Preparation method of anti-freezing and anti-cracking concrete

Abstract

The invention belongs to the technical field of concrete processing, and particularly relates to a preparation method of anti-freezing and anti-cracking concrete. The method comprises the following steps: S1, carrying out crushing treatment on regenerated aggregate; s2, the regenerated aggregate is subjected to magnetic separation through a separation machine, and waste steel and iron materials are screened out; s3, the recycled aggregate sorted in the S2 is poured into a recycled concrete preparation device from the top to be washed; s4, in the process that the recycled aggregate flows through the multiple filter plates, the recycled aggregate is subjected to multi-stage filter pressing, mortar is collected in the aggregate bin, and gravel is left among the multiple filter plates and finally collected; and S5, changing flowing gaps among the plurality of filter plates, so that mortar with relatively fine granularity is firstly collected and then is added into early strength Portland cement, fly ash, broken stones, mineral powder, a water reducing agent and an anti-freezing agent are mixed, and finally basalt fibers are added to prepare the anti-freezing and anti-cracking concrete. The mortar with relatively fine granularity can be effectively utilized in the process of preparing the anti-freezing and anti-cracking concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete processing, and specifically relates to a method for preparing frost-resistant and crack-resistant concrete. Background technique [0002] Concrete is a brittle material with high compressive strength and relatively low tensile strength. With the development and progress in the field of construction technology, more requirements are put forward for concrete, an important building material. Therefore, for high strength, high toughness, high The demand for crack resistance, high durability, and high volume stability is gradually increasing. On the other hand, the utilization of recycled aggregates has gradually become the current pursuit direction for the gradual increase in environmental protection requirements; the graded washing and reuse of recycled aggregates, It can effectively utilize mortar with fine particle size; the existing application number is 2020109356017, a recycled aggregate concr...

AI Technical Summary

Problems solved by technology

[0002] Concrete is a brittle material with high compressive strength and relatively low tensile strength. With the development and progress in the field of construction technology, more requirements are put forward for concrete, an important building material. Therefore, for high strength, high toughness, high The demand for crack resistance, high durability, and high volume stability is gradually increasing. On the other hand, the utilization of recycled aggregates has gradually become the current pursuit direction for the gradual increase in environmental protection requirements; the graded washing and reuse of recycled aggregates, It can effectively utilize mortar with fine particle size; the existing application number is 2020109356017, a recycled aggregate concrete preparation process; The recycled aggregate concrete preparation device of the discharge mechanism uses the recycled aggregate concrete preparation device to wash the sieved recycled aggregate during use, and uses the filter screen and partition to classify and clean the recycled aggregate, so that the recycled aggregate The sediment on the surface can be fully and completely removed; however, the equipment has the problem of not being able to fully squeeze the recycled aggregate, it needs a long washing time, and the effect of the filter screen on the mortar is poor

Images