in percentage by mass: 5 to 15 percent of organic polymer, 0.01 to 0.09 percent of thickening agent, 0.05 to 0.2 percent of stabilizing agent, 0.06 to 1.5 percent of water repellent agent, 0.02 to 0.10 percent of coupling agent, 0.5 to 6 percent of water reducing agent and the balance of water. The composite modified cement adhesive provided by the invention can be used in concrete to increase the cementing property, interface firmness, durability and stability of concrete, increase the water retention property of concrete, prolong the setting time and effectively improve the construction performance of concrete through the synergistic effect of the components.
Description
Technical Field
The invention relates to the technical field of concrete materials, in particular to a composite modified cement adhesive and a preparation method and application thereof.
Background
In the current sponge city construction, the novel road surface paving material of concrete that permeates water obtains the wide application, and this kind of concrete material that permeates water has broken through traditional concrete material's performance, has good water permeability, can pave and obtain the novel ecological environmental protection concrete road surface that can "breathe", effectively reduces road surface ponding, solves the problem that the cyclic utilization of "urban heat island phenomenon" and water resource is low. However, the pervious concrete used at present has large pores and has the problems of low strength, threshing, slag dropping and the like. At present, in order to solve the problems of the pervious concrete, the cement dosage is increased in the concrete, and the increase of the cement dosage can reduce the porosity and the water permeability of the concrete, so that the pavement cracking is more easily caused, and the manufacturing cost of the concrete is increased. Therefore, the method improves the adhesiveness, strength, water retention and durability of the pervious concrete, solves the problems of threshing and slag dropping of the pervious concrete, and becomes a hotspot of the current pervious concrete research.
Disclosure of Invention
Aiming at a series of problems of the existing pervious concrete, the invention provides the composite modified cement adhesive and the preparation method and the application thereof.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the composite modified cement adhesive comprises the following components in percentage by mass:
5-15% of organic polymer, 0.01-0.09% of thickening agent, 0.05-0.2% of stabilizing agent, 0.06-1.5% of water repellent agent, 0.02-0.10% of coupling agent, 0.5-6% of water reducing agent and the balance of water;
the organic polymer is at least one of cellulose, polyacrylic emulsion, styrene-butadiene emulsion, ethylene-vinyl acetate copolymer emulsion and epoxy resin;
the stabilizer is at least one of sodium fatty alcohol polyoxyethylene ether carboxylate, sodium vinylsulfonate and sodium tripolyphosphate;
the water repellent agent is at least one of polyamide polyamine and sodium methylsiliconate.
Compared with the prior art, the composite modified cement adhesive provided by the invention can be used in concrete to improve the cementing property, interface firmness, durability and stability of concrete, increase the water retention property of concrete, prolong the setting time and improve the construction performance by virtue of the synergistic effect of the polymer, the coupling agent, the thickening agent, the stabilizing agent, the water-resisting agent and the water reducing agent. Meanwhile, the mixing amount of cement can be reduced, and the grey-water ratio is reduced. The stabilizer and the organic polymer are added together, so that the stability of a gelling agent system can be improved, the gelation particulate matter precipitation caused by nonuniform aggregation of the organic polymer in an adhesive system can be reduced, the organic polymer is effectively prevented from settling in storage and transportation due to the existence of the organic polymer, a good colloid protection effect is achieved, and the isolation phenomenon can be effectively avoided when the organic polymer is used in concrete. The stabilizer and the thickening agent are added according to the proportion, so that the state of the adhesive is more stable in the storage process. The composite modified cement adhesive has the advantages that polyamide polyamine or sodium methylsiliconate is selected to act as a water repellent agent to react with the organic polymer, so that the wet friction and wet adhesion performance of the adhesive can be improved, water molecules and harmful ions are prevented from permeating into a base material, the waterproof protection purpose is achieved, the waterproof performance and the frost resistance of concrete are improved, meanwhile, after the water repellent agent is combined with a coupling agent and the organic polymer for crosslinking, the flexibility of cement mortar can be obviously improved, the stripping resistance of porous concrete slurry and stone surface is improved, and the strength of concrete is improved. Under the condition of low grey water ratio, the cracking resistance and slag dropping condition of the concrete can be obviously improved.
Preferably, the organic polymer is at least one of cellulose and ethylene-vinyl acetate copolymer emulsion.
The selection of the preferable organic polymer can further improve the stability of the adhesive, and the durability and the use strength of the concrete when the organic polymer is used in the concrete can be further improved.
Preferably, the thickener is at least one of xanthan gum, diatomaceous earth, polyvinyl alcohol and polyacrylic acid.
The preferable components of the thickener can further improve the thickening effect of the thickener on concrete, improve the construction performance and the anti-sagging performance, and prevent the colloid liquid from settling and layering and segregation due to the action of gravity.
