A high-performance permeable concrete system prepared from construction waste and its preparation method

Abstract

The invention provides a high-performance pervious concrete system prepared from construction waste and a preparing method thereof. The preparing method includes the steps that the construction waste is crushed, shaped and screened, and the construction waste is graded according to the particle size being smaller than 4.75 mm, 4.75-9.5 mm, 9.5-16 mm and 16-26.5 mm. The materials on all the layers are mixed according to the ratio, stirred uniformly and laid in the sequence of a base layer, a porous cement stable layer, a pervious concrete layer and a surface layer, the materials are rolled or rammed according to the standard after being laid on each layer, and then standard curing is carried out for 28 days to obtain the pervious concrete system. The usage amount of the construction waste in the pervious concrete system is 80-85%, the construction waste is fully used at a time, the use ratio is 100%, secondary products are avoided, and waste utilization and environment protection are achieved. The prepared pervious concrete system meets the standard about sponge city construction in China, and manufacturing cost is reduced substantially.

Description

technical field [0001] The invention relates to a high-performance permeable concrete system prepared from construction waste and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Statistics show that in the past three years, more than 360 cities across the country have suffered from waterlogging, and cities such as Beijing and Jinan have even experienced serious waterlogging that caused casualties. But at the same time, 1,100 cities across the country suffer from serious water shortages. The low urban drainage standards and the lack of rainwater utilization systems make the scarce resources of these cities an incentive for disasters to occur. Therefore, the country vigorously advocates the construction of sponge cities. When there is rainfall, the sponge city can give full play to the role of urban green spaces, roads, and water systems in absorbing, storing, and slowing down the release of rainwater, supplementing g...

AI Technical Summary

Problems solved by technology

Its comprehensive utilization rate is less than 5%. Part of the construction waste is used to prepare recycled aggregates and roadbed fillers, and most of it is piled up or landfilled. The overall recycling level is low, the quality of recycled products is poor, and the actual use range is limited.

However, this patent only uses construction waste to prepare aggregates of 10-25 mm, which is not fully utilized and does not break away from the limitations of making aggregates. At the same time, the strength of the prepared permeable concrete is C15, which cannot meet the current "Technical Regulations for Permeable Cement Concrete Pavement". "(CJJ / T 135-2009) stipulates that the permeable concrete grades used are C20 and C30.

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