Preparation method for high-strength high-permeability concrete

Abstract

The invention relates to a preparation method for high-strength high-permeability concrete, and belongs to the technical field of road laying materials. The high-strength high-permeability concrete comprises the following raw materials in parts by weight: 1400-1600 parts of coarse aggregate, 150-210 parts of cement, 40-50 parts of rice hull ash, 10-20 parts of nano silicon dioxide, 50-70 parts ofcoal ash, 10-20 parts of fine slag, 150-210 parts of continuous grain size quartz sand, 45-65 parts of water, and 8-11 parts of a high-efficient water reducing agent, wherein the composition of the coarse aggregate is as follows: a proportion of single-grain-size granite gravels which have the framework support effect is 80%-90%, ceramsite with 2.36-9.5 mm of a size fraction which is capable of improving an internal maintenance environment is 5%-10%, and 2.36-4.75 mm of glass chips which are capable of increasing a bridging number between permeable concrete gravel bonding points are 5%-10%. After most compact slurry is formed, a mix proportion design for the permeable concrete is performed with the coarse aggregate under the guidance of an extra coefficient, so 28d compressive strength ofa prepared permeable concrete finished product is greater than 30 MPa on the basis of guaranteeing large permeability performance. The prepared permeable concrete has the excellent performance, and has the considerable economical and practical effect and promotional value.

Description

technical field [0001] The invention relates to a preparation method of high-strength and high-permeability concrete, which belongs to the technical field of road paving materials. Background technique [0002] With the development of my country's economy and the acceleration of urbanization, more and more areas of the city are covered by impermeable pavement. In addition to the convenience of people's walking, impermeable pavement also brings many negative effects: waterlogging during heavy rain , the "heat island effect" in summer, surface runoff that causes a serious drop in groundwater levels, and so on. There are various indications that ordinary closed and hardened pavements can no longer meet the needs of sustainable urban development, and it is urgent to develop water-permeable and air-permeable pavements. [0003] Permeable concrete is generally made of single-size aggregate and slurry (clean slurry or mortar) after mixing, in which the slurry is wrapped on the surf...

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Problems solved by technology

These ideas have played a certain role in the balance of mechanical properties and water permeability of pervious concrete, but the starting point of

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