CN112876995B - Water-based repair liquid for pervious concrete and preparation method thereof - Google Patents
Water-based repair liquid for pervious concrete and preparation method thereof Download PDFInfo
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- CN112876995B CN112876995B CN202110090000.5A CN202110090000A CN112876995B CN 112876995 B CN112876995 B CN 112876995B CN 202110090000 A CN202110090000 A CN 202110090000A CN 112876995 B CN112876995 B CN 112876995B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J1/00—Adhesives based on inorganic constituents
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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
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- 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
Abstract
The application relates to the field of concrete repair liquid, and particularly discloses a water-based repair liquid for pervious concrete and a preparation method thereof. The water-based repair liquid for the pervious concrete comprises the following components in percentage by weight: 1: 2, a component A, a component B and a component C; the component A comprises superfine portland cement, nano silicon dioxide, a nano reinforcing agent, nano calcium carbonate, hydrated magnesium aluminum silicate, toner, a polycarboxylic acid water reducing agent and a cream dispersing agent; the component B comprises a water-based nonionic curing agent, water, a defoaming agent and fumed silica; the component C comprises acrylic emulsion, wax emulsion, wetting agent and flatting agent; the preparation method comprises the following steps: and (3) uniformly mixing the component A with the component C and then uniformly mixing the component A with the component B. This application can consolidate the concrete surface that permeates water, improves the concrete intensity that permeates water, increases the toughness of the concrete that permeates water to the crack of the concrete road surface that permeates water is repaired, the life of the concrete that permeates water has been prolonged.
Description
Technical Field
The application relates to the field of concrete repair liquid, in particular to water-based repair liquid for pervious concrete and a preparation method thereof.
Background
The pervious concrete is porous light concrete prepared by mixing aggregate, cement, a nano reinforcing agent and water, and has the characteristics of air permeability, water permeability and light weight. The pervious concrete can make rainwater flow into the ground, effectively supplement underground water, relieve urban environmental problems such as rapid decline of urban underground water level and the like, and effectively eliminate environmental pollution caused by oil compounds on the ground and the like.
Sponge cities go deep into the heart, and more pervious concrete is used in cities. Due to various reasons such as construction and material use, the porous property of the pervious concrete causes the pervious concrete to have generally lower surface strength and small cohesive force among coarse aggregates, so that the phenomenon of stone particles falling off from the pervious concrete pavement often occurs, the attractiveness is influenced, and the service life of the pervious concrete is short. In order to prolong the service life of the pervious concrete pavement, the road paving department usually seeks a solution on the production material of the pervious concrete at present, for example, adding a pervious concrete nano reinforcing agent in the pervious concrete production process to improve the durability of the pervious concrete.
However, when the nano reinforcing agent for the pervious concrete is actually used, the effect of improving the surface strength of the pervious concrete pavement is poor, so that a highway maintenance department seeks to reinforce the pervious concrete pavement by using a repairing liquid of other concrete pavements. However, the concrete repair liquid sold in the market at present has poor cohesiveness with a pervious concrete pavement regardless of inorganic repair liquid or organic repair liquid, and most of the organic repair liquids are not environment-friendly and do not accord with the current concept of environmental protection.
With respect to the related art in the above, the inventors consider that: the development of an environment-friendly repair liquid suitable for pervious concrete is urgently needed to improve the adhesive force of stone particles so as to solve the problem that the stone particles fall off from the pervious concrete and prolong the service life of the pervious concrete.
Disclosure of Invention
In order to solve the problem that stone particles fall from pervious concrete and prolong the service life of the pervious concrete, the application provides the aqueous repairing liquid for the pervious concrete and the preparation method thereof.
In a first aspect, the application provides an aqueous repair liquid for pervious concrete, which adopts the following technical scheme:
an aqueous repairing liquid for pervious concrete, which comprises the following components in a weight ratio of 0.5: 1: 2, a component A, a component B and a component C;
the component A comprises 15-30 parts of superfine portland cement, 10-20 parts of nano silicon dioxide, 15-30 parts of nano reinforcing agent, 20-50 parts of nano calcium carbonate, 0.1-0.5 part of hydrated magnesium aluminum silicate, 5-10 parts of toner, 0.1-0.5 part of polycarboxylic acid water reducing agent and 0.02-0.1 part of cream dispersing agent by weight;
the component B comprises 30-60 parts of water-based nonionic curing agent, 20-40 parts of water, 1-2 parts of defoaming agent and 1-6 parts of fumed silica;
the component C comprises 60-80 parts of acrylic emulsion, 3-5 parts of wax emulsion, 0.1-0.2 part of wetting agent and 0.05-0.1 part of flatting agent.
