Superfine common glass powder doped active powder concrete and preparation method thereof

Abstract

The invention provides superfine common glass powder doped active powder concrete which belongs to the field of building materials. The superfine common glass powder doped active powder concrete comprises cement, superfine common glass powder, silica fume, quartz powder, sand, water, a water reducer and steel fiber. The addition amount of raw materials is that the weight ratio of cement to superfine common glass powder to silica fume to quartz powder to sand to water to water reducer is 1:(0.10-0.20):(0.20-0.25):(0.35-0.40):(1.25-1.35):(0.35-0.40):(0.035-0.045). The doping amount of steel fiber is 1.50-2.50% of total volume of active powder concrete. The specific surface area of superfine common glass powder is greater than or equal to 450m<2> / kg. The invention further provides a preparation method of the active powder concrete. The compressive strength of the active powder concrete prepared by the method in the normal pressure thermal curing condition reaches 230-300MPa and the breaking strength is 35-45MPa. The compressive strength and the breaking strength are far greater than those of 200MPa level active powder concrete in engineering application in the prior art.

Description

technical field [0001] The invention relates to an active powder concrete mixed with superfine common glass powder, which belongs to the field of building materials. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of cement-based composite material with ultra-high strength, ultra-high performance and low porosity. It is based on the principle of maximum compactness and removes coarse aggregates. It is mainly made of cement, quartz powder, silica fume, sand, steel fiber and high-efficiency water reducer after mixing and forming, and then steam curing or autoclaving curing. RPC models can be divided into 200MPa, 500MPa and 800MPa grades according to the compressive strength. At present, 200MPa-grade RPC materials have been applied in some projects, while 500MPa-grade and 800MPa-grade RPC materials are in the stage of trial matching in the laboratory. [0003] The basic components of RPC are active powder and steel fiber, wherein the active powder m...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the high cost of reactive powder concrete in the prior art, and in practical engineering applications, the problem of low compressive strength of reactive powder concrete, and then provide a method that reduces the compressive strength by adding ultra-fine ordinary glass powder The cracking and cost of reactive powder concrete can also improve the compressive strength and flexural strength of reactive powder concrete under normal pressure heat curing conditions

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