CN112876174B - Preparation method of waterproof and impervious concrete - Google Patents
Preparation method of waterproof and impervious concrete Download PDFInfo
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- CN112876174B CN112876174B CN202110278178.2A CN202110278178A CN112876174B CN 112876174 B CN112876174 B CN 112876174B CN 202110278178 A CN202110278178 A CN 202110278178A CN 112876174 B CN112876174 B CN 112876174B
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A preparation method of waterproof and impervious concrete comprises the following steps: weighing 30-40 parts by weight of diphenyldimethoxysilane and 10-20 parts by weight of phenyl alkylsulfonate, adding the mixture into a pressure kettle, raising the temperature to 70-80 ℃, stirring for 10-15 minutes at the rotating speed of 200-300 r/min, adding 50-60 parts by weight of benzaldehyde and 5-10 parts by weight of N-methyl-2-pyrrolidone after mixing, raising the temperature to 90-100 ℃, controlling the pressure to be 0.15-0.2MPa, keeping the temperature and pressure for 20-30 minutes, then slowly returning to the normal pressure, reducing the temperature to 50-60 ℃, slowly adding 10-15 parts by weight of triethylene glycol diisocaprylate dropwise at the dropping speed of 5-10ml/min, stirring while dropping to obtain a penetrant, and effectively permeating the penetrant into concrete to form a membrane with very low surface tension, can be uniformly distributed on the pore wall of the silicate material, and promotes the precipitation and crystallization of the waterproof agent which takes the organic silicon modified polyacrylate and the vinyl propionate as main raw materials, and the generated crystals are fused with crystals formed by the hydration of cement.
Description
Technical Field
The invention relates to a preparation method of waterproof and anti-permeability concrete, and belongs to the technical field of concrete.
Background
The foam concrete and the aerated concrete have the characteristics of light weight, heat preservation and insulation, sound absorption and insulation, fire prevention and non-combustion, and the like, but the light porous concrete has high porosity and large surface free energy, is easy to reduce the strength and the heat preservation performance due to water absorption, and has poor freezing resistance and durability. Particularly, the surface water absorption easily causes the drying shrinkage rate of concrete to rise, the binding force with plastering mortar is reduced, and further the wall is caused to hollow, mould, crack, fall off in large area and the like, the waterproof layer has the phenomenon that the surface of a micropore is easy to fall off and age, the local water absorption phenomenon is caused, and the performance of the concrete material is reduced. There is room for further improvement in the water-repellent property of the water-repellent agent itself and, compounded therewith, in enhancing its dispersibility and adhesion strength to a substrate.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to ensure waterproof and impervious concrete.
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 30-40 parts by weight of diphenyldimethoxysilane and 10-20 parts by weight of phenyl alkylsulfonate, adding the mixture into a pressure kettle, raising the temperature to 70-80 ℃, stirring for 10-15 minutes at the rotating speed of 200-300 r/min, adding 50-60 parts by weight of benzaldehyde and 5-10 parts by weight of N-methyl-2-pyrrolidone after mixing, raising the temperature to 90-100 ℃, controlling the pressure to be 0.15-0.2MPa, keeping the temperature and pressure for 20-30 minutes, then slowly returning to normal pressure, reducing the temperature to 50-60 ℃, slowly adding 10-15 parts by weight of triethylene glycol diisocaprylate at the dropping speed of 5-10ml/min, stirring while dropping to obtain a penetrant,
(2) weighing 10-15 parts by weight of organic silicon modified polyacrylate, 5-7 parts by weight of vinyl propionate, 5-7 parts by weight of nonylphenol polyoxyethylene ether and 90-120 parts by weight of acetone, stirring for 5-10min at the rotating speed of 150r/min under the water bath condition of 50-60 ℃ to obtain the waterproof agent,
(3) weighing 100 parts by weight of portland cement, 10-30 parts by weight of silica fume, 10-15 parts by weight of allophane, 5-10 parts by weight of lime, 250 parts by weight of fine aggregate, 300 parts by weight of coarse aggregate, 350 parts by weight of aluminum powder, 5-8 parts by weight of polyethylene fiber and 5-6 parts by weight of water reducing agent, adding the mixture into a stirrer, stirring for 5 minutes, adding 30-40 parts by weight of water, uniformly stirring and standing for 10-15 minutes;
(4) and (4) adding 5-10 parts of penetrant and 10-20 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
As a preferred limitation, the preparation method of the waterproof and impervious concrete is characterized in that the cement is P.O42.5 ordinary portland cement,
as a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the fine aggregate is river sand, and the sand rate is 35-40%.