By adopting the technical scheme, as the nano-grade materials such as the superfine portland cement, the nano-grade silicon dioxide, the nano-grade reinforcing agent, the nano-grade calcium carbonate and the like are adopted to interact and crosslink with the cream dispersing agent, the hydrated magnesium aluminum silicate and the polycarboxylic acid water reducing agent, the bonding strength between the repair liquid and the pervious concrete is improved, loose particles of the pervious concrete can be repaired, the surface of the pervious concrete is reinforced, the strength of the pervious concrete is improved, and the service life of the pervious concrete is prolonged. The nano-grade material can further promote the repair liquid to permeate into capillary pores of the pervious concrete, and the repair liquid is secondarily hydrated with the unhydrated pervious concrete cementing material, so that the toughness of the pervious concrete is improved, cracks of the pervious concrete are repaired, the nano-grade material can be prevented from being agglomerated by the interaction of the cream dispersant and the hydrated aluminum magnesium silicate, and the uniformity of the repair liquid is improved. In conclusion, the repair liquid can reinforce the surface of the pervious concrete, improve the strength of the pervious concrete, increase the toughness of the pervious concrete, repair cracks on the pervious concrete pavement and prolong the service life of the pervious concrete.
Preferably, the particle size of the superfine portland cement is 1000 meshes.
By adopting the technical scheme, the matching effect of the superfine portland cement and other raw materials is better by controlling the granularity of the superfine portland cement, and the bonding strength between the repair liquid and the pervious concrete is further improved, so that the adhesive force of stone particles is improved.
Preferably, the particle size of the hydrated aluminum-magnesium silicate is 800 meshes.
Preferably, the aqueous nonionic curing agent is a mixture of an aqueous isocyanate and a bisphenol a type epoxy resin.
By adopting the technical scheme, the problem of poor heat resistance of the bisphenol A epoxy resin is solved by compounding the water-based isocyanate and the bisphenol A epoxy resin, the curing effect of the repair liquid is improved, and simultaneously, the repair liquid and the acrylic emulsion act together, so that the secondary hydration between the repair liquid and the pervious concrete gel material is enhanced, and the strength of the pervious concrete is improved.
Preferably, the weight ratio of the water-based isocyanate to the bisphenol A epoxy resin is 1: (0.3-0.5).
By adopting the technical scheme, the compatibility of the nano-scale material in the repairing liquid and other raw materials is further improved by adjusting the proportion of the water-based isocyanate and the bisphenol A type epoxy resin, the secondary hydration of the repairing liquid and the permeable concrete gel material can be promoted, and the strength of the concrete is improved.
Preferably, the defoaming agent is a polyether modified organic silicon defoaming agent connected by-Si-O-C-.
By adopting the technical scheme, the polyether modified organic silicon type defoaming agent connected with the-Si-O-C-and other materials of the repair liquid are crosslinked with each other, so that the combination of the repair liquid and the pervious concrete can be promoted, and the stability of the polyether modified organic silicon type defoaming agent connected with the-Si-O-C-can be improved under the combined action of the hydrated aluminum magnesium silicate and the nano-grade material, so that the bonding strength between the repair liquid and the pervious concrete is improved.
Preferably, the wetting agent is selected from one or more of ST-5000, HY-352 and HY-354.
By adopting the technical scheme, the compatibility of the ST-5000, HY-352 and HY-354 with the repairing liquid is higher, the secondary hydration between the repairing liquid and the pervious concrete gel material can be promoted, and the strength of the pervious concrete is improved.
Preferably, the leveling agent is selected from one or more of carboxymethyl cellulose and Acrysol @ RM-2020; more preferably, the leveling agent is a mixture of carboxymethyl cellulose and Acrysol @ RM-2020.
