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Expander

A technology of expansion agent and activator, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of secondary utilization of industrial waste residue with large water demand, fast hydration rate of expansion agent, large shrinkage drop, etc. problems, to achieve the effect of improving compressive strength and freeze-thaw resistance, not reducing strength, and increasing expansion

Inactive Publication Date: 2011-02-16
山西科腾环保新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the unfavorable factors such as fast hydration rate of the existing expansion agent, large early expansion, large shrinkage drop after expansion, delayed reaction, large water demand, and the need to strengthen wet curing, and the secondary utilization of industrial waste residues. Provide a new type of expansion agent produced by industrial waste residue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The raw materials and parts by weight of this example are: 35 parts of desulfurized gypsum slag, 30 parts of metal magnesium slag, 50 parts of carbide slag, 42 parts of fly ash, 8 parts of naphthalene-sulfonated high-efficiency water reducer, activator (sodium gluconate and methyl cellulose are prepared by weight 1:2) 0.075 parts.

Embodiment 2

[0019] Embodiment 2: The raw materials and parts by weight of this embodiment are: 20 parts of desulfurized gypsum slag, 25 parts of metal magnesium slag, 30 parts of carbide slag, 35 parts of fly ash, 5 parts of naphthalene-sulfonated high-efficiency water reducer, activator (sodium gluconate and methyl cellulose are prepared by weight 1:2) 0.05 parts.

Embodiment 3

[0020] Embodiment 3: The raw materials and parts by weight of this embodiment are: 50 parts of desulfurization gypsum slag, 45 parts of metal magnesium slag, 60 parts of carbide slag, 50 parts of fly ash, 10 parts of naphthalenesulfon-based high-efficiency water reducer, activator A little (sodium gluconate + methylcellulose prepared by weight 1:2) 0.1 parts.

[0021] The preparation method of the above embodiment: dry various raw materials, mix them according to the ratio of raw materials, and grind until the Blaine specific surface area is 400-500m 2 / kg, promptly obtains the expansion agent of the present invention.

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PUM

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Abstract

The invention discloses an expander. The expander is characterized by consisting of the following raw materials in part by weight: 20 to 50 parts of desulfurized gypsum dregs, 25 to 45 parts of metal magnesium dregs, 30 to 60 parts of calcium carbide dregs, 35 to 50 parts of fly ash, 5 to 10 parts of efficient water reducer and 0.05 to 0.1 part of exciting agent, wherein the efficient water reducer is a naphthalene sulphonate series efficient water reducer; and the exciting agent is prepared by mixing sodium gluconate and methylcellulose according to a weight ratio of 1:2. The expander has the advantages of low mixed proportion, low alkaline amount, high expansion property, high strength, low slump loss and the like; and as the expander is mainly prepared from industrial residues, the product cost is reduced, the industrial residues can be reutilized at the same time, and the problem of environmental pollution is solved.

Description

technical field [0001] The invention belongs to the technical field of building auxiliary materials, and in particular relates to a novel expansion agent. Background technique [0002] The widely used concrete expansion agent on the market in our country is mainly the sulfate type expansion agent based on ettringite, which has many advantages in application, but it also has fast hydration rate, large early expansion, and large shrinkage drop after expansion. , and unfavorable factors such as delayed ettringite reaction, large water demand, and the need to strengthen wet curing. The early expansion of the ettringite type expansion agent is too fast, which determines that this type of concrete expansion agent can only play a role under limited conditions. [0003] Industrial waste refers to the solid waste produced in the industrial production process. If it is not used, a large amount of stockpiling will not only occupy land resources, but also cause serious air pollution, s...

Claims

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Application Information

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IPC IPC(8): C04B24/38
CPCC04B40/0039C04B22/008C04B22/145Y02W30/91C04B18/08C04B18/141C04B18/144C04B28/00C04B2103/10C04B2103/302C04B24/10C04B24/226C04B24/383
Inventor 程芳琴侯红串武英袁立志袁博
Owner 山西科腾环保新材料股份有限公司