Water-permeable concrete prepared by using regenerated aggregate

Abstract

The invention provides water-permeable concrete prepared by using regenerated aggregate. The water-permeable concrete prepared by using the regenerated aggregate comprises the following raw materialsin parts by weight: 160 to 400 parts of cement, 280 to 360 parts of fine sand, 15 to 30 parts of ultrafine microbeads, 20 to 70 parts of coal ash, 500 to 800 parts of regenerated crude aggregate, 200to 500 parts of natural crude aggregate, 2 to 8 parts of a water-reducing agent, 80 to 150 parts of water, 15 to 40 parts of composite toughening material, 0.01 to 0.03 part of a reducing and toughening agent and 3 to 15 parts of an inner curing agent. The regenerated aggregate water-permeable concrete is prepared by pouring the cement, the coal ash, the fine sand, the ultrafine microbeads, the regenerated crude aggregate, the natural crude aggregate, the inner curing agent and the composite toughening agent into a concrete stirring machine, dry-stirring for 30 to 60 seconds, adding the water,the water-reducing agent and the reducing and toughening agent, and continuously stirring for 60 to 120 seconds. The regenerated aggregate water-permeable concrete has high toughness and fatigue resistance, has high water permeability and is suitable for a sponge city to use; and due to use of the regenerated aggregate, the environmental protection property of the sponge city is greatly improved.

Description

technical field [0001] The invention relates to the technical field of recycled aggregate concrete, in particular to a permeable concrete prepared by utilizing recycled aggregate. Background technique [0002] With the development of my country's urbanization process, the discharge of construction waste is increasing year by year, and the proportion of renewable components is also increasing. However, most of the construction waste is transported to the suburbs or around the city for simple landfill or open storage without any treatment, which not only wastes land and resources, but also pollutes the environment; on the other hand, with the increasing population, The demand for sand and gravel aggregates in the construction industry continues to grow. For a long time, because sand and gravel aggregates are widely available and cheap, they are considered inexhaustible raw materials and have been exploited at will, resulting in resource depletion, landslides, riverbed diversi...

AI Technical Summary

Problems solved by technology

The recycled concrete prepared by this kind of recycled aggregate has a large amount of water, low strength after hardening, low elastic modulus, and durable properties such as impermeability, frost resistance, carbonation resistance, shrinkage, creep and chloride ion permeability. Average low? ordinary concrete

Due to the large difference in the quality of waste concrete, the performance of recycled aggregates prepared by simple processes is also large, which is not convenient for the promotion and application of recycled aggregates.

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