CN110550913A - Impervious concrete and preparation process thereof - Google Patents
Impervious concrete and preparation process thereof Download PDFInfo
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- CN110550913A CN110550913A CN201910970912.4A CN201910970912A CN110550913A CN 110550913 A CN110550913 A CN 110550913A CN 201910970912 A CN201910970912 A CN 201910970912A CN 110550913 A CN110550913 A CN 110550913A
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
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- Ceramic Engineering (AREA)
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Abstract
the invention discloses impervious concrete and a preparation process thereof, relates to the technical field of concrete, and solves the problem of poor integral impermeability of the concrete due to the fact that a large number of gaps and communicated capillaries are easily formed in the concrete. The impervious concrete comprises the following components in parts by weight: 180 portions of water and 220 portions of water; 400 portions of stone; 700 portions of medium sand and 800 portions; 240 portions and 260 portions of Portland cement; 90-100 parts of mineral powder; 40-70 parts of ultrafine fly ash; 60-100 parts of modified metakaolin; 3-5 parts of a water reducing agent; 15-25 parts of reinforcing filler. The impervious concrete has compact internal structure, less internal gaps and communicated capillaries and good impermeability.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to impervious concrete and a preparation process thereof.
background
the concrete is cement concrete which is prepared by mixing cement as a cementing material, sand and stone as aggregates, water, an additive and an admixture according to a certain proportion and stirring, and is also called ordinary concrete, and is widely applied to civil engineering.
the invention discloses an environment-friendly antifreezing concrete and a preparation method thereof in a Chinese patent with the publication number of CN110117179A, wherein the environment-friendly antifreezing concrete comprises the following components in parts by weight: 260 parts of 240-containing cement, 200 parts of 180-containing water, 870 parts of 850-containing broken stone, 790 parts of 770-containing medium sand, 60-80 parts of mineral powder, 50-70 parts of fly ash, 4.36-10.36 parts of additive, 1.25-3.25 parts of antifreeze agent, 30-45 parts of waste concrete particles, 15-25 parts of waste rubber particles, 1.5-3.5 parts of water-based acrylate, 10-15 parts of epoxy resin and 8.6-10.6 parts of polyurethane particles; the antifreeze agent is prepared from the following components: polyethylene glycol, water, polydextrose, gelatin agar and guar gum.
In the above application documents, by adding the waste concrete particles and the waste rubber particles, the influence of the waste concrete and the waste rubber on the pollution alleviation is alleviated, but a large number of micro cracks exist on the surface of the waste concrete particles, and the surface of the waste rubber particles is basically seriously aged, so that the associativity between the waste concrete particles and other component raw materials is greatly reduced, a large number of gaps and communicated capillaries are easily formed inside the concrete, and the integral impermeability of the concrete is poor, therefore, a new scheme needs to be provided to solve the above problems.
disclosure of Invention
Aiming at the problem that the whole impermeability is poor due to the fact that a large number of gaps and communicated capillaries are easily formed in concrete in the prior art, the invention aims to provide impermeable concrete to solve the technical problem, and the whole impermeable concrete has good impermeability.
In order to achieve the first purpose, the invention provides the following technical scheme:
The impervious concrete comprises the following components in parts by weight:
180 portions of water and 220 portions of water;
400 portions of stone;
700 portions of medium sand and 800 portions;
240 portions and 260 portions of Portland cement;
90-100 parts of mineral powder;
40-70 parts of ultrafine fly ash;
60-100 parts of modified metakaolin;
3-5 parts of a water reducing agent;
15-25 parts of reinforcing filler.
By adopting the technical scheme, the water reducing agent is a concrete admixture capable of reducing the mixing water consumption under the condition of maintaining the slump of the retarded concrete basically unchanged. The reinforced filler has good structural strength, good dispersibility in the impervious concrete and good compatibility with raw materials of various components, thereby greatly improving the overall performance of the impervious concrete. The mineral powder can effectively improve the compressive strength of the impervious concrete, reduce the cost of the impervious concrete, inhibit the reaction of alkali aggregate, reduce the hydration heat, reduce the early temperature cracks of the impervious concrete structure, improve the compactness of the impervious concrete and have obvious effects on improving the seepage resistance and the erosion resistance.
