CN111960761A - Polymer waterproof concrete and preparation method thereof - Google Patents
Polymer waterproof concrete and preparation method thereof Download PDFInfo
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- CN111960761A CN111960761A CN202010808997.9A CN202010808997A CN111960761A CN 111960761 A CN111960761 A CN 111960761A CN 202010808997 A CN202010808997 A CN 202010808997A CN 111960761 A CN111960761 A CN 111960761A
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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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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 invention discloses polymer waterproof concrete and a preparation method thereof, belonging to the technical field of concrete and comprising the following compositions in parts by weight: 630-650 parts of coarse aggregate, 585-610 parts of fine aggregate, 430-450 parts of cement, 210-230 parts of water, 30-35 parts of fly ash, 20-25 parts of hydroxypropyl methyl cellulose, 12-15 parts of polyurethane film forming agent and 8-10 parts of acrylic resin film forming agent. The polymer waterproof concrete and the preparation method thereof provided by the invention can enhance the waterproof performance of the concrete and also enhance the strength and impermeability of the concrete.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to polymer waterproof concrete and a preparation method thereof.
Background
The waterproof concrete has high impermeability and meets the waterproof requirement. The common waterproof concrete has the general seepage pressure of 0.6-2.5 MPa, is simple and convenient to construct, low in manufacturing cost and reliable in quality, and is suitable for overground and underground waterproof engineering.
The invention patent application with publication number CN1844019A discloses a novel waterproof and anticorrosive concrete material, which selects paraffin as an additive, and adds the paraffin into the concrete, wherein the addition amount of the paraffin is 1-3% of the total weight of the concrete, and the concrete mixture ratio is as follows: cement, sand, stone, water and wax particles are 1: 2.26: 3.69: 0.6: 0.01-0.03. The concrete material is applied to concrete buildings such as bridges, engineering concrete of harbors and wharfs, concrete dams, cooling towers of power plants, concrete pools, sewage pipes and the like for leakage prevention and corrosion prevention, has good leakage prevention and corrosion prevention performance, can prolong the service life of the concrete building and reduce the maintenance cost, and has good popularization and application prospects.
In the related art, the inventor thinks that paraffin is brittle, the strength of concrete is reduced to a certain extent after paraffin is mixed, the waterproof performance is stronger when the mixed paraffin is more, but the strength is reduced more correspondingly, the melting point of paraffin is very low, and the material is easy to peel off when being used in a high-temperature environment all year round, so that the service life is short.
Disclosure of Invention
In view of the defects of the prior art, the first object of the invention is to provide a polymer waterproof concrete, which can enhance the waterproof performance of the concrete and the strength and impermeability of the concrete.
In order to achieve the purpose, the invention provides the following technical scheme: a polymer waterproof concrete comprises the following compositions in parts by weight: 630-650 parts of coarse aggregate, 585-610 parts of fine aggregate, 430-450 parts of cement, 210-230 parts of water, 30-35 parts of fly ash, 20-25 parts of hydroxypropyl methyl cellulose, 12-15 parts of polyurethane film forming agent and 8-10 parts of acrylic resin film forming agent.
By adopting the technical scheme, the sticky and slippery hydroxypropyl methyl cellulose adsorbs the fly ash to be stuck between cement pores, so that the strength of cement is improved, and cement is adhered with fine aggregate, filled between coarse aggregate and adhered to be cohered, thereby improving the compactness and strength of concrete. The viscous and slippery hydroxypropyl methyl cellulose can reduce the friction of concrete mixture and is beneficial to improving the slump. The pores among the aggregates are filled, so that the communication of the pores in the concrete is blocked, and the impermeability of the concrete is improved. The polyurethane film forming agent and the acrylic resin film forming agent are compounded to form a viscoelastic hydrophobic film inside and outside the concrete, so that the possibility of water permeating into the concrete when contacting with water is further reduced, and the waterproofness of the concrete is improved.
Preferably, the composition also comprises 5-10 parts of sodium hexametaphosphate and 3-5 parts of magnesite.
By adopting the technical scheme, the sodium hexametaphosphate is hydrolyzed into NaH when meeting water2PO4，NaH2PO4Reacting with magnesite to form Mg (H)2PO4)2，Mg(H2PO4)2MgHPO is formed soon after drying4，MgHPO4The adhesive has high cohesiveness, and film layers formed by the polyurethane film forming agent and the acrylic resin film forming agent can be mutually attached, so that gaps among the film layers are reduced, and the possibility that water penetrates into concrete from the film layers is further reduced.