By adopting the technical scheme, Acrysol @ RM-2020 has a better leveling effect, but has low compatibility with other raw materials of the repair liquid, the carboxymethyl cellulose can be cooperated with Acrysol @ RM-2020 while promoting the compatibility of Acrysol @ RM-2020 with other raw materials of the repair liquid, and Acrysol @ RM-2020 can inhibit the viscosity reduction of the carboxymethyl cellulose, so that the bonding strength between the repair liquid and the pervious concrete is further improved, and the strength of the pervious concrete is improved.
Preferably, the nano reinforcing agent is a mixture of nano sodium silicate and nano potassium silicate.
By adopting the technical scheme, the nano sodium silicate and the nano potassium silicate are the nano silicate suitable for the application.
In a second aspect, the application provides a preparation method of an aqueous repair liquid for pervious concrete, which adopts the following technical scheme:
s1, uniformly mixing the raw materials of the component A to obtain a mixture A, uniformly mixing the raw materials of the component B to obtain a mixture B, and uniformly mixing the raw materials of the component C to obtain a mixture C;
and S2, uniformly mixing the mixture A with the mixture C, and then adding the mixture B and uniformly mixing to prepare the water-based repairing liquid for the pervious concrete.
In summary, the present application has the following beneficial effects:
1. as the application adopts the interaction and the mutual crosslinking of the nano-grade materials such as the superfine portland cement, the nano-grade silicon dioxide, the nano-grade reinforcing agent, the nano-grade calcium carbonate and the like, the cream dispersing agent, the hydrated magnesium aluminum silicate and the polycarboxylic acid water reducing agent, the surface of the pervious concrete can be reinforced, the strength of the pervious concrete is improved, the toughness of the pervious concrete is increased, the cracks of the pervious concrete pavement are repaired, and the service life of the pervious concrete is prolonged;
2. in the application, the waterborne isocyanate and the bisphenol A epoxy resin are preferably compounded, so that the problem of poor heat resistance of the bisphenol A epoxy resin is solved, the curing effect of the repair liquid is improved, and the repair liquid and the acrylic emulsion act together, so that the secondary hydration between the repair liquid and the gel material of the pervious concrete is enhanced, and the strength of the pervious concrete is improved;
3. the method improves the compatibility among the raw materials by gradually mixing the raw materials of the repair liquid, can promote the secondary hydration of the repair liquid and the permeable concrete gel material, and improves the strength of the concrete.
Detailed Description
The present application is further illustrated in detail below with reference to examples, wherein the sources of the raw materials used in the examples are shown in Table 1.
TABLE 1 sources of raw materials for the examples
Examples
Example 1
The preparation method of the aqueous repair liquid for the pervious concrete comprises the following steps:
s1, uniformly mixing 15g of superfine portland cement, 20g of nano-silica, 25g of nano-reinforcing agent, 20g of nano-calcium carbonate, 0.1g of hydrated magnesium aluminum silicate, 5g of red toner, 0.1g of polycarboxylic acid water reducing agent and 0.02g of cream dispersing agent to obtain a mixture A; the granularity of the superfine portland cement is 500 meshes, and the superfine portland cement is obtained by screening K800 type and K1000 type superfine portland cement; the model of the nano reinforcing agent is Z2;
uniformly mixing 50g of water-based isocyanate, 30g of water, 2g of defoaming agent and 3g of fumed silica to prepare a mixture B; the model of the defoaming agent is GP-330;
uniformly mixing 80g of acrylic emulsion, 3g of wax emulsion, 0.2g of wetting agent and 0.05g of carboxymethyl cellulose to prepare a mixture C; the model of the wetting agent is HY-1608;
and S2, uniformly mixing 20g of the mixture A, 40g of the mixture B and 80g of the mixture C to prepare the water-based repairing liquid for the pervious concrete.
Examples 2 to 5
Examples 2 to 5 are based on example 1 and differ from example 1 only in that: the raw materials have different compositions and dosages, which are shown in Table 2.
TABLE 2 examples 1-5 raw material compositions and amounts
Example 6
Example 6 is based on example 5 and differs from example 1 only in that: the granularity of the used superfine portland cement is 1000 meshes, and the superfine portland cement of 1000 meshes is obtained by screening K800 type and K1000 type superfine portland cement.
Example 7
Example 7 is based on example 6 and differs from example 6 only in that: the water-based nonionic curing agent is a mixture of water-based isocyanate and bisphenol A epoxy resin, and the weight ratio of the water-based isocyanate to the bisphenol A epoxy resin is 1: 1.
examples 8 to 10
Examples 8 to 10 are based on example 7 and differ from example 7 only in that: the weight ratio of the aqueous isocyanate to the bisphenol A epoxy resin was varied and is shown in Table 3.