The modified metakaolin is prepared by modifying metakaolin through a polymer, the pore distribution in concrete can be obviously reduced, and active alumina in the modified metakaolin consumes calcium hydroxide to generate products such as gel and the like, so that large-grain crystal products such as calcium hydroxide in impervious concrete are reduced, and the products such as finer gel and the like are replaced, and further, the pores in a concrete structure are reduced. Meanwhile, the modified metakaolin and the ultrafine fly ash can play a good compounding effect, so that crystal grains of a hydration product in concrete become fine, and finer pores are formed in the hydration product, and the modified metakaolin and the ultrafine fly ash play a remarkable synergistic effect of micro powder filling, so that the internal structure of the impervious concrete is more compact, the internal pores and communicated capillaries are greatly reduced, and the impervious concrete has good impermeability.
More preferably, the impervious concrete is also added with 3-8 parts by weight of waste polypropylene fiber.
Through adopting above-mentioned technical scheme, the pore size distribution of impervious concrete can effectively be improved in the addition of old and useless polypropylene fibre, because old and useless polypropylene is spacing to be three-dimensional in the impervious concrete in disorder to the distribution, can refine the thick hole in the structure to make the inner structure of impervious concrete more closely knit, the capillary of inside space and UNICOM significantly reduces, has improved the inside pore structure of impervious concrete, not only can improve the holistic structural strength of impervious concrete, can also improve the holistic impermeability of impervious concrete. Meanwhile, the utilization of the waste polypropylene fibers is beneficial to saving natural resources and reasonably utilizing the resources.
More preferably, the length of the waste polypropylene fiber is 12-19mm, and the diameter of the waste polypropylene fiber is 5-10 μm.
By adopting the technical scheme, when the length of the waste polypropylene fiber is within the range of 12-19mm and the diameter is within the range of 5-10 mu m, the waste polypropylene fiber can be better and uniformly dispersed in the impervious concrete and effectively filled in the gap inside the impervious concrete, so that the impervious concrete keeps good and stable impermeability and higher structural strength.
Preferably, the impervious concrete is further added with 2-5 parts by weight of functional additives, the functional additives are composed of calcium sulphoaluminate and silica fume, and the weight ratio of the calcium sulphoaluminate to the silica fume is 1: (2-3).
By adopting the technical scheme, the calcium sulphoaluminate is a good expanding agent, can improve the compactness of the internal structure of the concrete and reduce the shrinkage of the concrete, thereby improving the integral impermeability of the impermeable concrete. The silica fume is a volcanic ash substance with large specific surface area and high activity, and can improve the integral structural density and strength of the impervious concrete. And calcium sulphoaluminate and silica fume are mixed to be used as functional additives, so that non-communicated bubbles can be generated in the impervious concrete, a capillary channel is cut off, and a pore structure is changed, so that the impermeability of the impervious concrete is improved.
More preferably, the water reducing agent is any one of sodium lignosulfonate, sodium sulfite, tannin and sugar calcium.
By adopting the technical scheme, the sodium lignosulfonate, the sodium sulfite, the tannin and the calcium saccharate are good water reducing agents, and the raw materials of each component of the anti-seepage concrete have good dispersion effect, so that the unit water consumption can be reduced, the fluidity of the anti-seepage concrete is improved, and the compactness of the anti-seepage concrete is improved. Meanwhile, when a plurality of water reducing agents are mixed for use, the bleeding rate of the impervious concrete can be reduced, the stability is good, and the good and stable impervious capability is kept.