As a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the coarse aggregate is stone, and the particle size is controlled to be 5-20 mm.
As a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the silica fume is high-activity silica fume, and the content of SiO2 in the silica fume is more than 90 percent.
As a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the mass ratio of the penetrant to the waterproof agent is 1: 1.5-2.
As a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the water bath temperature is controlled at 60 ℃, and the stirring is carried out for 10min at the rotating speed of 150 r/min.
As a preferred definition, the method for preparing the waterproof and impervious concrete is characterized in that the length of the polyethylene fiber is about 2 to 3 mm.
As a preferable limitation, the preparation method of the waterproof and impervious concrete is characterized in that the pressure is controlled to be 0.15MPa, the temperature and pressure are kept for 20 minutes,
preferably, the preparation method of the waterproof and impervious concrete is characterized in that the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
The preparation method of the waterproof and impervious concrete comprises the following steps:
(1) weighing 30-40 parts by weight of diphenyldimethoxysilane and 10-20 parts by weight of phenyl alkylsulfonate, adding the mixture into a pressure kettle, raising the temperature to 70-80 ℃, stirring for 10-15 minutes at the rotating speed of 200-300 r/min, adding 50-60 parts by weight of benzaldehyde and 5-10 parts by weight of N-methyl-2-pyrrolidone after mixing, raising the temperature to 90-100 ℃, controlling the pressure to be 0.15-0.2MPa, keeping the temperature and pressure for 20-30 minutes, then slowly returning to normal pressure, reducing the temperature to 50-60 ℃, slowly adding 10-15 parts by weight of triethylene glycol diisocaprylate at the dropping speed of 5-10ml/min, stirring while dropping to obtain a penetrant,
(2) weighing 10-15 parts by weight of organic silicon modified polyacrylate, 5-7 parts by weight of vinyl propionate, 5-7 parts by weight of nonylphenol polyoxyethylene ether and 90-120 parts by weight of acetone, stirring for 5-10min at the rotating speed of 150r/min under the water bath condition of 50-60 ℃ to obtain the waterproof agent,
(3) weighing 100 parts by weight of portland cement, 10-30 parts by weight of silica fume, 10-15 parts by weight of allophane, 5-10 parts by weight of lime, 250 parts by weight of fine aggregate, 300 parts by weight of coarse aggregate, 350 parts by weight of aluminum powder, 5-8 parts by weight of polyethylene fiber and 5-6 parts by weight of water reducing agent, adding the mixture into a stirrer, stirring for 5 minutes, adding 30-40 parts by weight of water, uniformly stirring and standing for 10-15 minutes;
(4) and (3) adding 5-10 parts of penetrant and 10-20 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
The penetrant of the invention effectively permeates into concrete, a formed film has very low surface tension and can be uniformly distributed on the hole wall of a silicate material, and the penetrant promotes the precipitation and crystallization of a waterproofing agent which takes organic silicon modified polyacrylate and vinyl propionate as main raw materials, the generated crystal is fused with a crystal formed by hydration of cement, the compatibility between the crystals is good, and the crystals and the crystal are finally fused with a matrix into a whole, the capillary channel is sealed, and the pores and the capillary channels of the concrete are filled, so that the water permeability of the concrete or the water permeability under hydrostatic pressure is reduced, the contact between the interior of the concrete and external moisture is isolated, the compactness of the concrete is increased, and the impermeability of the concrete is improved.
