A design method for the mix ratio of recycled permeable bricks based on the target permeability coefficient

Abstract

The invention discloses a recycled water permeable brick mix proportion design method based on a target water permeable coefficient, a skeleton model of a water permeable brick is fully considered, askeleton is built with recycled aggregate, aggregate gaps are filled with target pores, water, fly ash and cement, and meanwhile, the working performance of slurry under different porosities is ensured by adjusting the mixing amount of a water reducing agent. The method can determine the mix proportion of the regenerated water permeable bricks according to different water permeable coefficient requirements, is clear and clear in design idea and simple and convenient to operate, and better conforms to practical engineering application. Meanwhile, the recycled aggregate with the particle size of4.75-9.5 mm is adopted according to the mixing ratio, the requirements for water permeability and strength can be met, the utilization range of the recycled aggregate is widened, the raw materials are easy to obtain, and the cost is low. According to the invention, cement, water and fly ash are used as main bodies of the cementing material, and the difference between the density of the cement andthe density of the fly ash are fully considered, so that the water permeability coefficient of the regenerated water-permeable brick can be more accurately obtained according to the target water permeability coefficient.

Description

technical field [0001] The invention relates to a mixing ratio design method of recycled permeable bricks based on target water permeability coefficient, and belongs to the field of concrete mixing ratio design. Background technique [0002] With the introduction of the concept of "sponge city", the application of permeable bricks in the field of municipal engineering has gradually attracted people's attention. Permeable bricks have good water permeability and the strength of ordinary pavement bricks, which can not only meet the requirements of use but also greatly reduce the phenomenon of "seeing the sea" and "heat island effect" in cities. Rainwater penetrates from the surface layer of permeable bricks into the soil, which can reduce the The urban drainage system is loaded at the same time as the groundwater is replenished. On this basis, the recycled permeable bricks made of recycled aggregate reasonably combine the concept of waste utilization and environmental protecti...

AI Technical Summary

Problems solved by technology

However, this calculation method is affected by many factors such as porosity, coarse aggregate particle size and gradation, and vibration molding method, which makes the mix ratio design process more complicated, and it is difficult to achieve a reasonable balance between strength and water permeability.

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