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Self-compacting concrete and design method of mixing proportion thereof

A technology of self-compacting concrete and mixing ratio design, applied in the field of concrete for building pouring, can solve problems such as many uncertain factors and difficult control, and achieve the effect of improving flow performance

Inactive Publication Date: 2012-06-20
HEFEI TIANZHU BAOHE SPECIAL CONCRETE
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AI Technical Summary

Problems solved by technology

Due to the restraint of the above-mentioned technical route, the method adopted has many uncertain factors, and it is difficult to control in actual production

Method used

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  • Self-compacting concrete and design method of mixing proportion thereof
  • Self-compacting concrete and design method of mixing proportion thereof
  • Self-compacting concrete and design method of mixing proportion thereof

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Embodiment

[0041] The present invention is aimed at the self-compacting concrete of different strength grades and adopts the raw material mixing of different proportions to form, as shown in Table 1, in the table are the proportions of self-compacting concrete of C60, C70 and C80 three kinds of intensities:

[0042] Table 1

[0043]

[0044] A kind of mix ratio design method of self-compacting concrete among the present invention, adopts following steps:

[0045] a) According to the statistical standard deviation σ of the concrete strength of the same label, use the following formula to calculate the preparation strength of self-compacting concrete:

[0046] f cu，0 ≥f cu，k +1.645σ,

[0047] When the design strength grade is greater than or equal to C60, the preparation strength shall be calculated according to the following formula:

[0048] f cu，0 ≥1.15f cu，k ;

[0049] where f cu，0 - concrete preparation strength, f cu，k - concrete cube compressive strength, σ - standard de...

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Abstract

The invention relates to the technical field of concrete for building casting, specifically to self-compacting concrete and a design method of the mixing proportion of the concrete. The invention is characterized in that the self-compacting concrete is prepared by uniformly stirring the following raw materials in mixing proportion: 300-400kg / m<3> of cement, 70-150kg / m<3> of fly ash, 70-150kg / m<3> of mineral powder, 0-50kg / m<3> of silicon powder, 750-850kg / m<3> of sand, 850-1050kg / m<3> of stone, 4.4-28kg / m<3> of additive and 150-175kg / m<3> of water. Compared with the prior art, the self-compacting concrete disclosed by the invention has obviously improved flowing property, self-compacting property and durability of the concrete mixture, and is particularly applicable to the engineering structures limited by the construction operation space such as the structures with high casting quantity, large casting depth and height, complex shape, densely arranged reinforcing bars, thin walls, concrete-filled steel tubes and the like.

Description

technical field [0001] The invention relates to the technical field of concrete for building pouring, in particular to a self-compacting concrete and a mixing ratio design method thereof. Background technique [0002] Self-compacting concrete is an important direction for the development of concrete in the future. Through the research and promotion of self-compacting concrete, material innovation can lead the development of building structure design and construction technology, and produce significant economic and social benefits. In order to implement the construction technology of "energy saving, land saving, material saving and water saving" proposed by the Party Central Committee, the State Council, the provincial party committee and the provincial government, implement the scientific development concept of time and time in the concrete industry, and solve the stream flow caused by conventional concrete materials Problems, building materials that meet the requirements of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 张琪
Owner HEFEI TIANZHU BAOHE SPECIAL CONCRETE
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