High-strength pervious concrete and preparation method thereof

Abstract

The invention belongs to the technical field of road paving materials, and discloses high-strength pervious concrete and a preparation method of the pervious concrete. The pervious concrete comprises the following raw materials in parts by weight: 100-150 parts of cement, 300-450 parts of macadam, 30-50 parts of medium sand, 40-60 parts of water, 3-10 parts of polycarboxylic acid, 2-8 parts of slaked lime, 1-3 parts of water absorbent gel, 0.5-2 parts of soluble starch, 0.2-0.8 part of nano calcium oxide, and 0.05-0.1 part of an expanding agent. The pervious concrete is good in construction performance, high in porosity and good in wear resistance; the compressive strength reaches 30 MPa; the flexural strength reaches 3 MPa; a pervious coefficient reaches above 5 mm / s; various project demands with a pervious requirement for concrete can be met; ecological balance can be maintained; sustainable development can be realized.

Description

technical field [0001] The invention belongs to the technical field of road paving materials, in particular to a high-strength permeable concrete and a preparation method thereof. Background technique [0002] With the development of social economy and the continuous improvement of urbanization level, more and more urban surfaces are gradually covered by reinforced concrete buildings and impervious roads. Compared with natural soil, concrete pavement lacks the ability to breathe, absorb heat, and infiltrate rainwater, resulting in the inability of rainwater to penetrate into the ground, forming a large amount of water on the pavement and affecting the replenishment of urban groundwater, causing damage to the ecological environment. [0003] Permeable concrete is a new type of concrete born to make up for the impermeability of ordinary concrete. It is an environmentally friendly and ecological concrete material with water permeability and air permeability. It is mainly compos...

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Problems solved by technology

[0004] However, the strength of permeable concrete currently on the market is low, which cannot meet the requirements for laying high-performance pavements; the water permeability coefficient is low, generally lower than 10mm / s, which cannot meet the drainage requirements in rainy seasons, and it is easy to cause ground water phenomenon. ; In addition, ordinary permeable concrete has poor weather resistance, low freeze-thaw resistance, and is prone to freeze-thaw damage, which seriously hinders the application and development of permeable concrete