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A kind of permeable aggregate for concrete and preparation method thereof

A technology of concrete and aggregate, applied in the field of building materials, can solve the problems of large fluctuation of concrete quality, high transportation cost, waste of excess slurry, etc., and achieve the effect of compact structure, lower transportation cost, and guaranteed protection effect.

Active Publication Date: 2021-01-12
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 aggregate for concrete and a preparation method thereof. The concrete prepared by the permeable aggregate can effectively solve the problems of large fluctuations in concrete quality, high transportation costs, waste of excess slurry, and pollution. It is especially convenient for projects with less consumption, maintenance projects or projects constructed in places with inconvenient transportation

Method used

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  • A kind of permeable aggregate for 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 aggregate for concrete and a preparation method of the water permeable aggregate. The water permeable aggregate comprises a cementing material and aggregate, wherein the outer surface of the aggregate is uniformly coated with the cementing material; and the outer surface of the cementingmaterial is coated with a starch membrane. The preparation method of the water permeable aggregate comprises the following steps: uniformly stirring the cementing material; completely wetting the surface of the aggregate with absolute ethyl alcohol; mixing the cementing material with the wetted aggregate; dissolving modified starch into a starch membrane solution with the mass fraction of 1-5%; spraying the starch membrane solution to the surface of the cementing material in which the aggregate is coated, carrying out drying treatment to form the starch membrane and prepare the water permeable aggregate. By adopting concrete made from the water permeable aggregate, the problems that concrete is large in quality fluctuation, high in transportation cost, waste in residual slurry, serious inpollution and the like can be effectively solved, and convenience can be brought to projects with relatively small amount of concrete, repairing projects or projects worked at places with inconvenience in transportation.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a water-permeable aggregate for 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 pavem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/12
CPCC04B20/12C04B20/1077C04B20/1029C04B20/1066C04B14/02C04B20/1048
Inventor 王宁林燕杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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