Cement-free pervious concrete brick

Abstract

The invention belongs to the technical field of concrete bricks, and particularly relates to a cement-free water-permeable concrete brick which comprises a brick body, convex blocks and grooves are formed in the four side faces in the circumferential direction of the brick body, the convex blocks and the grooves are located on the adjacent side faces of the brick body respectively, and the positions of the convex blocks and the grooves correspond to one another; water permeable bricks on the ground can accumulate flying dust in an urban environment to destroy the water permeability of the water permeable bricks, and the laid water permeable bricks can form staggered heights under the change of a foundation soil layer and stress, so that the quality of the water permeable brick ground is influenced; therefore, the convex blocks arranged on the brick body are matched with the grooves, the overall stability of the floor of the brick body is stabilized, and when rainwater flows along the wedge grooves in the surface of the brick body, dust attached to the brick body is driven to enter the gaps between the convex blocks and the grooves in the brick body through the wedge angles and is discharged to the two sides of the floor of the brick body; the water permeability of the surface of the brick body is prevented from being influenced, and raised dust is cleaned, so that the application effect of the cement-free water-permeable concrete brick is improved.

Description

technical field [0001] The invention belongs to the technical field of concrete bricks, in particular to a cementless permeable concrete brick. Background technique [0002] Permeable concrete, also known as porous concrete, is a kind of porous lightweight concrete made by mixing aggregate, cement, reinforcing agent, and water. It does not contain fine aggregate, and a honeycomb structure with uniform distribution of holes is formed in permeable concrete. The characteristics of air permeability, water permeability and light weight; it is often used on the ground of urban greenways to meet the construction needs of "sponge cities" and improve its anti-waterlogging level, while the surface of concrete bricks is used to bond the thin layer of cement of its aggregates, It affects the water permeability of concrete bricks, and the pollution generated during the cement manufacturing process requires additional treatment. [0003] In the cementless concrete bricks that have appear...

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Problems solved by technology

[0003] In the cementless concrete bricks that have appeared, the cement layer is removed on the surface and the coarse aggregate is directly bonded through the cementitious material inside the brick body. However, after a period of use, it will accumulate dust in the urban environment and damage the water permeability. The water permeability of the bricks, and the laying of the permeable bricks will form different heights under the change of the foundation soil layer and the force, which will affect the quality of the permeable brick floor

[0004] There are also some technical solutions about cement-free permeable concrete bricks in the prior art. For example, a Chinese patent with application number 2017114438852 discloses a cement-free permeable concrete brick, which belongs to the field of concrete and uses cheap alkali mud and mineral powder. Replacing cement can not only reduce the production cost of permeable concrete bricks, but also solve the environmental pollution problems of alkali mud and mineral powder. At the same time, the obtained cement-free permeable concrete bricks have high water permeability coefficient, good wear resistance and excellent compressive strength; The cementless permeable concrete brick includes alkali mud, mineral powder, water, stones, coarse salt, and high-performance water reducer; in parts by weight, the distribution ratio of each component is: alkali mud 80-100 parts, mineral powder 90-110 parts 90-120 parts of water, 1400-1500 parts of stones, 3.4-4.2 parts of coarse salt, 1.87-2.31 parts of high-performance water reducing agent; The problem of its water permeability

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