Premixed pervious concrete, preparation method and application thereof

A technology of permeable concrete and concrete, which is applied to cohesive pavement paved on site, pavement details, buildings, etc. It can solve the problems that permeable concrete cannot meet the performance requirements, and achieve the purpose of being suitable for large-scale construction and improving construction efficiency. The effect of improving fluidity

Active Publication Date: 2019-03-29
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiency that the permeable concrete produced by the pre-mixed process in our country cannot meet the performance requirements, and provides a pre-mixed permeable concrete and its preparation method and application

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  • Premixed pervious concrete, preparation method and application thereof
  • Premixed pervious concrete, preparation method and application thereof
  • Premixed pervious concrete, preparation method and application thereof

Examples

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preparation example Construction

[0046] The preparation method of the above-mentioned ready-mixed permeable concrete of the present invention, its specific preparation process is: use commercial mixing station to concentrate and stir, put in cement, silica fume, coarse aggregate first when feeding, add half of the amount of water, and stir for 25 to 35 seconds; Then add polymer emulsion, special plastic retaining agent and polycarboxylate superplasticizer, and stir for 50-65s; finally add the remaining water, and stir for 100-120s; observe the wrapping degree and state of the permeable concrete slurry, and hold it by hand when it is evenly wrapped When the ready-mixed permeable concrete is ready-mixed, the slump of the ready-mixed permeable concrete is 150-180mm, the strength grade is C15-C35, and the flexural strength is 2.0-4.5MPa. , the water permeability coefficient is ≥2.0mm / s, even as high as 5mm / s or more, and the slump loss of the ready-mixed permeable concrete after 2 hours is ≤30mm.

[0047] The app...

Embodiment 1

[0058] A kind of ready-mixed permeable concrete according to this embodiment includes cement, coarse aggregate, silica fume, polymer emulsion, special plastic retaining agent, polycarboxylate superplasticizer and water, and the unilateral mass of each component is shown in Table 1 ,in:

[0059] (1) Plastic retaining agent, the plastic retainer of the present embodiment is macromonomer ethylene glycol monovinyl polyglycol ether (EPEG), ethyl acrylate (EA), allyl sodium sulfonate (ALS) and Hydroxyalkyl acrylate (HPA) is an unsaturated monomer compounded with benzoyl peroxide as an initiator and 3-mercaptopropionic acid as a chain transfer agent. The molar ratio of unsaturated monomer n(EPEG) : n(EA): n(ALS): n(HPA)=1: 1.7: 1.2: 2.4, the amount of initiator is 0.6% of the total mass of unsaturated monomers; the amount of chain transfer agent is 0.6% of the total mass of unsaturated monomers 0.2%.

[0060] (2) polymer emulsion, the polymer emulsion of the present embodiment adop...

Embodiment 2

[0075] A kind of ready-mixed permeable concrete according to this embodiment includes cement, coarse aggregate, silica fume, polymer emulsion, special plastic retaining agent, polycarboxylate superplasticizer and water, and the ratio of each component is shown in Table 1. Wherein: the mol ratio n (EPEG) of unsaturated monomer in the plastic retaining agent of present embodiment: n (EA): n (ALS): n (HPA)=1: 1.0: 0.8: 1.8, initiator consumption is not 0.4% of the total mass of saturated monomers; the amount of chain transfer agent is 0.1% of the total mass of unsaturated monomers. The polymer emulsion in this embodiment is an aqueous acrylic resin emulsion with a solid content of 40%; the cement is ordinary Portland cement with a strength grade of 52.5.

[0076] The ready-mixed permeable concrete of this embodiment is concentratedly stirred by a commercial mixing station. When feeding materials, first put cement, silica fume, and coarse aggregate, then add half of the water cons...

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Abstract

The invention discloses a premixed pervious concrete, a preparation method and an application thereof and belongs to the technical field of building material concrete. The premixed pervious concrete disclosed by the invention contains cement, coarse aggregate, silica fume, polymer emulsion, special plastic retaining agent, polycarboxylate superplasticizer and water, wherein the special plastic retaining agent is formed by taking macro-monomer ethylene glycol monovinyl polyethylene glycol ether, ethyl acrylate, sodium allysulfonate and hydroxyalkyl acrylate as unsaturated monomers, benzoyl peroxide as an initiator and 3-thiohydracrylic acid as a chain transfer agent and then compounding. According to the technical scheme of the invention, the premixed pervious concrete is capable of meetingthe demand of large-scale application in pervious concrete market, and meanwhile, the use performance of the premixed pervious concrete can be effectively guaranteed so as to guarantee the stabilityof engineering construction quality.

Description

technical field [0001] The invention relates to the technical field of building material concrete, in particular to a ready-mixed permeable concrete and its preparation method and application. Background technique [0002] Permeable concrete is a dry concrete material. Pervious concrete in good condition should be held in a ball, loose and loose, the aggregate is evenly coated with paste, and the surface of the paste is shiny. Due to the special properties of pervious concrete, the mixing ratio of ingredients is very strict, especially the water content, which is limited to a small range to ensure the good strength and permeability of pervious concrete. Specifically, too much water content will cause the mud to flow into the aggregate and cause pore blockage, which will seriously affect the water permeability of the concrete pavement; if it is too dry, it will affect the bonding of the aggregate, and the strength of the permeable concrete will not be strong enough to cause t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E01C7/14E01C11/22
CPCC04B28/04C04B2111/00284C04B2111/0075C04B2201/50E01C7/142E01C11/225C04B18/12C04B18/146C04B24/2641C04B24/165C04B24/24
Inventor 何兆芳尹万云金仁才柳荣芳
Owner CHINA MCC17 GRP
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