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Environment-friendly high-strength self-compacting fair-faced concrete for bridge bent cap and preparation process thereof

A clean-faced concrete, green and environmentally friendly technology, applied in the direction of clay preparation equipment, manufacturing tools, ceramic molding machines, etc., to achieve the effect of high cost performance, low manufacturing cost, and easy pouring

Inactive Publication Date: 2019-12-13
中建西部建设新疆有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Self-compacting fair-faced concrete requires the advantages of both self-compacting and clear water, but the actual application is full of contradictions and problems

Method used

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  • Environment-friendly high-strength self-compacting fair-faced concrete for bridge bent cap and preparation process thereof
  • Environment-friendly high-strength self-compacting fair-faced concrete for bridge bent cap and preparation process thereof
  • Environment-friendly high-strength self-compacting fair-faced concrete for bridge bent cap and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-strength self-compacting fair-faced concrete, the mix ratio is as follows (unit: kg / m 3 ), numbered 1:

[0030]

[0031]

[0032] The admixture consists of water-reducing component (PCA-JS02 water-reducing polycarboxylate superplasticizer), defoaming component (DF-2006 defoamer) and slump-retaining component (PCA-BT02 slump-retaining polycarboxylate acid superplasticizer) composition; the bulk density of the high-strength self-compacting fair-faced concrete is 2445kg / m 3 , the water-binder ratio is 0.32, and the sand rate is 50%.

Embodiment 2

[0034]A high-strength self-compacting fair-faced concrete, the mix ratio is as follows (unit: kg / m 3 ), numbered 2:

[0035]

[0036] The admixture consists of water-reducing component (PCA-JS02 water-reducing polycarboxylate superplasticizer), defoaming component (DF-2006 defoamer) and slump-retaining component (PCA-BT02 slump-retaining polycarboxylate acid superplasticizer) composition; the bulk density of the high-strength self-compacting fair-faced concrete is 2445kg / m 3 , the water-binder ratio is 0.32, and the sand rate is 47%.

Embodiment 3

[0038] A high-strength self-compacting fair-faced concrete, the mix ratio is as follows (unit: kg / m 3 ), numbered 3:

[0039]

[0040]

[0041] The admixture consists of water-reducing component (PCA-JS02 water-reducing polycarboxylate superplasticizer), defoaming component (DF-2006 defoamer) and slump-retaining component (PCA-BT02 slump-retaining polycarboxylate acid superplasticizer) composition; the bulk density of the high-strength self-compacting fair-faced concrete is 2445kg / m 3 , the water-binder ratio is 0.32, and the sand rate is 47%.

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Abstract

The invention belongs to the technical field of concrete foundation engineering, and particularly relates to environment-friendly high-strength self-compacting fair-faced concrete for a bridge bent cap and a preparation process thereof. The high-strength self-compacting fair-faced concrete comprises 500-550 parts of a cementing material per cubic meter, 740-880 parts of fine aggregate per cubic meter, 880-1020 parts of coarse aggregate per cubic meter and 9.36-10.40 parts of an additive per cubic meter. The cementing material comprises 360-400 parts of cement per cubic meter, 50-75 parts of mineral powder S75 per cubic meter and 65-90 parts of II-grade fly ash per cubic meter. The concrete disclosed by the invention is relatively good in apparent properties, basically consistent in color and free of obvious color difference; basically no repair trace exists; the maximum diameter of surface bubbles is not more than 5 mm, the depth of surface bubbles is not more than 2 mm, and the area of each square meter of bubbles is not more than 12 cm<2>; and the concrete is free of obvious cracks, slurry leakage, flowing and scouring traces, oil stains, ink marks, rust spots and pulverized substances.

Description

technical field [0001] The invention belongs to the technical field of concrete infrastructure engineering, and in particular relates to a green and environment-friendly high-strength self-compacting clear-water concrete for bridge cover beams and a preparation process thereof. Background technique [0002] In order to meet the development requirements of national engineering construction, self-compacting concrete performance research and application practice have been carried out more widely in the world, and applied in many projects. At present, the types of self-compacting concrete that have been successfully developed include: architectural self-compacting concrete, high-strength self-compacting concrete, large-volume self-compacting concrete, prefabricated lightweight self-compacting concrete, shrinkage-compensated self-compacting concrete, self-compacting steel fiber concrete, "sandwich" Self-compacting concrete and recycled aggregate self-compacting concrete, etc. Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B28B7/38B28C5/00
CPCC04B28/04B28C5/003B28B7/384C04B2201/50C04B2111/00017
Inventor 孟书灵卢霄张平王军艾洪祥李凯王子萌
Owner 中建西部建设新疆有限公司
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