Sand-exposing concrete and preparation method thereof

Abstract

The invention provides sand-exposing concrete and a preparation method thereof. The sand-exposing concrete adopts a sand-exposing concrete surface hardening material, is subjected to erosion process treatment and comprises a sand-exposing face layer, a sand-exposing concrete surface hardening layer and a concrete base layer. The preparation method comprises the steps that the concrete base layer is cast in place; when the cast-in-place concrete base layer is going to initial setting, the sand-exposing concrete surface hardening material is spread, and after the sand-exposing concrete surface hardening material fully absorbs water to be wetted, trowelling and finishing are conducted; the concrete is subjected to moisture insulating and curing for 3 days, and thus the sand-exposing concretesurface hardening layer is formed; an aggressive agent is splashed on the sand-exposing concrete surface hardening layer, then washing treatment is conducted through a brush, and the sand-exposing face layer is formed; and the concrete is continued to be subjected to moisture insulating and curing for at least 7 days. According to the sand-exposing concrete and the preparation method thereof, sandgravels are exposed, thus the veneer effect is achieved, the sand-exposing face is even and flat, the problems that as for a traditional delayed-setting flushing process, the surface flatness is difficult to control, the exposed depths are not consistent, and sand exposing is uneven are avoided, and the sand-exposing concrete has the excellent mechanical properties, anti-skid performance, crack resistance and the like.

Description

Technical field [0001] The invention relates to the technical field of concrete manufacturing, in particular to an exposed sand concrete and a preparation method thereof. Background technique [0002] Decorative concrete is increasingly used in construction projects and floor paving projects. As a relatively mature product, exposed coarse aggregate concrete is more common in China; however, cement-based exposed sand / exposed fine aggregate concrete It is rarely encountered in China. Usually, sand and organic polymer adhesive are combined to form a common non-slip ground. The adhesive wraps sand particles and spreads on the ground to form a "sand" ground. The common exposed aggregate treatment process is the retarded washing method, that is, after the concrete is poured, a certain amount of retarder is sprayed on the surface, and after a certain period of time, the surface aggregate is exposed by washing with water. The traditional retarded washing process requires the concrete A ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of dew-sand concrete and its preparation method. The dew-sand concrete surface hardening material and erosion process are used to treat the dew-sand concrete to achieve the effect of decorative surface. It is difficult to control the surface flatness, inconsistent exposure depth, uneven sand exposure and other problems by the process method, and has excellent mechanical properties, anti-slip properties and anti-crack properties, etc.

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