Long-acting high-permeability pervious concrete

Abstract

The invention provides long-acting high-permeability pervious concrete which has a long-term high permeable rate and a high anti-clogging rate. The pervious concrete comprises the following components in percentage by weight: 12-15% of ash concrete, 75-80% of a coarse aggregate, 5-10% of a water corrosion inhibitor, 1-2% of an active admixture, 0.3-0.5% of re-dispersible emulsion powder, 0.01-0.02% of cellulose ether and 0.2-0.3% of a water reducer, wherein the water corrosion inhibitor is prepared by uniformly mixing granular alum of which the particle size is 5-8mm and silicon phosphorus crystals according to a ratio of 1:(2-4) and then uniformly spraying a mixture of VAE emulsion, cement and water on particle surfaces, and the coarse aggregate is broken stones of which the particle size is 5-15mm. The pervious concrete provided by the invention adopts the combination of the water corrosion inhibitor and meta-kaolin to replace part of the coarse aggregate and cement so as to ensure the strength that the concrete should have, and utilizes the composition of the alum and silicon phosphorus crystals which greatly differ in water solubility as a corrosion inhibitor, and obtains a high initial porosity and a lasting pervious effect by virtue of the combination of rapid dissolution of the album and slow dissolution of the silicon phosphorus crystals.

Description

technical field [0001] The present invention relates to a kind of concrete, in particular to a kind of permeable concrete, more specifically to a kind of long-term high permeability permeable concrete with long-term high water permeability and high anti-clogging rate. Background technique [0002] In recent years, with the acceleration of urbanization and industrialization, there are many high-rise buildings and high population density. The ground is mostly covered with reinforced concrete, and the road surface is extremely poor in water permeability. The rapid increase in water volume has caused severe water accumulation in the city, and even caused waterlogging, which not only destroyed the original ecological environment, but also seriously affected the sanitation and transportation of the city. In recent years, it is common to see reports of shocking events such as severe losses of people's lives and property due to waterlogging in many large cities in China due to heavy...

AI Technical Summary

Problems solved by technology

Permeable concrete with upper and lower connected pores can effectively improve the heat balance of the surface and enhance the circulation of upper and lower water on the surface. It is of great significance to increase groundwater resources in cities, alleviate the heat island effect, and improve the urban climate. , the biggest problem is that the initial water permeability effect is good, but as time goes by, the sediment, dust, garbage, etc. brought in by the rainwater will gradually block the pores of the permeable concrete, making it lose the water seepage effect. The phenomenon is especially obvious in parks and other areas with more vegetation and denser people. Usually, the road surface completely loses the function of water seepage in two to three years.

In response to this phenomenon, the current solution is to use high-pressure water guns to flush regularly, but this method can only remove sand, dust and garbage on the concrete surface, and has no effect on the pores inside, and ultimately cannot ensure the continuity of water permeability , and repeated washing is easy to peel off the gravel on the surface of permeable concrete; the second is to renovate after removal, which is uneconomical and will also generate a lot of construction waste

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