Erosion-resistant permeable concrete binder

Abstract

The invention provides an erosion-resistant water-permeable concrete cementing material, made with, by weight, 30-50% of ordinary Portland cement, 10-20% of high-iron calcium aluminate cement, 10-25%of superfine mineral powder, 10-20% of metallic sulfates, 0.5-2.5% of a water-soluble flocculant, 1-5% of a water-absorbing expandable inorganic material, 0.5-2.0% of polycarboxylate superplasticizerpowder, 0.2-0.5% of amino-sulfonate superplasticizer powder, 0.1-0.5% of a wetting agent, 2-7% of a metallic soap waterproof agent and 0.2-0.8% of oil-modifying hydrophobing agent, wherein the high-iron calcium aluminate cement coordinates with the metallic sulfates, the superfine mineral powder and ordinary Portland cement to improve strength of concrete; the water-absorbing expandable inorganicmaterial, the water-soluble flocculant and the wetting agent improve wrapping property and water-holding property of concrete; the polycarboxylate superplasticizer powder, the amino-sulfonate superplasticizer powder and the metallic soap waterproof agent ensure low slump and mobility of the concrete; the metallic soap waterproof agent and the oil-modifying hydrophobing agent can improve lubricating degree of inner and outer surface structures of a cement binding material.

Description

technical field [0001] The invention belongs to the technical field of urban pavement structures, and relates to an erosion-resistant permeable concrete cementitious material, which is used in lightweight road projects such as sidewalks, light carriageways, ground decoration, landscape roads, city squares, stadiums, fire exits, and parking lots. Background technique [0002] With the continuous development of urban modernization, the urban heat island effect is significant. High temperature accelerates photochemical reactions, aggravates air pollution, and damages human health. The city is covered by reinforced concrete, which has poor water and air permeability, resulting in poor breathability of the road surface and poor penetration of rainwater. Permeable concrete has a porous structure, which can improve the situation of low groundwater level, increase urban groundwater resources, improve the city's climate, and improve the environment. At present, pervious concrete has...

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Problems solved by technology

[0008] Most of the above-mentioned patents are about the preparation method of pervious concrete or the specific admixtures or small materials used. In terms of components, traditional emulsion thickening components or hydrophobic aggregates are used to enhance the water permeability of pervious concrete. No innovations in components and concepts have been seen.

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