River-sand basalt-fiber active powder concrete and preparation method thereof

Abstract

The invention discloses river-sand basalt-fiber active powder concrete and a preparation method thereof. The river-sand basalt-fiber active powder concrete is prepared from the following components inparts by weight: 750 to 950 parts of cementing material, 1,200 to 1,500 parts of river sand, 40 to 55 parts of water reducer, 150 to 190 parts of water and 20 to 40 parts of composite fiber or 15 to35 parts of basalt fiber subjected to surface spraying treatment, wherein the cementing material is prepared from cement, pulverized fuel ash, mineral powder and silica fume, which are further in a weight ratio of (4 to 7) to (2 to 3.5) to (1 to 2.5) to (1 to 2.5); the composite fiber is prepared from a basalt fiber and a polyvinyl alcohol fiber; the basalt fiber subjected to the surface sprayingtreatment refers to a basalt fiber treated by using an organic silicon oiliness additive. The invention also provides the preparation method of the active powder concrete. A finished product is prepared through soaking the fiber, pre-homogenizing the cementing material, curing with water and thermally curing with steam. The finished product is obviously improved in main mechanical performance, hasfavorable corrosion resistance, high and low temperature resistance and weather resistance at the same, is stable in performance, is green and environmentally friendly, and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of ultra-high performance concrete, in particular to a river sand basalt fiber active powder concrete and a preparation method thereof. Background technique [0002] Reactive powder concrete is a new type of ultra-high performance concrete with ultra-high strength, high toughness, high durability, good volume stability, and broad application prospects. Traditional active powder concrete is mainly made of cementitious materials (cement, silica fume, fly ash, mineral powder, etc.), quartz sand (or river sand), water reducing agent, water, and steel fibers, and the production technology is relatively mature. . Although the steel fiber reactive powder concrete produced has good performance, it has high cost, heavy weight and poor corrosion resistance. With the advancement of technology, reactive powder concrete prepared solely with steel fibers has been difficult to meet people's requirements for concrete to m...

AI Technical Summary

Problems solved by technology

Although the steel fiber reactive powder concrete produced has good performance, it has high cost, heavy weight and poor corrosion resistance

With the advancement of technology, reactive powder concrete prepared solely with steel fibers has been difficult to meet people's requirements for the stability and high performance of concrete in various harsh working environments

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