A kind of permeable cement concrete and its construction method

Abstract

Belonging to the technical field of concrete, the invention provides a water permeable cement concrete and a construction method thereof. The water permeable cement concrete consists of the following raw materials by weight: cement, recycled concrete coarse aggregate, stone, water, fly ash, a water reducer, isocyanate modified phenolic resin, short fiber and sodium bentonite. The water permeable cement concrete provided by the invention uses waste concrete and stone cooperatively to replace natural coarse aggregate, and takes the isocyanate modified phenolic resin as the binder, the added short fiber ensures the water permeability of concrete and simultaneously improves the coarse aggregate interface state of the cementitious material, and improves the concrete strength. The used composite water reducer effectively reduces the use of water under the premise of guaranteeing the concrete flowability and workability, and improves the project quality. The sodium bentonite is used as a thickener, can increase the coagulating force between all the materials, also can be used in combination with other components, and plays a role of strengthening, thickening, tackifying and water retention.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a permeable cement concrete and a construction method thereof. Background technique [0002] With the development of economy and society and the process of urban construction, the surface of modern cities is gradually covered by reinforced concrete buildings and impermeable pavement. The groundwater is replenished very well, coupled with the excessive extraction of groundwater, the urban road surface is easy to sink; and the rainwater is discharged through the drainage ditch. When there is heavy rain or heavy rain, the rainwater will collect on the road surface, and a large amount of it will be concentrated on the motor vehicle and bicycle lanes. Cause large areas of water on the road surface; and the existing concrete road surface is generally dense in structure, and the tire noise is loud. When the vehicle is running at high speed, the tire will press air into the space betwee...

AI Technical Summary

Problems solved by technology

[0002] With the development of economy and society and the process of urban construction, the surface of modern cities is gradually covered by reinforced concrete buildings and impermeable pavement, which will hinder the infiltration of rainwater in rainy weather, making rainwater unable The groundwater is replenished very well, coupled with the excessive extraction of groundwater, the urban road surface is easy to sink; and the rainwater is discharged through the drainage ditch. When there is heavy rain or heavy rain, the rainwater will gather on the road surface and concentrate in large quantities on the motor vehicle and bicycle lanes. Cause large areas of water on the road surface; and the existing concrete pavement is generally dense in structure, and the tire noise is loud. When the vehicle is running at high speed, when the tire rolls in, the air will be pressed into the space between the tire and the road surface. When the tire rolls over, the air will quickly The noise is caused by expansion, especially in rainy days, which affects the life and work of residents

While the existing cement concrete brings people convenient transportation facilities and smooth paved roads to bring great convenience to people's travel, these impermeable roads also bring great negative effects to the ecological environment of the city. The ecological artificial desert is formed because it makes the water ecology unable to circulate normally, breaks the balance of the urban ecosystem, and affects the normal growth of vegetation.

[0003] In addition, with the progress of municipal construction, a large amount of waste concrete is produced every day. At present, due to the difficulty in handling waste concrete, poor viscosity, easy cracks on the pavement, it cannot be used with the raw materials in new concrete, and the source is miscellaneous. Its treatment is mainly open-air stacking or landfill, causing secondary pollution. If these waste concrete can be recycled and used for road laying without reducing performance, it will not only save costs, but also reduce the removal and disposal of construction waste. costs and reduce environmental pollution