A cement matrix for concrete canvas systems

Abstract

The invention discloses a cement matrix for a concrete canvas system. The cement matrix is ​​composed of the following components in parts by weight: industrial waste residue: 55-65 parts, water glass: 28-38 parts parts, gelling agent: 8.5 parts to 12.5 parts, shrinkage reducing agent: 8 parts to 12 parts; the invention solves the problem of alkali loss of alkali-activated cementitious materials, and realizes that the alkali-activated slag system becomes a new cement matrix of concrete canvas, realizing Recycling of industrial waste residues reduces carbon emissions and environmental pollution; the product of the present invention has a compressive strength of 25 MPa in the thickness direction and a compressive strength of 40 MPa in the warp direction after molding and curing for 10 days, reaching the level of sulphoaluminate cement concrete canvas The strength level; the post-drying shrinkage is reduced by more than 90%.

Description

technical field [0001] The invention relates to the technical field of concrete canvas materials, in particular to a cement matrix used in a concrete canvas system. Background technique [0002] Concrete canvas is a new type of building material. It is prepared by filling cement powder materials into three-dimensional spacer fabrics. During the construction process, it can be exposed to water on its surface to form architectural structures of various shapes; the new stage of concrete canvas is mainly used in projects where traditional concrete is inconvenient for construction. Such as mountain slope protection, ditch slope, underwater pipeline maintenance and other projects. In addition, concrete canvas is low in cost, excellent in performance, fast in construction speed, requires a small number of construction personnel, and has simple construction equipment, so it has a good prospect. [0003] The alkali-activated slag system is a new type of cementitious material. Becau...

AI Technical Summary

Problems solved by technology

However, because of the high energy consumption and high pollution environmental problems in the production process of this kind of cement, it is not conducive to sustainable development.

The alkali-activated slag cementitious material as a cement matrix can realize waste utilization on the one hand and exhibit excellent performance on the other hand; but if the alkali-activated cementitious material used in the alkali-activated concrete system is directly applied to the concrete canvas After sprinkling water, it was found that the powder of the alkali-activated cementitious material was lost in large quantities, resulting in the powder remaining in the three-dimensional fabric of the concrete canvas unable to solidify

[0005] Under normal temperature curing, the drying shrinkage of alkali-activated cementitious materials is 4 to 6 times that of Portland cement, which seriously restricts the application of alkali-activated concrete in practical engineering.

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