A kind of anti-clogging ecological type permeable concrete additive and preparation method thereof

Abstract

The invention discloses an anti-clogging ecological type permeable concrete additive and a preparation method thereof. Its composition is calculated by mass percentage: 60-80% of metakaolin; 1-2% of film-forming agent; 15-20% of thickener; 3-5% of early strength agent; 2-3% of water-repellent agent. Mix metakaolin and water at a mass fraction of 1:1, add a film-forming agent at the same time, grind for 5-15 minutes to make an emulsion; then add a water-repellent agent to the obtained emulsion, and shear it into a paste at room temperature; A strengthening agent and a thickening agent are added, mixed evenly, dried and ground to a 45 μm square hole sieve residue ≤ 5%, and an anti-clogging ecological permeable concrete additive is obtained. The method provided by the invention can realize the antifouling and self-cleaning functions of the permeable concrete pavement, simultaneously improve its ability to resist freeze-thaw damage and reduce the cost of later maintenance.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an anti-clogging ecological type permeable concrete additive and a preparation method thereof. Background technique [0002] With the rapid development of cities in our country, the construction of a large number of cement concrete impermeable pavements has increased, which makes the urban drainage system heavy burden every time there is heavy rainfall, and the problem of waterlogging continues to emerge, which has brought great troubles to people's daily life. [0003] Sponge city, also known as "water elastic city", is a new concept of stormwater management in a new generation of cities. Permeable concrete pavement is one of the commonly used permeable pavements at present, and has good water permeability, cooling and noise reduction functions. Permeable concrete has a large number of pores inside and has a water-permeable function, but its permeable pores are eas...

AI Technical Summary

Problems solved by technology

Permeable concrete has a large number of pores inside and has a water-permeable function, but its permeable pores are easily blocked by a large amount of soil and debris left by vehicles, and eventually lose its water-permeable performance

Moreover, due to the clogging of the pores, a large amount of water will remain in the pervious concrete, which will easily cause freeze-thaw damage to the pervious concrete and seriously reduce the service life of the pervious concrete.

Therefore, freeze-thaw damage and pore blockage are the main problems of pervious concrete pavement, which seriously hinder its wide-scale application.

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