Preferably, the water repellent agent is a polyamide polyamine. The water repellent agent can further improve the stripping resistance of the porous concrete slurry and the surface of stone, and improve the use strength of concrete.
Preferably, the stabilizer consists of sodium fatty alcohol-polyoxyethylene ether carboxylate, sodium vinyl sulfonate and sodium tripolyphosphate in a mass ratio of 1:0.2-0.5: 0.8-1.2.
The preferable composition of the stabilizer can enable the stabilizer to slowly react with free radicals in an adhesive system at a specific speed, so that the aggregation of particles in an organic polymer is further reduced, a better suspension stability effect is achieved in the adhesive system, and the storage state of the adhesive is more stable.
Preferably, the coupling agent is at least one of vinyltris (β -methoxyethoxy) silane and ethyltrimethoxysilane.
The vinyl tri (beta-methoxyethoxy) silane and the ethyl trimethoxy silane can exist in a specific molecular bridge form in an adhesive system, so that the interface action between inorganic matters and organic matters in the adhesive system can be effectively improved, the material bonding performance is improved, and the adhesive interface is firmer.
Preferably, the water reducing agent is at least one of a polycarboxylic acid water reducing agent, a naphthalene water reducing agent and an amino water reducing agent.
The water reducing agent can further reduce the water consumption of concrete, reduce the grey-water ratio and improve the physical and mechanical properties of the concrete.
The invention also provides a preparation method of the composite modified cement adhesive. The preparation method comprises the following steps: according to the proportion of the components, the polymer, the thickening agent, the stabilizing agent, the water repellent agent, the coupling agent and water are mixed and stirred uniformly, then the water reducing agent is added, and the mixture is stirred at the speed of 100-.
Compared with the prior art, the preparation method of the composite modified cement adhesive provided by the invention has the advantages of simple process, convenience in operation, resource saving and low investment cost.
The invention provides application of the composite modified cement adhesive as a pervious concrete raw material.
By adding the hairThe composite modified cement adhesive can uniformly disperse polymers in cement paste, tightly combine cement hydrate particles with polymer molecules, mutually attract and bond the cement hydrate particles, and further form a specific three-dimensional space network structure in a mixed system. Meanwhile, in the cement hydration and coagulation process, polymer molecules are chemically changed under the action of the stabilizers, the coupling agents, the water-resisting agents and other auxiliaries, and organic polymer molecules and Ca2+And silica, and form a more stable species in the form of ionic, covalent, polar or molecular attractions. Meanwhile, the organic polymer is permeated into pores in cement slurry under the action of stronger fluidity and permeability, so that the compactness of concrete is increased. Meanwhile, the spatial three-dimensional network structures formed by the cement hydrate particles and the polymer particles in the adhesive are mutually bonded, interpenetrated and interwoven to form a more compact and firmer composite spatial three-dimensional network structure, and the bonding strength of the slurry is further increased when the composite spatial three-dimensional network structure is used in pervious concrete under the condition that the water permeability of the concrete is not influenced. Therefore, the composite modified cement adhesive has extremely high application value in the field of concrete.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following examples are provided to better illustrate the embodiments of the present invention.
Example 1
The composite modified cement adhesive comprises the following components in percentage by mass:
10% of cellulose, 0.05% of xanthan gum, 0.1% of stabilizer, 1% of polyamide polyamine, 0.05% of vinyl tri (beta-methoxyethoxy) silane, 1% of polycarboxylic acid water reducing agent and the balance of water;
wherein the cellulose is hydroxypropyl methylcellulose.
The stabilizer consists of sodium fatty alcohol-polyoxyethylene ether carboxylate, sodium vinyl sulfonate and sodium tripolyphosphate with the mass ratio of 1:0.3: 1;
the sodium fatty alcohol polyoxyethylene ether carboxylate is colorless transparent liquid, the pH value is 8, and the active matter content is 28%;
the sodium vinylsulfonate is a light yellow transparent liquid with the density of 1.2g/cm3；
Sodium tripolyphosphate is white powdery crystal;
the polyamide polyamine is light yellow translucent liquid; solid content: 20 percent and the specific gravity of 1.03;
the polycarboxylate superplasticizer is a slightly yellow liquid, has the solid content of 20 percent, the water reduction rate of 35 percent and the PH value of 7.5.
The preparation method of the composite modified cement adhesive comprises the following steps: according to the proportion of the components, cellulose, xanthan gum, a stabilizer, polyamide polyamine, vinyl tri (beta-methoxyethoxy) silane and water are mixed, stirred for 3min under the condition of 1000r/min, then the polycarboxylic acid water reducing agent is added, and stirred until homogeneous phase mixed liquid is formed, so that the composite modified cement adhesive is obtained.