TABLE 3 weight ratio of aqueous isocyanate and bisphenol A epoxy resin of examples 8-10
| Examples | Example 8 | Example 9 | Example 10 |
| Aqueous isocyanate: bisphenol A type epoxy resin (weight ratio) | 1：0.3 | 1：0.5 | 1：0.4 |
Example 11
Example 11 is based on example 10 and differs from example 10 only in that the defoamer used is a defoamer of the polyether-modified silicone type linked with-Si-O-C-prepared by the following method: heating hydrogen-containing silicone oil, polyether and trifluoroacetic acid to 100 ℃ in a nitrogen atmosphere, reacting for 4h, and then cooling to 25 ℃ to obtain a polyether modified organic silicon defoamer connected with-Si-O-C-;
the hydrogen-containing silicone oil is 202 type hydrogen-containing silicone oil which is purchased from Jinan Huanyuan chemical industry Co., Ltd; the polyether is industrial sorbitan monooleate polyoxyethylene ether (Tween-80); the trifluoroacetic acid is analytically pure trifluoroacetic acid and is purchased from Komie chemical reagents, Inc.
Examples 12 to 14
Examples 12 to 14 are based on example 11 and differ from example 11 only in that: the wetting agents used were different and are specified in table 4.
TABLE 4 wetting agent for examples 12-14
| Examples | Example 12 | Example 13 | Example 14 |
| Wetting agent | HY-352 type | HY-354 type | ST-5000 type |
Example 15
Example 15 is based on example 14 and differs from example 14 only in that: the leveling agent is a mixture of carboxymethyl cellulose and Acrysol @ RM-2020, and the weight ratio of the carboxymethyl cellulose to the Acrysol @ RM-2020 is 1: 0.3.
comparative example
Comparative example 1
Comparative example 1 is based on example 2 and differs from example 2 only in that: the nano reinforcing agent is replaced by the same amount of the superfine portland cement.
Comparative example 2
Comparative example 2 is based on example 2 and differs from example 2 only in that: the cream dispersing agent is replaced by the same amount of the superfine portland cement.
Comparative example 3
Comparative example 3 is based on example 2 and differs from example 2 only in that: the hydrated magnesium aluminum silicate is replaced by an equal amount of ultra-fine portland cement.
Comparative example 4
Comparative example 4 is based on example 2 and differs from example 2 only in that: the same amount of superfine portland cement is used to replace polycarboxylic acid water reducing agent.
Comparative example 5
Comparative example 5 is based on example 2 and differs from example 2 only in that: the same amount of superfine portland cement is used to replace nanometer silica and nanometer calcium carbonate.
Comparative example 6
Comparative example 6 is based on example 2 and differs from example 2 only in that: the ultra-fine portland cement is replaced by an equal amount of ordinary portland cement, 325# portland cement, purchased from shanxi lei micro building materials ltd.
Comparative example 7
Comparative example 7 is based on example 5 and differs from example 5 only in that: the acrylic emulsion was replaced with an equal amount of ordinary portland cement.
Performance test
Preparing concrete slurry: 1380g of coarse aggregate and 65g of water are uniformly mixed, 340g of Portland cement, 35g of concrete reinforcing agent and 65g of water are added, and the mixture is stirred for 2min at the speed of 150r/min to prepare the pervious concrete slurry. The concrete reinforcing agent is purchased from Jiangsu Tongji environmental protection materials GmbH, and the product model is TJG-N; the coarse aggregate is crushed stone with the granularity of 5-10nm, and is purchased from pool state remote commerce and trade company; the portland cement is Huarun 425 cement, purchased from Runhe-Hejiangmaterial Co., Ltd, in Fushan City.
And (3) testing the compressive strength: preparing test pieces by using the pervious concrete slurry according to the GB/T50081 standard, curing the test pieces, roll-coating the test pieces with the repair liquid for the pervious concrete prepared in the examples 1-15 and the comparative examples 1-7, wherein each test piece is only roll-coated with one repair liquid, and the roll-coating amount is 10g/cm 2 Setting a control group without spraying the repair liquid, and sprayingAnd (3) carrying out compressive strength test on the test pieces of different cured test pieces according to the test standards of GB/T50081-2019, wherein the test results are shown in Table 5.