Further, the composition also comprises 10-15 parts of pyrogallol modified polymethyl siloxane, 5-10 parts of ferric chloride and 3-8 parts of titanium dioxide nano particles.
By adopting the technical scheme, the pyrogallol and the iron coordination crosslinking improve the hydrophobicity of the polyurethane film forming agent and the acrylic resin film forming agent formed film, and improve the waterproof performance of the concrete.
Further, the composition also comprises 7-10 parts of boron nitride.
By adopting the technical scheme, after the surface of the concrete structure is wounded, the waterproof membrane on the surface of the concrete is damaged, so that the waterproofness of the concrete is deteriorated. When the temperature is increased, the boron nitride and the waterproof membrane structure can conduct the temperature to the interior of the concrete, so that the migration of low-surface-energy substances in the interior of the concrete to the surface of the concrete is promoted, and meanwhile, the increase of the temperature enables the strength of the pyrogallol/iron coordination bond to be reduced, so that the mobility of a cross-linked polymer chain is improved, the self-repairing of a damaged polymer network is promoted, and the hydrophobicity and the strength of the surface of the concrete are repaired.
Further, the coarse aggregate is 5-25mm continuous aggregate pebbles.
By adopting the technical scheme, the pebbles continuously distributed and assembled in the range of 5-25mm are smooth in surface and less in cracks relative to the broken stones, so that the resistance of concrete during mixing can be reduced, the pores in the concrete can be reduced, and the waterproofness of the concrete is improved.
Further, the fine aggregate is natural sand.
Through adopting above-mentioned technical scheme, natural sand granule is perfectly round, smooth, does not pass through mechanical breakage, and surface and inside gap are few, and mechanical properties is excellent, can reduce concrete temple gap, and then reduces the possibility of concrete infiltration.
The second purpose of the invention is to provide a preparation method of the polymer waterproof concrete, which comprises the following steps:
s 1: mixing a polyurethane film-forming agent and an acrylic resin film-forming agent, and uniformly stirring to obtain a film-forming agent for later use;
s 2: dissolving hydroxypropyl methyl cellulose into trichloroethane, adding the solution into water, adding fly ash, mixing uniformly, adding cement, and mixing uniformly to obtain a gel mixture;
s 3: uniformly mixing the coarse aggregate and the fine aggregate to obtain an aggregate mixture;
s 4: and adding the gel mixture into the aggregate mixture while stirring, adding the film-forming agent after uniformly stirring, and uniformly stirring to obtain the polymer waterproof concrete.
By adopting the steps, the hydroxypropyl methyl cellulose is dissolved into the trichloroethane, so that the complete dissolution of the hydroxypropyl methyl cellulose is facilitated, and the possibility of swelling the hydroxypropyl methyl cellulose in water is reduced. After the hydroxypropyl methyl cellulose is dissolved, the fly ash is added, so that the hydroxypropyl methyl cellulose is favorable for attaching the fly ash to a molecular chain, after the cement is added, the hydroxypropyl methyl cellulose molecular chain attached with the fly ash is attached to cement pores, the cement is filled, the strength and the compactness of the cement are enhanced, and the strength and the compactness of the concrete are improved.
The coarse aggregate and the fine aggregate are mixed firstly, which is beneficial to the primary uniform mixing of the aggregates, and the gel mixture is added after the separation, and the gel mixture can adhere and cohere the adhered aggregates mutually and disperse uniformly. Because the waterproof membrane has certain hydrophobicity, the film-forming agent is added after the aggregates are uniformly mixed to form the waterproof membrane in the concrete and on the surface, so that the possibility that the viscosity is reduced because the film-forming agent coats the gel mixture and the mixture respectively before the aggregates are uniformly mixed can be avoided.
Further, in the step s2, respectively dissolving hydroxypropyl methyl cellulose in trichloroethane, uniformly mixing sodium hexametaphosphate and magnesia, adding the mixture into water, uniformly mixing, sequentially adding fly ash and cement, and uniformly mixing to obtain a gel mixture.
