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C70 high-strength concrete and preparation method thereof

A high-strength concrete and compressive strength technology, applied in the field of concrete, can solve problems such as low utilization rate, limited resource utilization of sulfur-fixed ash, and resource shortage, and achieve the effects of reducing water demand, rich hydration products, and high resource value

Inactive Publication Date: 2018-12-18
成都宏基建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of increasing shortage of traditional cement admixture resources such as mineral powder, fly ash, and silica fume, and the problem of limited resource utilization and low utilization rate of sulfur-fixed ash, the present invention provides a C70 high-strength concrete and its preparation method

Method used

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  • C70 high-strength concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A C70 high-strength concrete composed of the following materials: 385 parts of cement, 80 parts of mineral powder, 30 parts of fly ash, 55 parts of sulfur ash, 1020 parts of coarse aggregate, 720 parts of fine aggregate, 3.6 parts of water reducing agent, 10 parts of rust inhibitor, 138 parts of water, in parts by weight.

[0043] The cement is selected from P.O 42.5 cement, provided by Dujiangyan Lafarge Cement Co., Ltd. The performance test results are as follows: standard consistency water requirement 26.7%, specific surface area 369m 2 ·Kg -1 , Initial setting time 170min, final setting time 246min, 3-day flexural strength 6.0MPa, 28-day flexural strength 8.3MPa, 3-day compressive strength 31.2MPa, 28-day compressive strength 50.1MPa, SO 3 The content is 2.03% (≤3.5%), the MgO content is 2.41% (≤5%), and the stability is qualified.

[0044] The slag powder is selected from S95 grade granulated blast furnace slag powder, which is provided by Chengdu Concrete New Building M...

Embodiment 2

[0056] A C70 high-strength concrete composed of the following materials: 372 parts of cement, 85 parts of mineral powder, 33 parts of fly ash, 60 parts of sulfur ash, 1020 parts of coarse aggregate, 720 parts of fine aggregate, 3.6 parts of water reducing agent, 10 parts of rust inhibitor, 138 parts of water, in parts by weight.

[0057] The cement is selected from P.O 42.5 cement, provided by Dujiangyan Lafarge Cement Co., Ltd. The performance test results are as follows: standard consistency water requirement 26.7%, specific surface area 369m 2 ·Kg -1 , Initial setting time 170min, final setting time 246min, 3-day flexural strength 6.0MPa, 28-day flexural strength 8.3MPa, 3-day compressive strength 31.2MPa, 28-day compressive strength 50.1MPa, SO 3 The content is 2.03% (≤3.5%), the MgO content is 2.41% (≤5%), and the stability is qualified.

[0058] The slag powder is selected from S95 grade granulated blast furnace slag powder, which is provided by Chengdu Concrete New Building M...

Embodiment 3

[0070] A C70 high-strength concrete composed of the following materials: 397 parts of cement, 75 parts of mineral powder, 28 parts of fly ash, 50 parts of sulfur-fixed ash, 1020 parts of coarse aggregate, 720 parts of fine aggregate, 3.6 parts of water reducing agent, 10 parts of rust inhibitor, 138 parts of water, in parts by weight.

[0071] The cement is selected from P.O 42.5 cement, provided by Dujiangyan Lafarge Cement Co., Ltd. The performance test results are as follows: standard consistency water requirement 26.7%, specific surface area 369m 2 ·Kg -1 , Initial setting time 170min, final setting time 246min, 3-day flexural strength 6.0MPa, 28-day flexural strength 8.3MPa, 3-day compressive strength 31.2MPa, 28-day compressive strength 50.1MPa, SO 3 The content is 2.03% (≤3.5%), the MgO content is 2.41% (≤5%), and the stability is qualified.

[0072] The slag powder is selected from S95 grade granulated blast furnace slag powder, which is provided by Chengdu Concrete New Buil...

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Abstract

The invention belongs to the field of concrete, and particularly discloses C70 high-strength concrete and a preparation method thereof. The concrete is prepared from the following materials in parts by weight: 365-415 parts of cement, 70-90 parts of mineral powder, 25-35 parts of coal ash, 40-60 parts of desulphurization ash, 950-1100 parts of coarse aggregate, 650-800 parts of fine aggregate, 3-4.5 parts of a water reducer, 5-12 parts of a corrosion inhibitor and 125-145 parts of water. The invention provides the C70 high-strength concrete; the concrete has a good slump, good extended degree,good compressive strength, and excellent comprehensive performance, and meanwhile, the problems of resource shortage of traditional cement admixtures of the mineral powder, the coal ash and the like,and limited resourced approaches and a low utilization rate of the desulphurization ash are solved.

Description

Technical field [0001] The invention belongs to the field of concrete, and specifically discloses a C70 high-strength concrete and a preparation method thereof. Background technique [0002] High-strength concrete is concrete with a compressive strength of 60MPa or more. As a new building material, high-strength concrete has been widely used in high-rise building structures, long-span bridge structures and some special structures due to its high compressive strength, strong deformation resistance, high density, and low porosity. application. [0003] At present, in the preparation technology of high-strength concrete, industrial solid wastes such as mineral powder, fly ash, silica fume, etc. are often used as cement admixtures, which are combined with ordinary Portland cement in a certain ratio as cementing materials. Compared with all using ordinary Portland cement as the cementing material, the incorporation of mineral powder, fly ash, silica fume, etc. can replace part of ordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2201/50C04B18/08C04B18/141C04B18/062C04B14/048C04B14/06C04B2103/302C04B2103/61
Inventor 肖超范长利张皓玉
Owner 成都宏基建材股份有限公司
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