And (3) testing tensile strength: preparing test pieces by using the pervious concrete slurry according to the GB/T50081 standard, curing the test pieces, and roll-coating the test pieces with the repairing liquid for the pervious concrete prepared in the examples 1-15 and the comparative examples 1-7, wherein each test piece is only roll-coated with one repairing liquid, and the roll-coating amount is 10g/cm 2 And setting a control group without spraying the repair liquid, and testing the tensile strength of the test piece cured for 28 days according to the test standard GB/T50081-2019, wherein the test results are shown in Table 5.
And (3) freeze-thaw resistance test: preparing test pieces by using the pervious concrete slurry according to GB/T50082-2009 standard, carrying out roller coating on the test pieces after curing for 28 days to prepare the repairing liquid for the pervious concrete, wherein each test piece is only roller coated with one repairing liquid, and the roller coating amount of the repairing liquid is 10g/cm 2 And a control group without spraying the repairing liquid is arranged, then a freeze-thaw cycle test is carried out according to the slow freezing method mentioned in GB/T50082-2009, and the maximum number of freeze-thaw cycles is evaluated, and the test results are shown in Table 5.
And (3) testing the water permeability coefficient: according to the specification of the water permeability coefficient test in T/CSTM 00040- 2 And setting a control group without spraying the repair liquid, and then measuring the water permeability coefficient of the test piece according to the water permeability coefficient test in T/CSTM 00040-.
TABLE 5 test results of examples 1-15 and comparative examples 1-7
The analysis of the above test data shows that:
compared with the control group and the comparative examples 1 to 6, the tensile strength, the compressive strength and the maximum freezing and thawing times of the control group and the comparative examples 1 to 6 are lower than those of the example 5, which shows that the nano-grade materials such as the ultrafine portland cement, the nano-grade silicon dioxide, the nano-reinforcing agent, the nano-grade calcium carbonate and the like, the cream dispersing agent, the hydrated magnesium aluminum silicate and the polycarboxylic acid water reducing agent are adopted to interact and mutually cross-link, so that the surface of the pervious concrete can be reinforced, the strength of the pervious concrete is improved, the toughness of the pervious concrete is increased, the cracks of the pervious concrete pavement are repaired, and the service life of the pervious concrete is prolonged.
Referring to the test data of the examples 5 and 6, it is shown that the superfine portland cement can be better matched with other raw materials by controlling the particle size of the superfine portland cement, and the bonding strength between the repair liquid and the pervious concrete is further improved, so that the tensile strength of the pervious concrete is improved.
Referring to the test data of examples 4-5, 7 and 7, the compounding of the water-based isocyanate and the bisphenol A epoxy resin is demonstrated to solve the problem of poor heat resistance of the bisphenol A epoxy resin, improve the curing effect of the repair liquid, simultaneously act together with the acrylic emulsion, enhance the secondary hydration between the repair liquid and the pervious concrete gel material and improve the strength of the pervious concrete.
Referring to the test data of examples 8-10 and example 7, the adjustment of the ratio of the water-soluble isocyanate and the bisphenol a epoxy resin can further improve the compatibility of the nano-scale material in the repair liquid with other raw materials, promote the secondary hydration of the repair liquid and the pervious concrete gel material, and improve the strength of the concrete.
Referring to the test data of example 11 and example 10, it is demonstrated that the cross-linking between the-Si-O-C-linked polyether-modified silicone defoamer and the repair liquid and other materials can promote the bonding of the repair liquid and the pervious concrete, and the combined action of the hydrated aluminum-magnesium silicate and the nanoscale material can improve the stability of the-Si-O-C-linked polyether-modified silicone defoamer and the bonding strength between the repair liquid and the pervious concrete, thereby improving the tensile strength and the freeze-thaw stability of the pervious concrete.
The test data of examples 12 to 14 and example 11 show that the compatibility of ST-5000, HY-352, and HY-354 with the repair liquid is high, and the secondary hydration between the repair liquid and the pervious concrete gel material can be promoted, thereby improving the strength of the pervious concrete.
