Iron-tailing anti-blockage water-permeable concrete pavement and preparation method therefor

Abstract

The invention discloses an iron-tailing anti-blockage water-permeable concrete pavement and a preparation method therefor. The iron-tailing anti-blockage water-permeable concrete pavement is an ecological environment-friendly water-permeable material. The anti-blockage water-permeable concrete pavement has a three-layer-hole (a base layer, a sub surface layer and a surface layer) gradient-layer complex structure. Ingredients of pervious concrete of all layers and a proportioning ratio of the ingredients are disclosed; and the water-permeable surface layer can be used for filtering porous structures of impurities in rainfall, and the pervious concrete which is used for effectively preventing fine grains from blocking the pavement is formed. According to the iron-tailing anti-blockage water-permeable concrete pavement and the preparation method therefor, the pervious concrete adopts a rejected material, i.e., iron tailing as a skeletal material, is a novel building material and is beneficial to the relief of environmental pollution and the bringing of huge social, economic and ecological benefits.

Description

technical field [0001] The invention relates to the field of building materials, and is an ecological environment-friendly permeable material, in particular to an iron tailings anti-clogging permeable concrete pavement and a preparation method thereof. Background technique [0002] Permeable pavement has many characteristics that other pavement materials do not have, mainly good water permeability and water retention. Compared with the aggregate composition of ordinary concrete, pervious concrete is mixed with aggregate and cement in a single gradation, which will lead to a decrease in its mechanical properties while forming a large number of through holes as permeable channels and having the function of permeable water. In order to prevent clogging, permeable concrete as a pavement material generally adopts a double-layer permeable structure with a surface layer and a base layer. The surface layer is generally about 80mm thick and has a pore size of less than 3mm, so that l...

AI Technical Summary

Problems solved by technology

Compared with the aggregate composition of ordinary concrete, pervious concrete is mixed with aggregate and cement in a single grade, which will lead to a decrease in its mechanical properties while forming a large number of through holes as permeable channels and having the function of permeable water.

In order to prevent clogging, permeable concrete as a pavement material generally adopts a double-layer permeable structure with a surface layer and a base layer. The surface layer is generally about 80mm thick and has a pore size of less than 3mm, so that larger particles in the rainwater can be blocked, but Some fine particles can still enter the water-permeable channel, which will be blocked after a period of use and lose the water-permeable function

[0003] In order to increase the strength and construction performance of permeable materials, some high-cost cementitious materials and admixtures, such as redispersible rubber powder and active micropowder, are used in the formula of pervious concrete, which makes the cost of pervious concrete much higher than that of ordinary concrete , so the pervious concrete has a large resistance to popularization in specific applications, and its competitiveness is not high compared with ordinary concrete pavement materials

[0004] On the basis of the existing double-layer permeable concrete structure, a permeable pavement material with a three-layer pore structure (base layer, sub-surface layer and surface layer) was invented, and the permeable surface layer was obtained by phase transformation to filter rainfall The porous structure of impurities, but it is difficult to process in specific applications, so it is necessary to develop a surface layer composition formula and construction process that is convenient for construction and void formation, and to process permeable concrete pavement that can prevent clogging and Carry out application demonstration

Images