Preferably, the reinforcing filler is selected from one or more of quartz powder, silicon carbide, silicon nitride, corundum powder, aluminum silicate fiber and glass fiber.
by adopting the technical scheme, the quartz powder, the silicon carbide, the silicon nitride, the corundum powder, the aluminum silicate fiber and the glass fiber are good reinforcing agents, have good dispersibility in the impervious concrete, and have good bonding property with raw materials of all components, so that the overall structural strength of the impervious concrete after curing and forming is greatly improved. Meanwhile, the reinforcing agent has good strength and filling property, so that the overall compactness and impact strength of the impervious concrete are greatly improved.
the second purpose of the invention is to provide a preparation process of impervious concrete, and the impervious concrete prepared by the process has good impermeability.
In order to achieve the second purpose, the invention provides the following technical scheme:
Step one, stirring and mixing Portland cement, medium sand, stones, mineral powder, ultrafine fly ash and modified metakaolin in corresponding parts by weight to form a mixture;
Adding the reinforcing filler in corresponding parts by weight into the mixture, and fully mixing to obtain a base material;
adding water reducing agents in corresponding weight parts into water, and fully mixing to form a mixed solution;
and step four, pouring the base materials into the mixed solution for multiple times, and continuously stirring and mixing to obtain the impervious concrete.
By adopting the technical scheme, the process for preparing the impervious concrete is simpler to operate, and the components can be quickly and uniformly mixed, so that the impervious concrete has higher production efficiency, and the overall quality can be ensured. Meanwhile, the method is beneficial to greatly reducing the internal gaps of the concrete and communicated capillaries, so that the obtained impervious concrete has higher compactness and good impermeability, and the whole body has good application effect.
more preferably, in the first step, the modified metakaolin is prepared by the following steps:
S1, placing metakaolin into a container, adding 4-6 times of polyacrylic acid solution, adjusting the pH to 3-4, controlling the temperature to be 25-35 ℃, reacting for 10-12h, and stirring by using a stirrer in the reaction process to obtain a mixed solution;
S2, carrying out vacuum filtration on the mixed solution to obtain a precipitate, then placing the precipitate in a drying oven at the temperature of 60-80 ℃ for drying, leaching with ethanol, then placing in the drying oven at the temperature of 60-80 ℃ for drying, and grinding to obtain the modified metakaolin.
by adopting the technical scheme, the metakaolin is modified by the polyacrylic acid solution, and the long-chain comb-shaped configuration and the characteristic groups of the polyacrylic acid are utilized to facilitate the metakaolin particles to generate directional adsorption, so that the obtained modified metakaolin has good dispersibility, has good associativity with other raw materials of various components, can play a good filling and blocking role on internal gaps and communicated capillaries of concrete, and further greatly improves the integral impermeability of the impermeable concrete.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) The modified metakaolin and the ultrafine fly ash are added, and can achieve a good compounding effect, so that the internal structure of the impervious concrete is more compact, internal gaps and communicated capillaries are greatly reduced, and the impervious concrete has good impermeability;
(2) the addition of the waste polypropylene fibers can effectively improve the pore size distribution of the impervious concrete and can also refine large pores in the structure, so that the internal structure of the impervious concrete is more compact, internal gaps and communicated capillaries are greatly reduced, and the integral impermeability of the impervious concrete can be greatly improved;
(3) the functional assistant comprising calcium sulphoaluminate and silica fume is added to raise the structural density and strength of the impervious concrete, so that the impervious concrete has disconnected bubbles inside to cut off the capillary passage and change the pore structure, and this raises the impermeability of the impervious concrete.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
the invention is described in detail below with reference to the figures and examples.