Detailed Description
Example 1
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 35 parts of diphenyldimethoxysilane and 15 parts of phenyl alkylsulfonate, adding into a pressure kettle, raising the temperature to 70 ℃, stirring for 10 minutes at the rotating speed of 200r/min, adding 50 parts of benzaldehyde and 5 parts of N-methyl-2-pyrrolidone after mixing, raising the temperature to 100 ℃, controlling the pressure to be 0.15MPa, keeping the temperature and the pressure for 25 minutes, then slowly recovering to the normal pressure, reducing the temperature to 50 ℃, slowly dropwise adding 10 parts of triethylene glycol diisocaprylate at the dropwise adding speed of 5ml/min, stirring while dropwise adding to obtain a penetrant,
(2) weighing 15 parts of organic silicon modified polyacrylate, 6 parts of vinyl propionate, 5 parts of nonylphenol polyoxyethylene ether and 100 parts of acetone, stirring for 5min at the rotating speed of 120r/min under the water bath condition of 60 ℃ to obtain the waterproof agent,
(3) weighing 100 parts of portland cement, 30 parts of silica fume, 10 parts of allophane, 5 parts of lime, 220 parts of fine aggregate, 310 parts of coarse aggregate, 5 parts of aluminum powder, 8 parts of polyethylene fiber and 5 parts of water reducing agent, adding into a stirrer, stirring for 5 minutes, adding 40 parts of water, uniformly stirring, and standing for 15 minutes;
(4) and (3) adding 10 parts of penetrant and 20 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
Example 1 a waterproof and impervious concrete was prepared according to the method of preparation of waterproof and impervious concrete.
Example 2
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 38 parts of diphenyldimethoxysilane and 12 parts of phenyl alkylsulfonate, adding into a pressure kettle, heating to 80 ℃, stirring at the rotating speed of 250r/min for 10 minutes, mixing, adding 50 parts of benzaldehyde and 7 parts of N-methyl-2-pyrrolidone, heating to 95 ℃, controlling the pressure at 0.2MPa, keeping the temperature and pressure for 25 minutes, slowly returning to normal pressure, reducing the temperature to 60 ℃, slowly adding 10 parts of triethylene glycol diisocaprylate dropwise at the dropping speed of 8ml/min, stirring while adding to obtain a penetrant,
(2) weighing 15 parts of organic silicon modified polyacrylate, 7 parts of vinyl propionate, 7 parts of nonylphenol polyoxyethylene ether and 90 parts of acetone, stirring for 5min at the rotating speed of 110r/min under the water bath condition of 55 ℃ to obtain the waterproof agent,
(3) weighing 100 parts of portland cement, 20 parts of silica fume, 12 parts of allophane, 7 parts of lime, 230 parts of fine aggregate, 350 parts of coarse aggregate, 5 parts of aluminum powder, 8 parts of polyethylene fiber and 6 parts of water reducing agent, adding into a stirrer, stirring for 5 minutes, adding 35 parts of water, uniformly stirring, and standing for 12 minutes;
(4) and (4) adding 8 parts of penetrant and 12 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
Example 2 a waterproof and impervious concrete prepared by the method of preparation of waterproof and impervious concrete.
Example 3
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 40 parts of diphenyldimethoxysilane and 15 parts of phenyl alkylsulfonate, adding into a pressure kettle, raising the temperature to 70 ℃, stirring for 12 minutes at the rotating speed of 300r/min, adding 52 parts of benzaldehyde and 9 parts of N-methyl-2-pyrrolidone after mixing, raising the temperature to 95 ℃, controlling the pressure to be 0.15MPa, keeping the temperature and the pressure for 25 minutes, slowly returning to the normal pressure, reducing the temperature to 50 ℃, slowly dropwise adding 14 parts of triethylene glycol diisocaprylate at the dropwise adding speed of 8ml/min, stirring while dropwise adding to obtain a penetrant,
(2) weighing 14 parts of organic silicon modified polyacrylate, 7 parts of vinyl propionate, 6 parts of nonylphenol polyoxyethylene ether and 110 parts of acetone, stirring for 10min at a rotating speed of 150r/min under the water bath condition of 50 ℃ to obtain the waterproof agent,
(3) weighing 100 parts of portland cement, 25 parts of silica fume, 12 parts of allophane, 5 parts of lime, 250 parts of fine aggregate, 350 parts of coarse aggregate, 5 parts of aluminum powder, 5 parts of polyethylene fiber and 5 parts of water reducing agent, adding into a stirrer, stirring for 5 minutes, adding 40 parts of water, stirring uniformly, and standing for 15 minutes;
(4) and (3) adding 6 parts of penetrant and 11 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
Example 3 a waterproof and impervious concrete prepared by the method of preparation of waterproof and impervious concrete.