Example 2
The composite modified cement adhesive comprises the following components in percentage by mass:
5% of ethylene-vinyl acetate copolymer emulsion, 0.01% of diatomite, 0.05% of stabilizer, 0.06% of polyamide polyamine, 0.02% of ethyl trimethoxy silane, 3% of naphthalene water reducer and the balance of water;
wherein the stabilizer consists of sodium fatty alcohol polyoxyethylene ether carboxylate, sodium vinylsulfonate and sodium tripolyphosphate in a mass ratio of 1:0.2: 0.8;
the sodium fatty alcohol polyoxyethylene ether carboxylate is colorless transparent liquid, the pH value is 8, and the active matter content is 28%;
the sodium vinylsulfonate is a light yellow transparent liquid with the density of 1.2g/cm3；
Sodium tripolyphosphate is white powdery crystal;
the polyamide polyamine is light yellow translucent liquid; solid content: 20 percent and the specific gravity of 1.03;
the naphthalene water reducing agent is a tan viscous liquid, the solid content is 45%, the water reducing rate is 20%, and the pH value is 8.
The preparation method of the composite modified cement adhesive comprises the following steps: mixing the ethylene-vinyl acetate copolymer emulsion, the diatomite, the stabilizer, the polyamide polyamine, the ethyltrimethoxysilane and the water according to the mixture ratio of the components, stirring for 5min under the condition of 500r/min, adding the naphthalene water reducer, and stirring to form homogeneous mixed liquid to obtain the composite modified cement adhesive.
Example 3
The composite modified cement adhesive comprises the following components in percentage by mass:
15% of cellulose, 0.09% of polyvinyl alcohol, 0.2% of stabilizer, 1.5% of sodium methylsiliconate, 0.10% of vinyl tri (beta-methoxyethoxy) silane, 6% of naphthalene water reducer and the balance of water;
wherein the stabilizer consists of sodium fatty alcohol polyoxyethylene ether carboxylate, sodium vinylsulfonate and sodium tripolyphosphate in a mass ratio of 1:0.5: 1.2;
the sodium fatty alcohol polyoxyethylene ether carboxylate is colorless transparent liquid, the pH value is 8, and the active matter content is 28%;
the sodium vinylsulfonate is a light yellow transparent liquid with the density of 1.2g/cm3；
Sodium tripolyphosphate is white powdery crystal;
the sodium methylsiliconate is colorless transparent liquid, the solid content is 25 percent, and the specific gravity is 1.24;
the naphthalene water reducing agent is a tan viscous liquid, the solid content is 45%, the water reducing rate is 20%, and the pH value is 8.
The preparation method of the composite modified cement adhesive comprises the following steps: according to the proportion of the components, cellulose, polyvinyl alcohol, a stabilizer, sodium methylsiliconate, vinyl tri (beta-methoxyethoxy) silane and water are mixed, stirred for 2min at the speed of 2000r/min, and then the naphthalene water reducer is added and stirred until homogeneous phase mixed liquid is formed, so that the composite modified cement adhesive is obtained.
Example 4
The composite modified cement adhesive comprises the following components in percentage by mass:
10% of polyacrylic acid emulsion, 0.05% of polyacrylic acid, 0.1% of sodium fatty alcohol-polyoxyethylene ether carboxylate, 1% of sodium methylsiliconate, 0.05% of vinyl tri (beta-methoxyethoxy) silane, 0.5% of polycarboxylic acid water reducing agent and the balance of water;
wherein, the sodium fatty alcohol polyoxyethylene ether carboxylate is colorless transparent liquid, the pH value is 8, and the active matter content is 28%;
the sodium methylsiliconate is colorless transparent liquid, the solid content is 25 percent, and the specific gravity is 1.24;
the polycarboxylate superplasticizer is a yellowish liquid with solid content of 20%, water reduction rate of 35% and pH value of 7.5.
The preparation method of the composite modified cement adhesive comprises the following steps: mixing polyacrylic acid emulsion, polyacrylic acid, sodium fatty alcohol-polyoxyethylene ether carboxylate, sodium methylsiliconate, vinyl tri (beta-methoxyethoxy) silane and water according to the proportion of the components, stirring for 3min under the condition of 1000r/min, adding the polycarboxylic acid water reducing agent, and stirring to form homogeneous phase mixed liquid to obtain the composite modified cement adhesive.
Example 5
The composite modified cement adhesive comprises the following components in percentage by mass:
10% of butylbenzene emulsion, 0.05% of polyacrylic acid, 0.1% of sodium vinylsulfonate, 1% of polyamide polyamine, 0.05% of ethyltrimethoxy silane, 1% of polycarboxylic acid water reducing agent and the balance of water;
wherein, the polyamide polyamine is light yellow semitransparent liquid, and the solid content is as follows: 20 percent and the specific gravity of 1.03;
the polycarboxylate superplasticizer is a yellowish liquid with solid content of 20%, water reduction rate of 35% and pH value of 7.5.
