Porous Sponge Concrete and Its Preparation Technology

Abstract

The invention provides porous sponge concrete which is characterized by comprising cement, coarse aggregate, water, a dispersing agent, a foaming agent, rubber powder and a porous sponge, wherein the weight ratio of the cement, the aggregate and the water is 1:(4-10):(0.2-0.5). The porous sponge concrete is prepared by the following steps: S1, weighing the cement, the coarse aggregate, the water, the dispersing agent, the foaming agent, the rubber powder and the porous sponge at a matching ratio for later use; S2, adding the cement, the coarse aggregate, the rubber powder and the foaming agent into a stirrer, performing dry mixing on the mixture for 10-20 s, then adding water into the mixture, continuously stirring for 20-30 s, adding the dispersing agent, continuously stirring for 60-120 s, adding the porous sponge into the mixture, stirring the mixture for 30-40 s and stopping stirring; S3, pouring slurry formed by uniform mixing in S2 into a forming mould, tamping the mixture in an insertion tamping manner and sending the forming mould into a maintenance room for maintenance, wherein the temperature of the maintenance environment is 17-23 DEG C, and the relative humidity of the maintenance environment is equal to or more than 90%; and S4, demoulding to obtain the porous sponge concrete. The prepared porous sponge concrete has the advantages that the using requirement can be met; and in addition, the temperature of the surface of a road can be effectively decreased, so that the porous sponge concrete has a positive effect of relieving a heat island effect.

Description

technical field [0001] The invention relates to the field of concrete materials, in particular to a porous sponge concrete and a preparation process thereof. Background technique [0002] The road area occupies a large part in urban construction, so the quality of the road surface plays a decisive factor in the urban environment, and a good road surface can effectively improve the "urban heat island effect". In the hot summer, the temperature of both asphalt pavement and cement pavement will be much higher than the air temperature. The reason is that the pavement fully absorbs heat under long-term sunlight, which will aggravate the "urban heat island effect". Therefore, improving the urban "heat island effect", reducing the impact on ecology, and saving water resources and cooling pavements will become the future development trend. One of the main measures to alleviate the urban heat island phenomenon is to develop new pavement structures and improve the pavement conditions...

AI Technical Summary

Problems solved by technology

[0004] However, porous cement concrete pavement also has its unique disadvantages: (1) porous cement concrete has low strength and limited bearing capacity; (2) porous cement concrete has strong corrosion resistance, but poor frost resistance; (3) porous cement concrete The pores are easily blocked, resulting in a decrease in porosity

[0005] Therefore, it is necessary to develop a material that is similar to porous concrete and can overcome the defects of low strength of porous concrete.