By adopting the steps, the sodium hexametaphosphate is hydrolyzed when meeting water, so that the sodium hexametaphosphate is firstly added into the water, the influence of other aggregates is reduced, and more NaH is favorably generated2PO4，NaH2PO4React directly with magnesite in water to form more Mg (H)2PO4)2And is favorable for adhering the internal structure of the concrete in the concrete solidification process.
Further, in the step s1, the pyrogallol modified polymethyl siloxane, the ferric chloride and the titanium dioxide nano particles are added into the polyurethane film forming agent and the acrylic resin film forming agent to be mixed, and the mixture is uniformly stirred to obtain the film forming agent.
By adopting the steps, the pyrogallol/iron coordination bond obtained by compounding the pyrogallol modified polymethyl siloxane, the ferric chloride and the titanium dioxide nano particles is used for enhancing the water resistance of the waterproof film, so that the pyrogallol/iron coordination bond can be directly added into the film forming agent for mixing, and the uniformity of dispersion of the pyrogallol/iron coordination bond in the waterproof film can be improved.
Further, boron nitride is added in the step s1, and then the mixture is stirred uniformly.
By adopting the steps, the mobility of the cross-linked polymer chain of the obtained waterproof membrane is synergistically improved by the coordination bond of boron nitride and the benzenetriol/iron, the repair capability of the waterproof membrane is promoted, and the waterproof property of concrete is favorably prolonged.
In conclusion, the invention has the following beneficial effects:
1. the viscous and slippery hydroxypropyl methyl cellulose can reduce the friction of concrete mixture and is beneficial to improving the slump. The pores among the aggregates are filled, so that the communication of the pores in the concrete is blocked, and the impermeability of the concrete is improved. The polyurethane film forming agent and the acrylic resin film forming agent are compounded to form a viscoelastic hydrophobic film inside and outside the concrete, so that the possibility of water permeating into the concrete when contacting with water is further reduced, and the waterproofness of the concrete is improved;
2. after the hydroxypropyl methyl cellulose is dissolved, the fly ash is added, so that the hydroxypropyl methyl cellulose is favorable for attaching the fly ash to a molecular chain, after the cement is added, the hydroxypropyl methyl cellulose molecular chain attached with the fly ash is attached to cement pores, the cement is filled, the strength and the compactness of the cement are enhanced, and the strength and the compactness of the concrete are improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
The specification and purchase information of the raw materials and components related to the present invention are shown in table 1.
TABLE 1 specification and purchase information of raw materials
The coarse aggregate is detected according to GB/T14685-2011 cobble and coarse aggregate for construction, and the apparent density is 2940kg/m3Bulk density 1785kg/m3The porosity is 34 percent, the mud content is 0.5 percent, and the standard of the coarse aggregate for the building is met.
The fine aggregate is detected according to GB/T14684-2011 building sand, and the apparent density is 2475kg/m3Bulk density 1385kg/m3The void ratio is 36 percent, and the mud content is 0.6 percent.
Example (b):
the components and ratios in the examples are shown in Table 2.
TABLE 2 composition and proportion of polymer waterproof concrete in each example
Examples 1-3 were prepared as follows:
s 1: mixing the polyurethane film-forming agent and the acrylic resin film-forming agent according to the proportion of the table label 2, and uniformly stirring by using a stirrer to obtain the film-forming agent for later use;
s 2: dissolving hydroxypropyl methyl cellulose into trichloroethane at normal temperature, adding the solution into water, adding fly ash, uniformly mixing the mixture through a stirrer, adding cement, and uniformly mixing the mixture to obtain a gel mixture;
s 3: uniformly mixing the coarse aggregate and the fine aggregate by a stirrer to obtain an aggregate mixture;
s 4: and adding the gel mixture into the aggregate mixture while stirring, adding the film-forming agent after uniformly stirring, and uniformly stirring to obtain the polymer waterproof concrete.
Examples 4-5 differ from the preparation of example 1 in that: in the step s2, dissolving hydroxypropyl methyl cellulose into trichloroethane according to the proportion shown in table 2, uniformly mixing sodium hexametaphosphate and magnesia, adding into water, uniformly mixing by a stirrer, sequentially adding fly ash and cement, and uniformly mixing to obtain a gel mixture.