example 1: the impervious concrete comprises the following components in parts by weight as shown in Table 1, and is prepared by the following steps:
Step one, stirring and mixing Portland cement, medium sand, stones, mineral powder, ultrafine fly ash and modified metakaolin in a drying barrel in corresponding parts by weight, wherein the rotating speed is 500rpm, the time is 30min, and the temperature is controlled at 90 ℃ to form a mixture;
Step two, adding quartz powder in corresponding parts by weight into the mixture, and fully mixing for 10min at a stirring speed of 500rpm to obtain a base material;
Step three, adding sodium lignosulfonate in corresponding parts by weight into water, and fully mixing for 10min at a stirring speed of 300rpm to form a mixed solution;
And step four, pouring the base materials into the mixed solution for 3 times by mass, and continuously stirring and mixing the base materials at the stirring speed of 800rpm for 6min each time, thus obtaining the impervious concrete.
note: in the first step, the modified metakaolin is prepared by the following steps:
S1, placing metakaolin into a container, adding 5 times of polyacrylic acid solution, adjusting the pH to 3.5, controlling the temperature to be 30 ℃, reacting for 11 hours, and stirring by using a stirrer in the reaction process to obtain a mixed solution;
s2, carrying out vacuum filtration on the mixed solution to obtain a precipitate, then placing the precipitate in a 70 ℃ oven for drying, then leaching with ethanol, then placing in the 70 ℃ oven for drying, and grinding to obtain the modified metakaolin.
examples 2 to 8: an impermeable concrete was different from example 1 in that the components and their respective parts by weight are shown in table 1.
TABLE 1 Components and parts by weight of examples 1-8
Example 9: an impermeable concrete, which differs from example 1 in that in step one, the modified metakaolin is prepared by the following steps:
s1, placing metakaolin into a container, adding 4 times of polyacrylic acid solution, adjusting the pH value to 3, controlling the temperature to be 25 ℃, reacting for 12 hours, and stirring by using a stirrer in the reaction process to obtain a mixed solution;
S2, carrying out vacuum filtration on the mixed solution to obtain a precipitate, then placing the precipitate in a 60 ℃ oven for drying, then leaching with ethanol, then placing in the 60 ℃ oven for drying, and grinding to obtain the modified metakaolin.
example 10: an impermeable concrete, which differs from example 1 in that in step one, the modified metakaolin is prepared by the following steps:
s1, placing metakaolin into a container, adding 6 times of polyacrylic acid solution, adjusting the pH value to 4, controlling the temperature to be 35 ℃, reacting for 10 hours, and stirring by using a stirrer in the reaction process to obtain a mixed solution;
s2, carrying out vacuum filtration on the mixed solution to obtain a precipitate, then placing the precipitate in an oven at 80 ℃ for drying, then leaching with ethanol, then placing in the oven at 80 ℃ for drying, and grinding to obtain the modified metakaolin.
Example 11: an impermeable concrete, which is different from the concrete of example 1 in that the third step is specifically configured to add corresponding weight parts of sodium sulfite to water, and sufficiently mix for 10min at a stirring speed of 300rpm to form a mixed solution.
example 12: the impermeable concrete is different from the impermeable concrete in example 1 in that the step three is specifically set as that tannin in corresponding parts by weight is added into water and fully mixed for 10min at the stirring speed of 300rpm to form a mixed solution.
example 13: the impermeable concrete is different from the impermeable concrete in example 1 in that the step three is specifically set as that calcium saccharate with corresponding weight parts is added into water and fully mixed for 10min at the stirring speed of 300rpm to form a mixed solution.
example 14: the difference between the impermeable concrete and the concrete in the example 1 is that the second step is specifically set up to add 25 parts by weight of silicon carbide into the mixture and fully mix the mixture for 10min at a stirring speed of 500rpm to obtain the base material.
Example 15: the difference of the impervious concrete from the example 1 is that the second step is specifically set up as that 15 parts of silicon nitride and 10 parts of corundum powder are added into the mixture according to the corresponding parts by weight, and the mixture is fully mixed for 10min, and the stirring speed is 500rpm, so that the base material is obtained.
