Marine fair-faced concrete containing limestone powder and preparation method of concrete

Abstract

The invention discloses marine fair-faced concrete containing limestone powder. The marine fair-faced concrete is prepared from components as follows: a concrete additive, a mixed cementing material, aggregate and water, wherein the mixed cementing material is prepared from cement and a concrete admixture; the concrete admixture is prepared from the limestone powder and granulated blast-furnace slag powder, the added limestone powder accounts for 5%-20% of the total mass of the concrete, and the added granulated blast-furnace slag powder accounts for 15%-40% of the total mass of the concrete; the consumption of the cementing material is 320-450 kg / m<3>, and the ratio of water to the cementing material is 0.30-0.42. According to the fair-faced concrete, fly ash is replaced with the limestone powder, the problem of raw material shortage due to adoption of fly ash is solved, defects of the fair-faced concrete adopting the fly ash are also avoided, the homogeneity and the workability of the concrete are improved simultaneously, the concrete bleeding risk is reduced, the requirement for durability is met, the appearance quality of the concrete structure is stable, and the requirement for the appearance quality of the fair-faced concrete is met.

Description

technical field [0001] The invention belongs to the field of civil engineering construction, and is a marine engineering building material, in particular to a green high-performance marine engineering fair-faced concrete mixture using new materials. Background technique [0002] At present, for buildings (structures) that require high appearance quality, stone, glass curtain wall and steel structure are generally used as exterior wall decoration materials. In the marine environment (including islands, seaside towns, etc.), the durability of these decorative materials has serious problems, which not only affect the appearance, but also cause high maintenance costs, and even cause safety problems. [0003] Combined with the marine environment and green building design, the application of fair-faced concrete is becoming more and more extensive. Fair-faced concrete refers to concrete that directly uses the natural texture of concrete after one-time molding or only paints a colo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the lack of stability and texture of fair-faced concrete in the prior art, especially the problem of insufficient supply of raw material fly ash for fly ash fair-faced concrete, and to provide a limestone powder marine fair-faced concrete , to effectively solve the application problems of fair-faced concrete in marine engineering