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Water-permeable concrete and preparation method thereof

A technology for permeable concrete and cementitious materials, applied in the field of building materials, can solve the problems of large fluctuation in the quality of permeable concrete, high transportation costs, waste of excess slurry, etc., and achieve the effects of improving poor water resistance, facilitating construction, and reducing transportation costs.

Active Publication Date: 2019-01-18
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the above technical problems, the present invention proposes a permeable concrete and its preparation method, which can effectively solve the problems of large fluctuations in the quality of the permeable concrete, high transportation costs, waste of residual slurry and pollution, and facilitate construction. , maintenance projects or construction projects in places with inconvenient transportation is particularly convenient

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  • Water-permeable concrete and preparation method thereof

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Embodiment 1

[0038] As a preferred embodiment of the present invention, the present invention includes a water-permeable aggregate for concrete, including cementitious material and aggregate, characterized in that: the outer surface of the aggregate is uniformly wrapped with cementitious material, the glue The outer surface of the gelling material is wrapped with a starch film, the starch film is formed by spraying a starch film solution with a mass fraction of 1% on the outer surface of the gelling material and then drying, and the starch film solution is obtained by dissolving modified starch in a solvent.

[0039] The solvent is 1,4-dioxane; the modified starch is obtained by esterification and modification of corn starch, and the degree of substitution of the modified starch is 1.0; the gelling material includes 94 parts of P.O42.5 cement, 5 parts of silica fume part, 0.9 part of latex powder, and 0.1 part of water reducer; the aggregate is gravel with a particle size of 10 mm.

[0040...

Embodiment 2

[0053] As another preferred embodiment of the present invention, the present invention includes a permeable aggregate for concrete, including cementitious material and aggregate, characterized in that: the outer surface of the aggregate is uniformly wrapped with cementitious material, and the The outer surface of the gelling material is wrapped with a starch film, the starch film is formed by spraying a starch film solution with a mass fraction of 3% on the outer surface of the gelling material and then drying, and the starch film solution is obtained by dissolving modified starch in a solvent.

[0054] The solvent is chloroform; the modified starch is obtained by esterification and modification of potato starch, and the degree of substitution of the modified starch is 0.5; the gelling material includes 90 parts of P.O52.5 cement, 8 parts of nano silicon dioxide, latex 1.7 parts of powder, 0.3 parts of water reducer; the aggregate is gravel with a particle size of 5 mm.

[005...

Embodiment 3

[0068] As another preferred embodiment of the present invention, the present invention includes a water-permeable aggregate for concrete, including cementitious material and aggregate, characterized in that: the outer surface of the aggregate is evenly wrapped with cementitious material, the The outer surface of the gelling material is wrapped with a starch film, the starch film is formed by spraying a starch film solution with a mass fraction of 5% on the outer surface of the gelling material and then drying, and the starch film solution is obtained by dissolving modified starch in a solvent.

[0069] The solvent is acetone; the modified starch is obtained by esterification and modification of tapioca starch, and the degree of substitution of the modified starch is 0; the gelling material includes 88 parts of P.O52.5 cement, 4 parts of nano silicon dioxide, and 6 parts of silicon powder part, 1.5 part of latex powder, and 0.5 part of water reducer; the aggregate is gravel with...

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Abstract

The invention relates to the technical field of building materials and in particular relates to water-permeable concrete and a preparation method thereof. The water-permeable concrete is prepared from93 to 97 parts of water-permeable aggregate, 9 to 19 parts of first-time water and 3 to 7 parts of second-time water, wherein the water-permeable aggregate comprises a gel material, aggregate and a starch film; the gel material covers the aggregate; the starch film covers the gel material; the starch film is formed by spraying a starch film solution with the mass percent of 1 to 5 percent on theouter surface of the gel material and drying; the starch film solution is obtained by dissolving modified starch in a solvent. The preparation method of the water-permeable concrete comprises the following steps: flatly paving the water-permeable aggregate and spraying the first-time water; spraying the second-time water after 4 to 7min; finally, vibrating and compacting. By adopting the water-permeable concrete prepared by the method, the problems of existing concrete that the quality fluctuation is great, the transportation cost is high, and residual slurry wastes and pollution are caused and the like can be effectively solved; the water-permeable concrete is convenient to construct and is especially convenient in engineering with less dosage of the concrete, repairing engineering or engineering for constructing in places with insufficient traffic and transportation.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a permeable concrete and a preparation method thereof. Background technique [0002] Permeable concrete is a honeycomb concrete material that uses single-grain coarse aggregate as the skeleton, and cement paste is wrapped on the surface of the coarse aggregate particles. As an environmentally friendly and ecological road material, it has water permeability, can quickly eliminate water accumulation in roads and squares, and reduce the burden of urban drainage; it can quickly infiltrate rainwater into the ground, replenish groundwater, maintain soil moisture, and maintain the ecology of groundwater and soil balance; in terms of heat absorption and heat storage functions, it is close to the ground covered by natural vegetation, adjusts the temperature and humidity of urban space, and alleviates the urban heat island effect; the permeable concrete pavement is a way to prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/12C04B38/00
CPCC04B20/12C04B28/04C04B38/0038C04B2111/00284C04B2201/50C04B14/06C04B2103/0045C04B2103/302C04B14/02C04B20/1077C04B20/1048C04B28/02C04B38/0074
Inventor 王宁林燕杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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