Water permeable concrete and pavement construction method

Abstract

The invention discloses permeable concrete and a pavement construction method. The permeable concrete comprises the following components: 1350 to 1800 parts of broken stones, 90 to 150 parts of water, 300 to 350 parts of cement, 10 to 70 parts of mineral powder, 10 to 70 parts of silicon ash and 0.3 to 7 parts of water reducing agent; if necessary, organic intensifying agent can be added. The construction method comprises the following steps: permeable concrete is mixed, poured and cured, an expansion joint is cut, and the filling and the other processes are performed. Concrete pavement prepared by the method has higher strength and water permeability, and the compression strength can reach or exceed 30 MPa; the flexural strength is above 4 MPa; the coefficient of water permeability is more than or equal to 1 mm / s; the requirements for the permeable concrete pavement can be fully satisfied. The permeable concrete is suitable for the construction of permeable concrete pavement, squares and parking lots; by adopting the method, the consumption of cement is small, the construction is simple, and the method is favorable for being popularized.

Description

Water-permeable concrete and pavement construction method 1. Technical field: The invention relates to a concrete and a construction method, in particular to a permeable concrete and a road surface construction method. 2. Background technology: Permeable concrete is a kind of porous lightweight concrete made by mixing aggregate, cement and water. It does not contain fine aggregate, and the surface of coarse aggregate is covered with a thin layer of cement paste to bond with each other to form a uniform distribution of pores. The honeycomb structure has the characteristics of air permeability, water permeability and light weight. As an environmental load-reducing concrete, the research and development of permeable concrete has attracted more and more attention. With the development of economy and the acceleration of urban construction, the surface of modern cities is gradually covered by buildings and concrete pavement. Convenient transportation facilities and paved roads...

AI Technical Summary

Problems solved by technology

Since the 1990s, domestic research on permeable concrete pavement materials has begun, but so far, permeable concrete bricks are mainly used to pave sidewalks, while paving roads and squares using domestic materials and construction techniques have not yet reached the level of practical application.

There are the following difficulties when permeable concrete is used in road engineering: (1) It is difficult to ensure a relatively high compressive strength due to the large honeycomb structure inside the permeable concrete; (2) Due to the action of gravity, the cement slurry will Falling into the bottom of the concrete, blocking the water-permeable gap, resulting in a decrease in water-permeability, or even impermeability

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