Examples 6-7 differ from the preparation of example 1 in that: in the step s1, pyrogallol modified polymethylsiloxane, ferric chloride and titanium dioxide nanoparticles are added into the polyurethane film-forming agent and the acrylic resin film-forming agent according to the mixture ratio shown in table 2, and the mixture is uniformly stirred to obtain the film-forming agent.
Examples 8-9 differ from example 6 in that: in the step s1, boron nitride is added according to the mixture ratio of the table 2, and then the mixture is stirred uniformly.
Comparative example
The components and the proportions of the polymer waterproof concrete prepared in each proportion are shown in Table 3.
TABLE 3 composition and proportion of polymer waterproof concrete in each proportion
The comparative example 1 differs from the preparation method of example 1 in the following points: in step s2, trichloroethane is added into water, then the fly ash is added and mixed evenly, then cement is added and mixed evenly, and a gel mixture is obtained.
The comparative example 2 differs from the preparation method of example 1 in the following points: step s1 is absent.
The comparative example 3 differs from the preparation method of example 1 in the following points: and step s1, only adding the acrylic resin film-forming agent to obtain the film-forming agent for later use.
Comparative example 4 differs from the preparation of example 1 in the following way: and step s1, only adding the polyurethane film forming agent to obtain the film forming agent for later use.
The comparative example 5 differs from the preparation method of example 1 in the following points: in step s2, hydroxypropyl methyl cellulose is directly added into water, then the fly ash is added and mixed evenly, then the cement is added and mixed evenly, and a gel mixture is obtained.
Performance detection
The performance test method of the polymer waterproof concrete prepared in the above examples and comparative examples is as follows:
1. slump: and (3) respectively testing the slump of the concrete mixture when the concrete mixture is taken out of the machine according to GB/T50080-2016 standard of common concrete mixture performance test method.
2. Strength: a standard test block is manufactured according to GB/T50081-2002 standard of common concrete mechanical property test method, and the 28-day compressive strength of the standard test block is measured.
3. Water penetration resistance: and (3) testing the water penetration depth of the concrete standard test block according to a step-by-step pressurization method in GB/T50082-2009 'test method standard for long-term performance and durability of common concrete'.
4. The cement loss rate: the resulting cement loss was tested according to DL/T5117-2000, test procedure for UnSettled concrete underwater.
The results of the performance tests of the polymer waterproof concrete prepared in the above examples are shown in table 4.
TABLE 4 results of performance test of polymer waterproof concrete prepared in each example
The concrete prepared according to the above comparative examples was tested in the same manner as in the examples, and the test results are shown in Table 5.
TABLE 5 Performance test results for the concretes prepared in each proportion
From the above data, it can be seen that:
the slump of the polymer waterproof concrete prepared in the examples 1-9 is far greater than that of the concrete prepared in the comparative example 1, the strength of the concrete prepared in the comparative example 1 is smaller than that of the concrete prepared in the examples 1-9, and the water penetration depth is greater than that of the concrete prepared in the examples 1-9, so that the promotion effect of the viscous-sliding hydroxypropyl methyl cellulose on the workability of the concrete is shown, and the promotion effect of the adhesion of the fly ash to fill the pores of cement particles and aggregates on the strength and the impermeability of the concrete is shown. However, the slump of examples 1 to 3 gradually decreased, indicating that an excessive content of hydroxypropylmethylcellulose resulted in an excessive viscosity, which was disadvantageous in workability of concrete.
Compared with the polymer waterproof concrete prepared in the example 1, the slump and strength of the polymer waterproof concrete are not changed greatly, and the water seepage depth and the cement loss rate are reduced, so that the fact that the polyurethane film forming agent and the acrylic resin film forming agent are compounded, a waterproof film is formed inside and on the surface of the concrete after solidification, the influence of the workability and the strength of the concrete is small, and the waterproofness of the concrete can be improved. In example 5, as compared with example 4, it is found that the polyurethane film-forming agent is 5 to 10 parts by weight and the acrylic resin film-forming agent is 3 to 5 parts by weight, which promotes the water repellency. Compared with the example 1, the comparative examples 2 to 4 show that the effect of the polyurethane film forming agent and the acrylic resin film forming agent which are independently added on the waterproofness of the concrete is smaller than the effect of the polyurethane film forming agent and the acrylic resin film forming agent which are compounded.