Example 16: the impermeable concrete is different from the impermeable concrete in example 1 in that the second step is specifically set up in that 15 parts by weight of quartz powder, 5 parts by weight of aluminum silicate fibers and 5 parts by weight of glass fibers are added into the mixture and fully mixed for 10min, and the stirring speed is 500rpm to obtain the base material.
Example 17: the impermeable concrete is different from the impermeable concrete in example 1 in that the second step is specifically configured in that 25 parts by weight of quartz powder and 5.5 parts by weight of waste polypropylene fibers are added into a mixture and fully mixed, wherein the length of the waste polypropylene fibers is 15.5mm, the diameter of the waste polypropylene fibers is 7.5 microns, the mixing time is 10min, and the stirring speed is 500rpm, so that a base material is obtained.
example 18: the impermeable concrete is different from the impermeable concrete in example 1 in that the second step is specifically set to add 25 parts by weight of quartz powder and 3 parts by weight of waste polypropylene fibers into the mixture and fully mix the quartz powder and the waste polypropylene fibers, wherein the length of the waste polypropylene fibers is 12mm, the diameter of the waste polypropylene fibers is 10 microns, the mixing time is 10min, and the stirring speed is 500rpm to obtain the base material.
example 19: the impermeable concrete is different from the impermeable concrete in example 1 in that the second step is specifically configured in that 25 parts by weight of quartz powder and 8 parts by weight of waste polypropylene fibers are added into a mixture and fully mixed, wherein the length of the waste polypropylene fibers is 19mm, the diameter of the waste polypropylene fibers is 5 microns, the mixing time is 10min, and the stirring speed is 500rpm to obtain a base material.
Example 20: the impermeable concrete is different from the concrete in example 1 in that the step two is specifically set to add 25 parts by weight of quartz powder and 3.5 parts by weight of functional additives into a mixture for fully mixing, wherein the functional additives are prepared from the following raw materials in parts by weight of 1: 2.5, mixing the calcium sulphoaluminate with the silica fume for 10min, and stirring at the speed of 500rpm to obtain the base material.
example 21: the impermeable concrete is different from the concrete in the embodiment 1 in that the step two is specifically set to add 25 parts of quartz powder and 2 parts of functional additives in parts by weight into a mixture and fully mix the quartz powder and the functional additives, wherein the functional additives are prepared from the following raw materials in parts by weight of 1: 2, mixing the calcium sulphoaluminate and the silica fume for 10min at the stirring speed of 500rpm to obtain the base material.
Example 22: the impermeable concrete is different from the concrete in the embodiment 1 in that the step two is specifically set to add 25 parts of quartz powder and 5 parts of functional additives in parts by weight into a mixture and fully mix the quartz powder and the functional additives, wherein the functional additives are prepared from the following raw materials in parts by weight of 1: 3, mixing the calcium sulphoaluminate and the silica fume for 10min at the stirring speed of 500rpm to obtain the base material.
comparative example 1: the impermeable concrete is different from the concrete in example 1 in that the step one is specifically set as that Portland cement, medium sand, stones, mineral powder and modified metakaolin in corresponding parts by weight are stirred and mixed in a drying barrel, the rotating speed is 500rpm, the time is 30min, and the temperature is controlled at 90 ℃ to form a mixture.
comparative example 2: the impermeable concrete is different from the concrete in example 1 in that the step one is specifically set as that Portland cement, medium sand, stones, mineral powder and modified metakaolin in corresponding parts by weight are stirred and mixed in a drying barrel, the rotating speed is 500rpm, the time is 30min, and the temperature is controlled at 90 ℃ to form a mixture.
