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Cement-based dry hard concrete using calcium fluoride sludge as aggregate

A technology of calcium fluoride and concrete, which is applied in the field of dry hard concrete, can solve the problems of excessive fluorine content in groundwater and increased fluoride concentration, and achieve the effects of reducing harm and burden, improving 28-day flexural strength, and protecting natural resources

Inactive Publication Date: 2021-05-28
娄城环保(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium fluoride is slightly soluble in water. Improper disposal will increase the concentration of fluoride in surface water and cause the fluoride content in groundwater to exceed the standard.

Method used

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  • Cement-based dry hard concrete using calcium fluoride sludge as aggregate
  • Cement-based dry hard concrete using calcium fluoride sludge as aggregate
  • Cement-based dry hard concrete using calcium fluoride sludge as aggregate

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A kind of cement-based dry hard concrete that utilizes calcium fluoride sludge as aggregate, by weight, by 270 parts of gelling agent (wherein 225 parts of cement, 45 parts of fly ash), 1530 parts of aggregate (wherein 353 parts of fluorine Calcium sludge, 1177 parts of stone chips), 1 part of water reducing agent, 0.2 part of adhesive (including 0.14 part of polyvinyl alcohol, 0.06 part of polyvinyl acetate), 150 parts of water, mixed and stirred evenly, and after molding, 28 days Conservation made.

Embodiment 2

[0032] A kind of cement-based dry hard concrete that utilizes calcium fluoride sludge as aggregate, by weight, by 270 parts of gelling agent (wherein 225 parts of cement, 45 parts of fly ash), 1530 parts of aggregate (wherein 200 parts of fluorine Calcium sludge, 1330 parts of stone chips), 1 part of water reducing agent, 0.2 part of binder (including 0.14 parts of polyvinyl alcohol, 0.06 parts of polyvinyl acetate), 150 parts of water, mixed and stirred evenly, and after molding, 28 days Conservation made.

Embodiment 3

[0034] A kind of cement-based dry hard concrete that utilizes calcium fluoride sludge as aggregate, by weight, consists of 270 parts of gelling agent (wherein 225 parts of cement, 45 parts of fly ash), 1530 parts of aggregate (wherein 475 parts of fluorine Calcium sludge, 1055 parts of stone chips), 1 part of water reducing agent, 0.2 part of adhesive (including 0.14 part of polyvinyl alcohol, 0.06 part of polyvinyl acetate), 150 parts of water, mixed and stirred evenly, and after molding, 28 days Conservation made.

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Abstract

The invention relates to cement-based dry hard concrete using calcium fluoride sludge as aggregate, which comprises the following components in parts by weight: 250-300 parts of gelling agent, 1450-1610 parts of aggregate, 0.5-1.5 parts of water reducing agent, 0.1-0.3 part of adhesive and 125-180 parts of water; wherein the gelling agent comprises cement and fly ash, the weight of the fly ash is 10-30% of the weight of the cement, and the aggregate comprises stone chips and calcium fluoride sludge; the weight of the calcium fluoride sludge is 15-45% of the weight of the stone chips, the adhesive comprises polyvinyl alcohol and polyvinyl acetate, and the weight of the polyvinyl acetate is 25-50% of the weight of the polyvinyl alcohol. The calcium fluoride sludge can be used for replacing part of natural aggregate needed in cement-based hard concrete production, the 28-day breaking strength and the 28-day compressive strength of the calcium fluoride sludge are greatly improved, the treatment method can fill up the shortage of sand and stone and protect natural resources; meanwhile, the calcium fluoride sludge can be well treated and can be recycled well, thereby reducing the damage and load on the environment.

Description

technical field [0001] The invention relates to the technical field of dry hard concrete, in particular to a cement-based dry hard concrete using calcium chloride sludge as an aggregate. Background technique [0002] Concrete, referred to as concrete, is a collective name for engineering composite materials that are aggregated into a whole by cementitious materials. It uses cement as cementitious material, sand and stone as aggregates, and can be mixed with water and admixtures in a certain proportion. It is obtained by mixing and is widely used in civil engineering. With the development of science and technology and the diversification of highway structures, more and more building materials have been widely used, and various types of concrete emerge in endlessly, among which the types of dry hard concrete products are becoming more and more abundant. The concrete whose slump is less than 10mm and the Vibe consistency value is in the range of 10-30s is called dry hard concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50
Inventor 陈贤德吴湛瞿国梁龚伟忠瞿国联王德洪闻轶辉钱春燕
Owner 娄城环保(苏州)有限公司