Permeable concrete and preparation process thereof

Abstract

The invention relates to the technical field of concrete, and particularly discloses a permeable concrete and a preparation process thereof. The permeable concrete comprises the following components in parts by weight: 800-1000 parts of coarse aggregate; 75-100 parts of water; 300-400 parts of Portland cement; 20-30 parts of a hydrophobic agent; 4-6 parts of a water reducing agent; 4-6 parts of anair entraining agent; and 5-8 parts of a buffer agent. The preparation process of the permeable concrete comprises the following steps: step 1, mixing and stirring the coarse aggregate and the Portland cement in proportion, then adding water and the water reducing agent in proportion, and stirring; step 2, adding the air entraining agent, the hydrophobic agent, the buffer agent and a self-repairing material into the mixture obtained in the step 1 in proportion, stirring, and controlling the stirring speed to be 100 r / min, so as to obtain a premix; and step 3, stirring the premix obtained in the step 2, controlling the stirring speed to be 100 r / min, paving the premix on a construction surface, and carrying out maintenance, compaction and molding to obtain the permeable concrete. The permeable concrete provided by the invention has the advantage of good frost resistance.

Description

technical field [0001] This application relates to the technical field of concrete, more specifically, it relates to a kind of permeable concrete and its preparation process. Background technique [0002] At present, permeable concrete is also called porous concrete, porous continuous greening concrete or sand-free concrete. It is usually prepared by mixing single-size coarse aggregate, cement or other cementitious materials, water and admixtures in a certain proportion, and in a specific molding method. An ecological concrete with multi-connected pores. [0003] The Chinese invention patent with the publication number CN110482921A discloses a kind of permeable concrete, which is prepared from the following components: 1500-1600 parts of coarse aggregate, 320-420 parts of adhesive material, 105-114 parts of water and reduced Aqua 4.5-5.9 parts. The above-mentioned pervious concrete further improves the mechanical properties, wear resistance and anti-corrosion performance o...

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Problems solved by technology

[0005] In order to improve the problem that the above-mentioned permeable concrete may cause local frost heaving and cracking when it is applied to the sponge city, the application provides a permeable concrete and its preparation process

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