Comparative example 3: the impermeable concrete is different from the impermeable concrete in example 1 in that the step one is specifically set as that Portland cement, medium sand, stones and mineral powder in corresponding parts by weight are stirred and mixed in a drying barrel, the rotating speed is 500rpm, the time is 30min, and the temperature is controlled at 90 ℃ to form a mixture.
comparative example 4: the impermeable concrete is different from the concrete in example 1 in that the step one is specifically set as that Portland cement, medium sand, stones, mineral powder, ultrafine fly ash and metakaolin in corresponding parts by weight are stirred and mixed in a drying barrel, the rotating speed is 500rpm, the time is 30min, and the temperature is controlled at 90 ℃ to form a mixture.
performance testing
Test samples: the impermeable concrete obtained in examples 1 to 22 was used as test samples 1 to 22, and the impermeable concrete obtained in comparative examples 1 to 4 was used as control samples 1 to 4.
The test method comprises the following steps: the test samples 1-22 and the comparison samples 1-4 are made into standard test blocks according to GB/T50082-2009 Standard test method Standard for testing the long-term performance and the durability of the common concrete, and the water seepage height of the standard test blocks is tested by adopting the water seepage height.
And (3) test results: the test results of the test samples 1 to 22 and the control samples 1 to 4 are shown in Table 2. As shown in Table 2, the results of the tests of the test samples 1 to 8 and the comparative samples 1 to 4 are compared, and the modified metakaolin or ultrafine fly ash can improve the whole impermeability of the impermeable concrete, and when the modified metakaolin or ultrafine fly ash is mixed for use, the modified metakaolin or ultrafine fly ash can play a good role in compounding and enhancing the permeability of the impermeable concrete, so that the permeability of the impermeable concrete is greatly improved. Meanwhile, compared with the common metakaolin, the modified metakaolin modified by the polyacrylic acid solution can improve the impermeability of the impermeable concrete. The comparison of the test results of the test samples 9-16 and the test sample 1 shows that the preparation of the water reducing agent, the reinforcing filler and the modified metakaolin disclosed by the invention is suitable for the preparation of the impervious concrete, and the impervious concrete can maintain good and stable impermeability. The comparison of the test results of the test samples 17-19 and the test sample 1 shows that the addition of the waste polypropylene fiber can greatly improve the integral impermeability of the impermeable concrete. The comparison of the test results of the test samples 20-22 and the test sample 1 can obtain that the addition of the functional assistant consisting of calcium sulphoaluminate and silica fume can also greatly improve the integral impermeability of the impermeable concrete.
TABLE 2 test results of test samples 1-22 and control samples 1-4
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. the impervious concrete is characterized by comprising the following components in parts by weight:
180 portions of water and 220 portions of water;
400 portions of stone;
700 portions of medium sand and 800 portions;
240 portions and 260 portions of Portland cement;
90-100 parts of mineral powder;
40-70 parts of ultrafine fly ash;
60-100 parts of modified metakaolin;
3-5 parts of a water reducing agent;
15-25 parts of reinforcing filler.
2. The impervious concrete of claim 1, wherein 3 to 8 parts by weight of waste polypropylene fibers are further added to the impervious concrete.
3. The impervious concrete of claim 2, wherein the waste polypropylene fibers have a length of 12-19mm and a diameter of 5-10 μm.
4. The impervious concrete of claim 1, wherein 2 to 5 parts by weight of functional additives are further added to the impervious concrete, the functional additives comprise calcium sulfoaluminate and silica fume, and the weight part ratio of the calcium sulfoaluminate to the silica fume is 1: (2-3).
5. The impermeable concrete according to claim 1, wherein the water reducing agent is any one of sodium lignosulfonate, sodium sulfite, tannin and sugar calcium.
6. The impervious concrete of claim 1, wherein the reinforcing filler is selected from any one or more of quartz powder, silicon carbide, silicon nitride, corundum powder, aluminum silicate fiber and glass fiber.
7. a process for the preparation of the impermeable concrete according to claim 1, comprising the following steps:
Step one, stirring and mixing Portland cement, medium sand, stones, mineral powder, ultrafine fly ash and modified metakaolin in corresponding parts by weight to form a mixture;
Adding the reinforcing filler in corresponding parts by weight into the mixture, and fully mixing to obtain a base material;
Adding water reducing agents in corresponding weight parts into water, and fully mixing to form a mixed solution;
and step four, pouring the base materials into the mixed solution for multiple times, and continuously stirring and mixing to obtain the impervious concrete.