Example 4
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 40 parts of diphenyldimethoxysilane and 20 parts of phenyl alkylsulfonate, adding into a pressure kettle, raising the temperature to 80 ℃, stirring for 15 minutes at the rotating speed of 280r/min, adding 60 parts of benzaldehyde and 9 parts of N-methyl-2-pyrrolidone after mixing, raising the temperature to 100 ℃, controlling the pressure to be 0.18MPa, keeping the temperature and the pressure for 30 minutes, then slowly recovering to the normal pressure, reducing the temperature to 60 ℃, slowly dropwise adding 15 parts of triethylene glycol diisocaprylate at the dropwise adding speed of 9ml/min, stirring while dropwise adding to obtain a penetrant,
(2) weighing 15 parts of organic silicon modified polyacrylate, 5 parts of vinyl propionate, 6 parts of nonylphenol polyoxyethylene ether and 105 parts of acetone, stirring at the rotating speed of 150r/min for 10min under the water bath condition of 50 ℃ to obtain the waterproof agent,
(3) weighing 100 parts of portland cement, 20 parts of silica fume, 12 parts of allophane, 9 parts of lime, 210 parts of fine aggregate, 340 parts of coarse aggregate, 5 parts of aluminum powder, 8 parts of polyethylene fiber and 6 parts of water reducing agent, adding into a stirrer, stirring for 5 minutes, adding 32 parts of water, uniformly stirring, and standing for 10 minutes;
(4) and (3) adding 9 parts of penetrant and 16 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
Example 4 a waterproof and impervious concrete prepared by the method of preparation of waterproof and impervious concrete.
Example 5
A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 30 parts of diphenyldimethoxysilane and 10 parts of phenyl alkylsulfonate, adding into a pressure kettle, raising the temperature to 80 ℃, stirring for 15 minutes at the rotating speed of 200r/min, adding 60 parts of benzaldehyde and 7 parts of N-methyl-2-pyrrolidone after mixing, raising the temperature to 100 ℃, controlling the pressure to be 0.2MPa, keeping the temperature and the pressure for 25 minutes, slowly returning to the normal pressure, reducing the temperature to 50 ℃, slowly dropwise adding 10 parts of triethylene glycol diisocaprylate at the dropwise adding speed of 5ml/min, stirring while dropwise adding to obtain a penetrant,
(2) weighing 10 parts of organic silicon modified polyacrylate, 6 parts of vinyl propionate, 6 parts of nonylphenol polyoxyethylene ether and 120 parts of acetone, stirring for 8min at the rotating speed of 120r/min under the water bath condition of 55 ℃ to obtain the waterproof agent,
(3) weighing 100 parts of portland cement, 30 parts of silica fume, 10 parts of allophane, 7 parts of lime, 250 parts of fine aggregate, 320 parts of coarse aggregate, 5 parts of aluminum powder, 8 parts of polyethylene fiber and 5 parts of water reducing agent, adding into a stirrer, stirring for 5 minutes, adding 40 parts of water, uniformly stirring, and standing for 10 minutes;
(4) and (3) adding 8 parts of penetrant and 16 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
Example 5A waterproof and impervious concrete was prepared by the method described in example 5.
Comparative example 1
The concrete of comparative example 1 was different from example 1 in that no penetrant was added, and the other steps were the same as in example 1.
Comparative example 2
The concrete of comparative example 2 was the same as that of example 1 except that no penetrant or waterproofing agent was added, and the other steps were the same.
And testing the compression strength, penetration height, water penetration depth, 48-hour water absorption capacity ratio and anti-seepage pressure of the concrete according to GB/T50081-2016 standard of test method for mechanical property of common concrete and GB/T50082-2009 standard of test method for long-term property and durability of common concrete.
| Penetration height ratio% | 48-hour water absorption rate% | Impervious depth mm | Resistance to osmotic pressure MPa | 7d compressive strength MPa | 28d compressive strength MPa | |
| Example 1 | 10 | 35 | 3.9 | 1.87 | 33.5 | 47.9 |
| Example 2 | 11 | 37 | 4.0 | 1.90 | 34.2 | 46.3 |
| Example 3 | 12 | 40 | 3.8 | 1.89 | 32.7 | 44.9 |
| Example 4 | 10 | 38 | 4.0 | 1.90 | 34.5 | 45.2 |
| Example 5 | 10 | 41 | 3.9 | 1.85 | 32.1 | 47.1 |
| Comparative example 1 | 15 | 54 | 7.6 | 1.53 | 30.5 | 43.6 |
| Comparative example 2 | 22 | 75 | 10.5 | 1.34 | 27.4 | 39.4 |
As can be seen from examples 1 to 5 and comparative examples 1 to 2, not only the effect of permeation and water resistance is excellent, but also the compressive strength is remarkably improved, as compared with comparative example 2 in which the water repellent and the penetrant are not added and comparative example 1 in which the water repellent is added alone. The anti-seepage and waterproof effects mainly come from the mutual combination of the waterproof agent and the penetrating agent, and the full filling and sealing of micropores. Thereby improving the overall application efficiency of the waterproofing agent and generating the effect that one plus one is more than two.
