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Cement concrete pouring material for bridge framework

A cement concrete and bridge structure technology, which is applied in the field of cement concrete pouring materials for bridge structures, can solve the problems of lack of specific and unified standards and specifications, achieve the effects of mature production technology, improve early strength, and make up for the slow growth of early strength

Inactive Publication Date: 2008-06-18
THE 2ND ENG CO LTD OF CHINA RAILWAY 17 BUREAU GRP
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Problems solved by technology

However, how to prepare high-strength and high-performance cement concrete with special requirements, there are no specific and unified standards and norms in the country and industry

Method used

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  • Cement concrete pouring material for bridge framework

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Embodiment Construction

[0009] The present invention will be further described in detail below in conjunction with specific examples.

[0010] 1. Composition and formula

[0011] A cement concrete pouring material for a bridge structure, calculated in kilograms per cubic meter, comprising the following components: 340-469 kg of cement; 722-734 kg of sand; 1038-1061 kg of gravel; 60-120 kg of slag; 40kg; water-reducing agent 13-14; the rest is water, water-binder ratio is 0.28-0.31 [water-binder ratio refers to the weight ratio of water to (cement + slag + silica fume)]; plus polypropylene fiber 0.8kg / m 3 .

[0012] Within the scope of the above formulations, water-binder ratios of 0.31, 0.30, 0.29 and 0.28 were selected respectively to make 4 groups (16 formulations in each group) and 64 examples. The specific compositions are shown in Tables 1, 2, 3 and 4.

[0013] Table 1 Concrete mix when the water-binder ratio is 0.31

[0014]

Numbering

water-binder ratio

sand rate ...

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Abstract

The invention discloses a casting material of high-strength high-performance cement concrete which is prepared by general Portland cement and suitable for particular process requirements such as high structural stress, small section size, light large-span bridge, thin-wall high piers, high-floor buildings, underground water, and super-long distance pump conveyance. The invention is characterized in that: according to kilogram per stere calculation, the proportion of material components is the following: cement 340-469kg; sand 722-734kg; gravel 1038-1061kg; slag 60-120kg; silicon ash 25-40kg; water reducer 13-14kg; others are water, water-binder ratio is 0.28-0.31, additionally polypropylene fiber 0.8kg per cubic meter. The cement is Portland cement with strength grade of 42.5R; the gravel is limestone with both granule grade 5-10mm and granule grade 10-20mm that are prepared according to the weight proportion 3:7.

Description

technical field [0001] The invention relates to a cement concrete pouring material, in particular to a cement concrete pouring material for a bridge structure. Background technique [0002] At present, high-strength and high-performance cement concrete has been more and more recognized by the construction industry, and the simple improvement of the strength of cement concrete has long been solved in the construction industry. But how to prepare high-strength and high-performance cement concrete with special requirements, neither the country nor the industry has specific and unified standards and norms. In order to design high-strength and high-performance cement concrete that meets the requirements of specific projects, it is generally completed by referring to the "Ordinary Concrete Mix Design Regulations". Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a long-span bridge, thin-walled high piers, high-rise bui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B14/02C04B18/12C04B16/06
CPCC04B28/04Y02W30/91C04B14/06C04B14/28C04B16/0633C04B18/141C04B18/146C04B20/0096C04B2103/302
Inventor 韩新宇朱新广冀凤卿
Owner THE 2ND ENG CO LTD OF CHINA RAILWAY 17 BUREAU GRP
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