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Concrete anti-segregation method

A concrete and anti-segregation technology, applied in the field of concrete, can solve the problems affecting the construction performance of concrete pumping, reducing economic benefits, and affecting the construction period, etc., to achieve the effects of improving conveying performance and construction performance, reducing labor intensity, and no pollution residue

Inactive Publication Date: 2017-03-22
贵州建工混凝土有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete segregation will affect the pumping performance of concrete, cause sticking of tanks, blockage of pipes, affect the construction period, etc., and reduce economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Source of raw materials: The cement is 42.5-grade ordinary Portland cement produced by Guizhou Taiwan Cement, and its performance meets the requirements of GB175-2007; the methylene blue value of the sand is 1.2, the fineness modulus is 2.9, the gradation area is the second area, and the gravel It is a continuous gradation of 5-31.5mm, and the fly ash is selected as the secondary ash of Jinsha Power Plant. Polyacrylamide with a molecular weight of 2.5 million.

[0013] The mix ratio of C30 segregated concrete is shown in Table 1: the polycarboxylate superplasticizer is overmixed.

[0014] Table 1 per 1m 3 The mass of each raw material of segregated concrete (unit: kg)

[0015]

[0016] Add 4.4kg of cement, 1.42kg of fly ash, 0.92kg of mineral powder, 0.54kg of silica fume, 18kg of sand, 20.3kg of gravel, 6.2kg of water, and 280g of polycarboxylate superplasticizer into a concrete mixer with a capacity of 60L and stir for 4 minutes. After the concrete stays in the ...

Embodiment 2

[0020] The source of raw materials is the same as in Example 1.

[0021] The mix ratio of C30 segregated concrete is shown in Table 3: too much water is added.

[0022] Table 3 per 1m 3 The mass of each raw material of segregated concrete (unit: kg)

[0023]

[0024] Add 4.4kg of cement, 1.42kg of fly ash, 0.92kg of mineral powder, 0.54kg of silica fume, 18kg of sand, 20.3kg of stone, 6.2kg of water, and 210g of polycarboxylate superplasticizer into a concrete mixer with a capacity of 60L and stir for 4 minutes. After the concrete stayed in the mixer for 0.5 hours, its properties were described in Table 2. After that, 1.0 g of polyacrylamide was added, stirred for 2 minutes, poured out, and the properties of the mixture were measured. The properties are shown in Table 4.

[0025] Table 4 Performance description of concrete before and after segregation treatment

[0026]

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Abstract

The invention relates to a concrete anti-segregation method. The method is characterized in that when concrete is segregated, polyacrylamide is added after metering in the segregated concrete, workability of the segregated concrete is improved, the construction performance is improved, so that the segregated concrete has good cohesive force and can reach the construction requirement; 30-80 g of polyacrylamide is added in each 1 m<3> of the concrete, the molecular weight of polyacrylamide is 1 million-3 millions; and the intensity of the segregated concrete is C30-C70. The method has the advantages that 1) the concrete anti-segregation effect is obvious, the conveying performance and construction performance can be rapidly improved when the concrete is segregated; 2) the operation is simple, the usage of polyacrylamide is convenient; 3) the labor intensity of the building workers is reduced; and 4) no pollution residue is generated. The concrete anti-segregation method is suitable for all the building construction units for using the concrete.

Description

technical field [0001] This invention relates to concrete and, in particular, to concrete that resists segregation using organic materials as active ingredients. Background technique [0002] As we all know, concrete is the largest building material, and the segregation of concrete mainly comes from two aspects. Concrete segregation is a phenomenon in which the cohesion between the constituent materials of the concrete mixture is insufficient to resist the sinking of the coarse aggregate, and the components of the concrete mixture are separated from each other, resulting in uneven internal composition and structure. It usually shows that the coarse aggregate and the mortar separate from each other, such as the deposition of dense particles to the bottom of the mixture, or the overall separation of the coarse aggregate from the mixture. Concrete segregation will affect the pumping performance of concrete, cause sticking of tanks, blockage of pipes, affect the construction pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B28/04
CPCC04B28/04C04B24/2652C04B2103/44C04B18/08C04B14/02C04B18/146C04B14/06C04B2103/302
Inventor 曾宪才秦贤顺周英刚杨睿蔡波吴关胜杨立志范志强赵喜政申燕珊
Owner 贵州建工混凝土有限责任公司
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