Fair faced concrete

Abstract

The invention discloses a fair faced concrete which comprises the following ingredients in parts by mass: 292-310 parts of cement, 66-74 parts of pulverized fuel ash, 38-42 parts of slag powder, 1072-1192 parts of coarse aggregate, 697-769 parts of fine aggregate, 142-158 parts of tap water and 7.8-8.6 parts of water reducer. The concrete is clean and tidy in surface and natural in color and can achieve an excellent decorative effect without plastering or veneering to varnish the surface.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to fair-faced concrete. Background technique [0002] Concrete, referred to as concrete, refers to the collective name of a kind of engineering composite material that aggregates are cemented into a whole by cementitious materials. Usually, concrete is made of cement as cementitious material, sand and stone as aggregate, and water is mixed in a certain proportion. , the cement concrete obtained by mixing, the above-mentioned aggregates are divided into coarse aggregates and fine aggregates, among them, the aggregates in sand and stones with a particle size greater than 5 mm that play a skeleton role in concrete are called coarse aggregates; Coarse aggregates commonly used in concrete include gravel and pebbles. Crushed stone is made of natural rocks, pebbles or mine waste rocks through mechanical crushing and screening, and the particle size is larger than 5mm. Pebbles...

AI Technical Summary

Problems solved by technology

The existing fair-faced concrete mix ratios are all carried out with the ordinary concrete mix ratio design method (such as "JGJ 55-2011 Ordinary Concrete Mix Ratio Design Regulations"), and the amount of various ingredients is adjusted as appropriate, resulting in the surface of the poured clear-water concrete Rough and uneven everywhere, large color difference, large pores and gaps and uneven distribution, or while obtaining surface quality, the strength of concrete cannot be guaranteed, it is difficult to meet the design requirements of fair-faced concrete, and it is impossible to directly use cast-in-place concrete The natural surface effect is used as a finish, and traditional plastering, veneering and other whitewashing processes are still required