Mineral admixture for high durable concrete

A durable concrete and mineral technology, applied in the field of concrete additives, can solve the problems of poor design, poor construction quality, improper maintenance, etc., and achieve the effect of improving compactness, durability and strength

Inactive Publication Date: 2012-05-16
XINJIANG YANKE ENERGY SAVING TECH
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Problems solved by technology

In addition, poor design, poor construction quality or...

Method used

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Embodiment 1

[0011] Embodiment 1: two kinds of materials of silica fume and calcium hydroxide are mixed according to the ratio, wherein the weight portion of silica fume is 20%-50%, and the rest is calcium hydroxide; that is, the corresponding dosage of calcium hydroxide is selected at 50%-80% %.

[0012] As a better choice, the fineness of silica fume is 18000m 2 / Kg, the silicon dioxide content is more than 85%; the calcium hydroxide fineness is 0.045, and the sieve residue is not more than 4g, and the purity is 90%.

[0013] When the above mixture is in use, the total dosage is 3%-6% of each square concrete cementitious material, and it is additionally blended.

[0014] The technical process of the above mixture preparation includes: adding the raw materials that meet the standards into the mixing equipment according to the proportion, after mixing, it must be ensured to be uniform, and then packaged for delivery.

[0015] The above silica fume is a mineral raw material whose main com...

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Abstract

A mineral admixture for high durable concrete. Two materials of siliceous dust and calcium hydrate are mixed according to a proportion, wherein the siliceous dust accounts for 20-50 weight parts and the balance is calcium hydrate. The fineness of the siliceous dust: its specific surface area is 18000m<2>/Kg. The content of silica is greater than 85%. The fineness of calcium hydrate is 0.045. The screen over-size is not greater than 4g. The purity is 90%. The fine siliceous dust and calcium hydrate are mixed according to a certain proportion to form the novel mineral admixture based on secondary hydration effect and micro-aggregate effect. The addition of the mineral admixture in cement contributes to cement strength and performance mainly in three aspects as follows: pozzolanic effect, particle filling effect and interface effect can greatly raise density of high-performance concrete and enhance durability and strength of high-performance concrete.

Description

Technical field: [0001] The invention belongs to the technical field of concrete additives, and relates to an additive prepared by processing and mixing mineral raw materials, in particular to a durable concrete mineral additive. Background technique: [0002] Concrete, referred to as concrete for short, refers to the collective name of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, the term concrete refers to cement as cementing material, sand and stone as aggregate; mixed with water, with or without admixtures and admixtures in a certain proportion, obtained by stirring, molding and curing Cement concrete, also known as ordinary concrete, is widely used in civil engineering. The so-called cement is the calcareous raw material (CaCO 3 ) and clay materials (SiO 2 +Al 2 o 3 +Fe 2 o 3 ) According to the chemical composition and the type of cement to be made, the proportion of ingredients is de...

Claims

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Application Information

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IPC IPC(8): C04B22/06
Inventor 袁芬李恒超王怀义张超贾佳
Owner XINJIANG YANKE ENERGY SAVING TECH
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