Special modifying agent for water-permeable concrete and preparation method thereof

Abstract

The invention discloses a special modifying agent for water-permeable concrete. The special modifying agent is characterized by comprising the following components in percentage by mass: 10 percent to15 percent of long-carbon-chain silane, 45 percent to 60 percent of a dispersant, 5 percent to 10 percent of polysiloxane resin, 5 percent to 10 percent of fluorocarbon resin emulsion and 10 percentto 20 percent of de-ionized water, wherein the sum of the mass percent is 100 percent. The special modifying agent for the water-permeable concrete, disclosed by the invention, is doped into the water-permeable concrete and a hydrophobic effect enforces water molecules to be dispersed into the concrete, so that cement is more easily hydrated; after molding, dense hydrophobic films are formed on the surface of the concrete and an inner wall of a pore structure, and the water in the concrete can be effectively prevented from being evaporated, so that later-period sufficient hydration of the concrete is ensured and the strength of the concrete is easy to improve.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a special modifier for permeable concrete and a preparation method thereof. Background technique [0002] At present, the construction of sponge city is in full swing, and 16 cities across the country have obtained the qualification of sponge city pilot. As an ecological and environmentally friendly pavement material, permeable concrete has a continuous pore structure inside, and the holes are evenly distributed in a honeycomb shape. Compared with traditional pavement materials, permeable concrete has better water permeability and air permeability, which is more conducive to Sound absorption and noise reduction, adjustment of surface temperature, purification of water bodies, protection of groundwater resources, improvement of urban thermal environment, and improvement of soil ecological environment are fully in line with the concept of sponge city construction in my country and ...

AI Technical Summary

Problems solved by technology

[0007] The above patents are only based on the strength of pervious concrete. By developing high-strength cementitious materials or concrete reinforcing agents, the strength of pervious concrete can be maximized on the premise of ensuring that the water permeability meets the requirements. The purpose of the strength and water permeability of concrete, not to mention the durability of permeable concrete

Durability is the ability of concrete to resist various destructive factors under actual use conditions and maintain strength and appearance integrity for a long time. Poor durability will cause concrete structures to withstand various environmental conditions (light, heat, oxygen, water, acid, etc.) Alkali and salt, etc.) are more easily destroyed, the structural stability and safety will be greatly reduced, and the service life will be greatly reduced

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