High freezing resistance water permeable concrete additive and preparation method thereof

Abstract

The invention belongs to the technical field of concrete additives and relates to a high freezing resistance water permeable concrete additive and a preparation method thereof. The high freezing resistance water permeable concrete additive consists of the following components in parts by weight: 5-10 parts of mixing materials, 0.5-10 parts of a water reduction agent, 0.1-1 part of a thickening agent and 3-6 parts of a water repellent agent, wherein the mixing material is silicon ash or coal ash; and the granularity of the mixing material is 300-400 meshes. The preparation method comprises thefollowing steps: mixing the mixing material, the water reduction agent, the thickening agent and the water repellent agent according to the parts by weight, grinding, stirring the mixed material at amedium speed till the components are uniform, and discharging. The additive provided by the invention is capable of enriching fine capillary cavities and micro cracks in a cementing layer of water permeable concrete, improving the strength of a cement adhesive layer, and improving the strength of the water permeable concrete, so that the freezing resistance of the concrete is improved. In addition, due to adoption of the water repellant agent, a water repellant surface is formed on the surface of the cementing layer of concrete, so that water inside the concrete can be well discharged, and thefreezing resistance and the water permeability of the concrete are improved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular relates to a concrete admixture and a preparation method thereof, in particular to a high antifreeze permeable concrete admixture and a preparation method thereof. Background technique [0002] Permeable concrete is an ecological and environmentally friendly concrete. It is a concrete with continuous pores made through material research and selection and a special process. It has a certain strength and a certain degree of air permeability. It can coexist harmoniously with the natural environment, and it is a pavement material for human beings to construct a comfortable living environment. [0003] With the development of urban construction, the sharp increase in hardened ground has led to a sharp decrease in urban sponges, destroying the ecological balance, and losing the functions of water storage and flood diversion. In recent years, with the advancement of the "spong...

AI Technical Summary

Problems solved by technology

The use of ordinary permeable concrete in the severe cold areas of the north has caused its service life to decrease sharply due to the problem of frost heave

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