The preparation method of the composite modified cement adhesive comprises the following steps: according to the proportion of the components, mixing styrene-butadiene emulsion, polyacrylic acid, sodium vinyl sulfonate, polyamide polyamine, ethyltrimethoxysilane and water, stirring for 3min at the speed of 1000r/min, adding the polycarboxylic acid water reducing agent, and stirring to form homogeneous mixed liquid to obtain the composite modified cement adhesive.
Comparative example 1
The same amount of polyvinyl acetate was used as an organic polymer in place of the ethylene-vinyl acetate copolymer emulsion in example 1, and the other components and preparation method were the same as in example 1, to obtain a cement adhesive.
Comparative example 2
The same amount of glyceryl stearate as the stabilizer in example 1 was used, and the other components and preparation method were the same as in example 1, to obtain a cement adhesive.
Comparative example 3
The polyamide polyamine in example 1 was removed, and other components and preparation method were the same as in example 1 to obtain a cement adhesive.
The cement adhesives obtained in examples 1 to 5 and comparative examples 1 to 3 were tested for their use in cement concrete by the following specific test methods:
preparing porous modified cement concrete by using P.O42.4 cement, macadam (3-30mm), adhesive (the cement adhesive obtained in examples 1-5 and comparative examples 1-3 respectively) and water, wherein the proportion design (by weight) of each cubic concrete is as follows: 300kg of cement, 1600kg of broken stone, 10kg of adhesive and 800kg of water. 8 porous cement concrete samples were prepared. And (3) preparing concrete samples (the size of a compression-resistant test block is 150mmx150mmx150mm, and the size of a bending-resistant test block is 150mmx150mmx550mm) by using the 8 porous concrete samples and the concrete sample without the adhesive, measuring the setting time of the cement concrete samples, demoulding after 24 hours, and placing in a curing room for standard curing for 28 days.
The compressive strength and the bending tensile strength of the concrete test piece after corresponding test conditions are determined according to road engineering cement and cement concrete test regulations (JTG 3420-.
The performance test results of 8 concrete samples obtained by adding the adhesives obtained in examples 1-5 and comparative examples 1-3 and the concrete samples without adding the cement adhesive after standard curing for 28 days are shown in table 1.
TABLE 1
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The composite modified cement adhesive is characterized in that: the composite material comprises the following components in percentage by mass:
5-15% of organic polymer, 0.01-0.09% of thickening agent, 0.05-0.2% of stabilizing agent, 0.06-1.5% of water repellent agent, 0.02-0.10% of coupling agent, 0.5-6% of water reducing agent and the balance of water;
the organic polymer is at least one of cellulose, polyacrylic emulsion, styrene-butadiene emulsion, ethylene-vinyl acetate copolymer emulsion and epoxy resin;
the stabilizer is at least one of sodium fatty alcohol polyoxyethylene ether carboxylate, sodium vinylsulfonate and sodium tripolyphosphate;
the water repellent agent is at least one of polyamide polyamine and sodium methylsiliconate.
2. The composite modified cement adhesive of claim 1, wherein: the organic polymer is at least one of cellulose and ethylene-vinyl acetate copolymer emulsion.
3. The composite modified cement adhesive of claim 1, wherein: the thickener is at least one of xanthan gum, diatomite, polyvinyl alcohol and polyacrylic acid.
4. The composite modified cement adhesive of claim 1, wherein: the water repellent agent is polyamide polyamine.
5. The composite modified cement adhesive of claim 1, wherein: the stabilizer consists of sodium fatty alcohol-polyoxyethylene ether carboxylate, sodium vinyl sulfonate and sodium tripolyphosphate with the mass ratio of 1:0.2-0.5: 0.8-1.2.
6. The composite modified cement adhesive of claim 1, wherein: the coupling agent is at least one of vinyl tri (beta-methoxyethoxy) silane and ethyl trimethoxy silane.
7. The composite modified cement adhesive of claim 1, wherein: the water reducing agent is at least one of a polycarboxylic acid water reducing agent, a naphthalene water reducing agent and an amino water reducing agent.
8. The preparation method of the composite modified cement adhesive as claimed in any one of claims 1 to 7, characterized by comprising the following steps: and according to the mixture ratio of the components, mixing and uniformly stirring the polymer, the thickening agent, the stabilizing agent, the water-resisting agent, the coupling agent and water, then adding the water reducing agent, and stirring to form a homogeneous mixed solution, thereby obtaining the composite modified cement adhesive.
9. The application of the composite modified cement adhesive of any one of claims 1 to 7 as a pervious concrete raw material.
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| CN113045242B (en) | 2022-08-19 |
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