8. the process for preparing the impervious concrete of claim 7, wherein in the first step, the modified metakaolin is prepared by the following steps:
S1, placing metakaolin into a container, adding 4-6 times of polyacrylic acid solution, adjusting the pH to 3-4, controlling the temperature to be 25-35 ℃, reacting for 10-12h, and stirring by using a stirrer in the reaction process to obtain a mixed solution;
S2, carrying out vacuum filtration on the mixed solution to obtain a precipitate, then placing the precipitate in a drying oven at the temperature of 60-80 ℃ for drying, leaching with ethanol, then placing in the drying oven at the temperature of 60-80 ℃ for drying, and grinding to obtain the modified metakaolin.
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| CN111320431A (en) * | 2020-03-21 | 2020-06-23 | 上海石化安东混凝土有限公司 | Marine concrete and preparation method thereof |
| CN111320438A (en) * | 2020-03-21 | 2020-06-23 | 上海石化安东混凝土有限公司 | Green environment-friendly concrete and preparation method thereof |
| CN111960769A (en) * | 2020-08-25 | 2020-11-20 | 岑儒湛 | Novel nano modified high-strength concrete |
| CN112299797A (en) * | 2020-10-29 | 2021-02-02 | 辽宁省交通高等专科学校 | Impervious reinforced grouting material for fractured rock mass under flowing water condition and slurry production method |
| CN112939531A (en) * | 2021-01-23 | 2021-06-11 | 广州市鸿磊混凝土有限公司 | Waterproof impervious concrete and preparation method thereof |
| CN113149557A (en) * | 2021-04-23 | 2021-07-23 | 上海昊城混凝土有限公司 | Impervious concrete and preparation method thereof |
| CN114426422A (en) * | 2022-02-18 | 2022-05-03 | 华创建筑设计有限公司 | Waterproof and anti-seepage medium-high-strength resin concrete for underground space and preparation process thereof |
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| CN111021599A (en) * | 2019-12-24 | 2020-04-17 | 惠州尚翔建设工程有限公司 | Shear wall structure and construction method thereof |
| CN111320431A (en) * | 2020-03-21 | 2020-06-23 | 上海石化安东混凝土有限公司 | Marine concrete and preparation method thereof |
| CN111320438A (en) * | 2020-03-21 | 2020-06-23 | 上海石化安东混凝土有限公司 | Green environment-friendly concrete and preparation method thereof |
| CN111320431B (en) * | 2020-03-21 | 2022-05-17 | 上海石化安东混凝土有限公司 | Marine concrete and preparation method thereof |
| CN111960769A (en) * | 2020-08-25 | 2020-11-20 | 岑儒湛 | Novel nano modified high-strength concrete |
| CN112299797A (en) * | 2020-10-29 | 2021-02-02 | 辽宁省交通高等专科学校 | Impervious reinforced grouting material for fractured rock mass under flowing water condition and slurry production method |
| CN112939531A (en) * | 2021-01-23 | 2021-06-11 | 广州市鸿磊混凝土有限公司 | Waterproof impervious concrete and preparation method thereof |
| CN113149557A (en) * | 2021-04-23 | 2021-07-23 | 上海昊城混凝土有限公司 | Impervious concrete and preparation method thereof |
| CN114426422A (en) * | 2022-02-18 | 2022-05-03 | 华创建筑设计有限公司 | Waterproof and anti-seepage medium-high-strength resin concrete for underground space and preparation process thereof |
| CN114426422B (en) * | 2022-02-18 | 2022-10-14 | 华创建筑设计有限公司 | Waterproof and anti-seepage medium-high-strength resin concrete for underground space and preparation process thereof |
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