Compared with the polymer waterproof concrete prepared in the embodiment 1, the polymer waterproof concrete prepared in the embodiment 6-7 has the advantages of small slump and strength change, small water penetration depth and small cement loss rate, and shows that the compounding of the phloroglucinol modified polymethyl siloxane, the ferric chloride and the titanium dioxide nano particles has a promoting effect on the waterproofness of the concrete.
The polymer waterproof concrete prepared in the examples 8 to 9 has higher slump and strength compared with the concrete prepared in the example 6, and shows that the addition of boron nitride has an effect of promoting the strength and the workability of the concrete; meanwhile, the water penetration depth is reduced, which shows that the boron nitride plays a role in promoting the waterproofness of the concrete.
In comparative example 5, it can be seen that, compared with example 1, hydroxypropylmethylcellulose is more soluble in trichloroethane, which is advantageous in improving the strength and water resistance of concrete.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, 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 invention.
Claims (10)
1. The polymer waterproof concrete is characterized by comprising the following compositions in parts by weight: 630-650 parts of coarse aggregate, 585-610 parts of fine aggregate, 430-450 parts of cement, 210-230 parts of water, 30-35 parts of fly ash, 20-25 parts of hydroxypropyl methyl cellulose, 80 parts of trichloroethane, 12-15 parts of polyurethane film forming agent and 8-10 parts of acrylic resin film forming agent.
2. The polymer waterproof concrete according to claim 1, wherein the composition further comprises 5 to 10 parts of sodium hexametaphosphate and 3 to 5 parts of magnesite.
3. The polymer waterproof concrete according to claim 1, wherein the composition further comprises 10-15 parts of pyrogallol-modified polymethylsiloxane, 5-10 parts of ferric chloride and 3-8 parts of titanium dioxide nanoparticles.
4. The polymer waterproof concrete according to claim 3, characterized in that the composition further comprises 7-10 parts of boron nitride.
5. The polymer waterproof concrete according to claim 1, wherein the coarse aggregate is 5-25mm continuous aggregate pebbles.
6. The polymer waterproof concrete according to claim 1, wherein the fine aggregate is natural sand.
7. A method of preparing the polymer waterproof concrete according to claim 1, characterized by comprising the steps of:
s 1: mixing a polyurethane film-forming agent and an acrylic resin film-forming agent, and uniformly stirring to obtain a film-forming agent for later use;
s 2: dissolving hydroxypropyl methyl cellulose into trichloroethane, adding the solution into water, adding fly ash, mixing uniformly, adding cement, and mixing uniformly to obtain a gel mixture;
s 3: uniformly mixing the coarse aggregate and the fine aggregate to obtain an aggregate mixture;
s 4: and adding the gel mixture into the aggregate mixture while stirring, adding the film-forming agent after uniformly stirring, and uniformly stirring to obtain the polymer waterproof concrete.
8. The method for preparing polymer waterproof concrete according to claim 7, wherein in the step s2, hydroxypropyl methyl cellulose is dissolved in trichloroethane, sodium hexametaphosphate and magnesia are uniformly mixed and then added into water, and after uniform mixing, fly ash and cement are sequentially added and uniformly mixed, so that a gel mixture is obtained.
9. The preparation method of the polymer waterproof concrete according to claim 7, wherein in the step s1, the pyrogallol-modified polymethylsiloxane, the ferric chloride and the titanium dioxide nanoparticles are added into the polyurethane film-forming agent and the acrylic resin film-forming agent to be mixed, and the mixture is uniformly stirred to obtain the film-forming agent.
10. The method for preparing polymer waterproof concrete according to claim 8, wherein boron nitride is added in the step s1 and then the mixture is stirred uniformly.
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| CN112778846A (en) * | 2021-01-11 | 2021-05-11 | 上海伟星新材料科技有限公司 | Self-repairing polymer cement waterproof coating |
| CN115650654A (en) * | 2022-10-31 | 2023-01-31 | 常州市水利规划设计院有限公司 | Anti-blocking permeable concrete and preparation method thereof |
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| CN115650654A (en) * | 2022-10-31 | 2023-01-31 | 常州市水利规划设计院有限公司 | Anti-blocking permeable concrete and preparation method thereof |
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Application publication date: 20201120 |