Slag powder-doped composition for preparing white facing as-cast finish concrete

Abstract

The invention discloses a slag powder-doped composition for preparing white facing as-cast finish concrete. The composition is characterized by consisting of the following components in parts by weight: 180-260 parts of cement, 85-110 parts of water, 330-390 parts of sand, 500-580 parts of stone, 2.0-4.0 parts of additive, 1 part of titanium dioxide and 20-60 parts of slag powder. In the composition disclosed by the invention, the proportion of the components is more scientific and reasonable, and the working performance meets the requirements on concrete pumping and pouring; and moreover, the bleeding and separation are avoided, the shrinkage is low, and the formed concrete is dense and has strong texture. With the formula, the large-flow regime white as-cast finish concrete has the advantages of good fluidity, good workability, good water-retaining property, low slump loss, strong pumpability and the like in concrete construction; and the strength of the formed concrete can be guaranteed, the surface gloss is good, and the chromatic aberration meets the requirement on the quality of the facing as-cast finish concrete.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a composition for preparing white facing clear-water concrete mixed with slag powder. The composition formula is used to prepare large-fluid white clear-water concrete, which has good fluidity during concrete construction, and Good workability, good water retention, small loss of slump over time, strong pumpability, etc., can ensure the strength of the formed concrete, good surface gloss, and color difference to meet the quality requirements of facing concrete. Background technique [0002] Fair-faced concrete, also known as decorative concrete, belongs to one-time pouring molding, without any external decoration, and directly uses the natural surface effect of cast-in-place concrete as the finish, so it is different from ordinary concrete, with smooth surface, uniform color, sharp edges and corners, and no damage And pollution, just apply one or two lay...

AI Technical Summary

Problems solved by technology

[0005] Existing fair-faced concrete rarely uses white clear-water concrete technology. Due to the unreasonable component formula and the special properties of white Portland cement, the white clear-water concrete prepared with white Portland cement has a surface texture that is difficult to control. Defects such as large color difference and large loss of slump over time

[0006] The Chinese patent 201010511486.7 filed by the applicant in 2010 describes a formula for preparing white-faced fair-faced concrete composition mixed with fly ash, which has the advantages of good fluidity, workability, and water retention during concrete construction. However, because fly ash does not have its own hydration and hardening characteristics, it can only have strength under the action of active activators (such as Portland cement, etc.), and fly ash uses "excess" instead of cement to ensure concrete If the strength reaches the standard, it will cause disadvantages such as large amount of white cement, large water demand, and large shrinkage of concrete itself.

Images