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Green and environment-friendly compound admixture for concrete

A composite admixture, green and environmentally friendly technology, which is applied in the field of composite admixtures for concrete, can solve the problems of undiscovered recycling of composite admixtures for concrete, and achieve the effects of low manufacturing cost, simple process, and cost reduction

Inactive Publication Date: 2017-08-08
张建 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the waste water produced in the production process of ready-mixed concrete has not been found to be recycled for the production of composite admixtures for concrete.

Method used

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  • Green and environment-friendly compound admixture for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The common type III grade composite admixture produced by the green and environment-friendly concrete composite admixture formula of the present invention, its formula components and its mass percentage content are:

[0023] Cement clinker 5%, concrete filter residue 60%, waste concrete test block 34.5%, grinding aid 0.5%.

[0024] The cement clinker, concrete filter slag and waste concrete test blocks were dried and crushed respectively, mixed according to mass percentage content, then added with grinding aid, then ground and homogenized, and the fineness was controlled to be 0.045mm square hole sieve The sieve residue is less than 30%, and the compound admixture for common type III concrete of this embodiment is obtained. The composite admixture inspection result for the concrete of embodiment 1 is as follows:

[0025]

Embodiment 2

[0027] The common type II grade composite admixture produced by the green and environment-friendly concrete composite admixture formula of the present invention, its formula components and their mass percentage contents are:

[0028] Cement clinker 8-10%, concrete filter residue 29.5%, waste concrete test block 58%-60%, grinding aid 0.5%. The sum of the mass percentages of the above-mentioned components is 100%.

[0029] The cement clinker, concrete filter slag and waste concrete test blocks were dried and crushed respectively, mixed according to mass percentage content, then added with grinding aid, then ground and homogenized, and the fineness was controlled to be 0.045mm square hole sieve The sieve residue is less than 25%, and the compound admixture for ordinary type II concrete of this embodiment is obtained which is green and environment-friendly. The composite admixture inspection result for the concrete of embodiment 2 is as follows:

[0030]

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Abstract

The invention discloses a green and environment-friendly compound admixture for concrete. The green and environment-friendly compound admixture is prepared from the following components in percentage by mass: 5 percent to 20 percent of cement clinker, 10 percent to 80 percent of concrete filter residue, 10 percent to 80 percent of a waste concrete test block and 0.1 percent to 0.5 percent of a grinding aid; the sum of the mass percent of all the components is 100 percent; the concrete filter residue is filter residue formed by recycling wastewater of a pre-mixed concrete production enterprise, precipitating, carrying out filter pressing and dehydrating; the waste concrete test block is a waste material formed by detecting and testing a test piece which is molded by the concrete and is used for detecting the compressive strength. According to the compound admixture disclosed by the invention, the green and environment-friendly compound admixture for the concrete, which meets national standard technical specifications, is manufactured with low cost by utilizing a lot of wastes and the like.

Description

technical field [0001] The invention belongs to the field of concrete, in particular to a green and environment-friendly composite admixture for concrete. Background technique [0002] Composite admixtures for concrete are mainly used to produce ready-mixed concrete. According to the standard requirements of the construction industry standard JG / T486-2015 "Composite admixtures for concrete" promulgated by the Ministry of Housing and Urban-Rural Development, masonry cement is composed of two or two The above mineral admixtures are mixed in a certain proportion to form a uniform powder material; or two or more mineral raw materials are mixed in a certain proportion, and if necessary, an appropriate amount of gypsum and grinding aid can be added, and then ground Powder materials to a certain fineness. [0003] At present, the waste water generated in the production process of ready-mixed concrete has not been found to be recycled for the production of composite admixtures for ...

Claims

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Application Information

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IPC IPC(8): C04B18/16
CPCC04B40/0042C04B7/02C04B18/167C04B2103/0068Y02W30/91
Inventor 张建杜秋明
Owner 张建
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