High-strength self-compacting concrete suitable for steel-concrete combined section and preparation method of high-strength self-compacting concrete

A self-compacting concrete and steel-concrete combination technology, applied in the field of concrete, can solve problems such as difficulties in concrete pouring and vibration, non-adherence between concrete and steel structures, unfavorable structural bearing and durability, etc., and achieves simple preparation methods and increased fluidity , the effect of strong competitiveness

Pending Publication Date: 2022-07-01
山东高速基础设施建设有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since steel girders are mostly closed box structures, the pouring space is narrow, and there are generally many connectors such as perforated plate shear studs in steel box girders, and the existing design generally uses prestressed The connection of steel beams and concrete beams will inevitably lead to difficulties in concrete pouring and vibration, and it is easy to cause voids between concrete and steel structures; at the same time, the grade of concrete common

Method used

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  • High-strength self-compacting concrete suitable for steel-concrete combined section and preparation method of high-strength self-compacting concrete
  • High-strength self-compacting concrete suitable for steel-concrete combined section and preparation method of high-strength self-compacting concrete

Examples

Experimental program
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Example Embodiment

[0021] Example 1

[0022] The present embodiment provides a method for preparing a high-strength self-compacting concrete suitable for a steel-concrete joint section, comprising the following steps:

[0023] (1) Weigh the raw materials according to the following components in parts by weight: 200 parts of water, 850 parts of cement, 230 parts of silica fume, 120 parts of fly ash, 1000 parts of sand, 6 parts of water reducing agent, 55 parts of swelling agent and 100 parts of steel fiber share.

[0024] (2) Put cement, fly ash, silica fume, sand, water reducing agent and expansion agent into the mixer, and stir for 30s;

[0025] (3) Continue to add water and stir for 2 minutes, then add steel fiber and stir for 2 minutes, and it can be prepared after stirring evenly.

Example Embodiment

[0026] Example 2

[0027] The present embodiment provides a method for preparing high-strength self-compacting concrete suitable for a steel-concrete joint section, comprising the following steps:

[0028] (1) Weigh the raw materials according to the following components in parts by weight: 220 parts of water, 852 parts of cement, 245 parts of silica fume, 130 parts of fly ash, 1050 parts of sand, 8 parts of water reducing agent, 60 parts of swelling agent and 120 parts of steel fiber share.

[0029] (2) Put cement, fly ash, silica fume, sand, water reducing agent and expansion agent into the mixer, and stir for 45s;

[0030] (3) Continue to add water and stir for 3 minutes, then add steel fiber and stir for 3 minutes, and then it can be prepared after stirring evenly.

Example Embodiment

[0031] Example 3

[0032] The present embodiment provides a method for preparing a high-strength self-compacting concrete suitable for a steel-concrete joint section, comprising the following steps:

[0033] (1) Weigh the raw materials according to the following components in parts by weight: 250 parts of water, 855 parts of cement, 260 parts of silica fume, 145 parts of fly ash, 1100 parts of sand, 10 parts of water reducing agent, 65 parts of swelling agent and 130 parts of steel fiber share.

[0034] (2) Put cement, fly ash, silica fume, sand, water reducing agent and expansion agent into the mixer, and stir for 60s;

[0035] (3) Continue to add water and stir for 5 minutes, then add steel fibers and stir for 4 minutes, and the mixture can be prepared after stirring evenly.

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Abstract

The invention discloses high-strength self-compacting concrete suitable for a steel-concrete combined section and a preparation method of the high-strength self-compacting concrete. The high-strength self-compacting concrete comprises the following components in parts by weight: 200-250 parts of water, 850-855 parts of cement, 230-260 parts of silica fume, 120-145 parts of fly ash, 1000-1100 parts of sand, 6-10 parts of a water reducing agent, 55-65 parts of an expanding agent and 100-130 parts of steel fibers. The high-strength self-compacting concrete is reasonable and scientific in formula, the high-strength self-compacting concrete is prepared through specific components and dosage, the high-strength self-compacting concrete has high strength and high bending resistance, good fluidity and self-compacting performance in the construction process can be guaranteed, and meanwhile the design requirements for durability and the like of a combined section are met.

Description

technical field [0001] The invention belongs to the technical field of concrete, and particularly relates to a high-strength self-compacting concrete suitable for a steel-concrete joint section and a preparation method thereof. Background technique [0002] The steel-concrete combined section is one of the key technologies in the design and construction of hybrid bridges. The main function of this part is to ensure the uniformity of the stiffness transition between the steel beam and the concrete beam and the smoothness of the force transmission, avoid stress concentration and corner bending, and ensure The durability of the bridge. In the application of real bridges at home and abroad, some concrete cracks in the steel-concrete joint section have occurred. In order to ensure the rigidity transition and safety durability in the structure of the steel-concrete joint section, in addition to selecting an appropriate connection scheme in the structural design, the material The ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/52C04B18/08C04B18/146C04B14/06C04B14/48C04B22/142C04B2103/302
Inventor 任晓刚韩成博赵伟程浩付继凯任京华高全青
Owner 山东高速基础设施建设有限公司
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