Claims (9)
1. A preparation method of waterproof and impervious concrete comprises the following steps:
(1) weighing 30-40 parts by weight of diphenyldimethoxysilane and 10-20 parts by weight of phenyl alkylsulfonate, adding the mixture into a pressure kettle, raising the temperature to 70-80 ℃, stirring for 10-15 minutes at the rotating speed of 200-300 r/min, adding 50-60 parts by weight of benzaldehyde and 5-10 parts by weight of N-methyl-2-pyrrolidone after mixing, raising the temperature to 90-100 ℃, controlling the pressure to be 0.15-0.2MPa, keeping the temperature and pressure for 20-30 minutes, then slowly returning to normal pressure, reducing the temperature to 50-60 ℃, slowly adding 10-15 parts by weight of triethylene glycol diisocaprylate at the dropping speed of 5-10ml/min, stirring while dropping to obtain a penetrant,
(2) weighing 10-15 parts by weight of organic silicon modified polyacrylate, 5-7 parts by weight of vinyl propionate, 5-7 parts by weight of nonylphenol polyoxyethylene ether and 90-120 parts by weight of acetone, stirring for 5-10min at the rotating speed of 150r/min under the water bath condition of 50-60 ℃ to obtain the waterproof agent,
(3) weighing 100 parts by weight of portland cement, 10-30 parts by weight of silica fume, 10-15 parts by weight of allophane, 5-10 parts by weight of lime, 250 parts by weight of fine aggregate, 300 parts by weight of coarse aggregate, 350 parts by weight of aluminum powder, 5-8 parts by weight of polyethylene fiber and 5-6 parts by weight of water reducing agent, adding the mixture into a stirrer, stirring for 5 minutes, adding 30-40 parts by weight of water, uniformly stirring and standing for 10-15 minutes;
(4) and (3) adding 5-10 parts of penetrant and 10-20 parts of waterproofing agent into the stirrer in the step (3), uniformly stirring, standing, pouring into a mold, and demolding and maintaining for 14 days after curing.
2. The method for preparing waterproof and impervious concrete according to claim 1, wherein said cement is p.o42.5 Portland cement.
3. The method for preparing waterproof and impervious concrete according to claim 1, wherein said coarse aggregate is stone and the particle size is controlled to be 5-20 mm.
4. The method for preparing waterproof and impervious concrete according to claim 1, wherein said silica fume is highly reactive silica fume of SiO2The content is more than 90 percent.
5. The method for preparing waterproof and impervious concrete according to claim 1, wherein the mass ratio of the penetrant to the waterproofing agent is 1: 1.5-2.
6. The method for preparing waterproof and impervious concrete according to claim 1, wherein the temperature of the water bath is controlled at 60 ℃ and the stirring is carried out for 10min at a rotating speed of 150 r/min.
7. The method for preparing waterproof and impervious concrete according to claim 1, wherein said polyethylene fiber has a length of 2-3 mm.
8. The method for preparing waterproof and impervious concrete according to claim 1, wherein the pressure is controlled to be 0.15MPa, and the temperature and pressure are kept for 20 minutes.
9. The method for preparing waterproof and impervious concrete according to claim 1, wherein the water reducing agent is a polycarboxylic acid high efficiency water reducing agent.
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| US11623895B2 (en) * | 2014-01-22 | 2023-04-11 | The Euclid Chemical Company | Water-repellent concrete admixture |
| CN107188602A (en) * | 2017-06-03 | 2017-09-22 | 合肥佳洋电子科技有限公司 | A kind of impervious strong concrete building block and preparation method thereof |
| CN111995320B (en) * | 2020-08-14 | 2022-05-10 | 北京泽华路桥工程有限公司 | Impervious concrete and preparation method thereof |
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