Referring to the test data of example 15 and examples 4 to 5, it is shown that carboxymethyl cellulose can promote compatibility of Acrysol @ RM-2020 with other raw materials of the repair liquid, and can act synergistically with Acrysol @ RM-2020, and Acrysol @ RM-2020 can inhibit viscosity reduction of carboxymethyl cellulose, and further improve the adhesive strength between the repair liquid and the pervious concrete, thereby improving the strength of the pervious concrete.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The aqueous repair liquid for the pervious concrete is characterized by comprising the following components in percentage by weight: 1: 2, a component A, a component B and a component C;
the component A comprises 15-30 parts of superfine portland cement, 10-20 parts of nano silicon dioxide, 15-30 parts of nano reinforcing agent, 20-50 parts of nano calcium carbonate, 0.1-0.5 part of hydrated magnesium aluminum silicate, 5-10 parts of toner, 0.1-0.5 part of polycarboxylic acid water reducing agent and 0.02-0.1 part of cream dispersing agent by weight;
the component B comprises 30-60 parts of water-based nonionic curing agent, 20-40 parts of water, 1-2 parts of defoaming agent and 1-6 parts of fumed silica;
the component C comprises 60-80 parts of acrylic emulsion, 3-5 parts of wax emulsion, 0.1-0.2 part of wetting agent and 0.05-0.1 part of flatting agent;
the water-based nonionic curing agent is a mixture of water-based isocyanate and bisphenol A epoxy resin.
2. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the granularity of the superfine portland cement is 1000 meshes.
3. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the particle size of the hydrated magnesium aluminum silicate is 800 meshes.
4. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the weight ratio of the water-based isocyanate to the bisphenol A epoxy resin is 1: (0.3-0.5).
5. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the defoaming agent is a polyether modified organic silicon defoaming agent connected by-Si-O-C-.
6. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the wetting agent is one or more selected from ST-5000, HY-352 and HY-354.
7. The aqueous repair liquid for pervious concrete according to claim 1, which comprises: the leveling agent is selected from one or more of carboxymethyl cellulose and Acrysol @ RM-2020.
8. The preparation method of the aqueous repair liquid for pervious concrete according to any one of claims 1 to 7, comprising the following preparation steps:
s1, uniformly mixing the raw materials of the component A to obtain a mixture A, uniformly mixing the raw materials of the component B to obtain a mixture B, and uniformly mixing the raw materials of the component C to obtain a mixture C;
and S2, uniformly mixing the mixture A and the mixture C, and then adding the mixture B and uniformly mixing to prepare the water-based repair liquid for the pervious concrete.
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| CN109970407A (en) * | 2017-12-15 | 2019-07-05 | 苏州混凝土水泥制品研究院有限公司 | A kind of structural strengthening aqueous epoxy resins modified cement mortar and preparation method thereof |
| CN109626887B (en) * | 2019-01-03 | 2021-07-23 | 长安大学 | High-strength anti-freezing concrete repair mortar and preparation method thereof |
| CN109913109A (en) * | 2019-01-23 | 2019-06-21 | 河北晨阳工贸集团有限公司 | A kind of water-fast high pressure resistant water paint and preparation method thereof |
| CN110627408A (en) * | 2019-10-30 | 2019-12-31 | 苏州大乘环保新材有限公司 | High-thixotropy water-reducing paste material, pervious concrete using high-thixotropy water-reducing paste material and concrete preparation method |
| CN111138897A (en) * | 2019-12-31 | 2020-05-12 | 安徽易彩新材料科技有限公司 | Environment-friendly three-component floor repairing material and preparation method thereof |
| CN111153670A (en) * | 2020-01-16 | 2020-05-15 | 西安建筑科技大学 | Cement concrete pavement rapid repairing material, mortar and preparation method |
| KR102118848B1 (en) * | 2020-03-30 | 2020-06-03 | 주식회사 광림티엔아이 | Reinforcement method for concrete structures using flame retardant adhesive resin impregnated reinforcement fiber composites |
| CN111620715B (en) * | 2020-04-24 | 2022-04-29 | 苏州佳固士新材料科技有限公司 | Water-based capillary crystalline concrete surface repairing reinforcing material and preparation method and application thereof |
| CN111875284B (en) * | 2020-08-11 | 2022-02-11 | 河北省建筑科学研究院有限公司 | Permeable concrete reinforcing agent and preparation method and application thereof |
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