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Steel fiber concrete with high fracture resistance and preparation method thereof

A technology of steel fiber concrete and high flexural resistance, applied in the field of concrete, can solve the problems of not meeting the performance index requirements of high flexural steel fiber concrete, and achieve the effect of reducing the thickness of the road surface, reducing the cost of the project, and good construction workability

Inactive Publication Date: 2016-08-17
SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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  • Abstract
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  • Claims
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Problems solved by technology

However, the flexural strength of traditional steel fiber reinforced concrete can reach 10 MPa, which cannot meet the performance index requirements of high flexural steel fiber reinforced concrete

Method used

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  • Steel fiber concrete with high fracture resistance and preparation method thereof

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Embodiment 1

[0037] Embodiment 1; A kind of high flexural steel fiber concrete, raw material composition and weight are as follows:

[0038]

[0039] The preparation method of high flexural steel fiber reinforced concrete comprises the following steps:

[0040] (1) Weighing: Weigh the raw materials according to the mix ratio;

[0041] (2) Stirring: first add stones and sand and stir for 15s, then add steel fiber and continue stirring for 20s, then add silica fume and fly ash and stir for 25s, finally add admixture and water, and continue stirring for 35s to form steel fiber concrete.

[0042] (3) Pouring molding: under the action of the plate vibrator, the construction and molding of the steel fiber concrete mixture is completed. At the same time, complete the 400mm×100mm×100mm flexural test block, standardize for 28 days, take out the test block, and test the flexural strength.

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Abstract

The invention discloses steel fiber concrete with high fracture resistance and a preparation method thereof. The steel fiber concrete comprises matrix concrete and steel fiber, and is characterized in that: the volume percent content of the steel fiber is 3.5%; and the used raw materials comprise the following materials by weight: 125-175Kg of water, 500-542Kg of cement, 25-38Kg of silica fume, 40-60Kg of fly ash, 500-662Kg of sand, 800-953Kg of stone, 10-16Kg of a pumping agent, and 250-273Kg of steel fiber. During stirring of concrete production, the steel fiber in the steel fiber concrete disclosed by the invention cannot agglomerate easily, so that the steel fiber concrete has good construction workability and can meet pouring construction requirements; the breaking strength of the concrete is greatly improved, high-performance concrete with the breaking strength of 20MPa is successfully prepared, and under an equal strength condition, the thickness of a concrete pavement is reduced, and the construction cost is reduced. This special type of concrete can be applied to construction parts with high requirements on crack control, toughening and shock resistance, and can be widely applied to road, bridge and pavement constructions.

Description

technical field [0001] The invention belongs to the technical field of concrete, and specifically relates to a steel fiber concrete; the concrete can be widely used in road surface projects such as bridges and airports. Background technique [0002] Steel fiber reinforced concrete is a new type of multiphase composite material formed by adding randomly distributed steel fibers into ordinary concrete. These randomly distributed steel fibers can effectively inhibit the expansion of micro-cracks and the formation of macro-cracks in concrete, and significantly improve the tensile, bending, impact and fatigue resistance of concrete. Steel fiber reinforced concrete has good ductility and dynamic performance. However, the flexural strength of traditional steel fiber reinforced concrete can reach 10 MPa, which cannot meet the performance index requirements of high flexural steel fiber reinforced concrete. For this reason, the present invention has developed a steel fiber concret...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C04B14/06C04B14/48C04B18/08C04B18/14
CPCC04B28/04C04B18/146C04B18/08C04B14/06C04B14/02C04B14/48Y02W30/91
Inventor 吴鑫刘登贤桂根生麻鹏飞雷辉
Owner SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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