Steel fiber self-compacting concrete and preparation method thereof, and prefabricated member

A self-compacting concrete and steel fiber technology, applied in the field of building materials, can solve the problems of small and no increase in compressive strength, and achieve the effects of good compaction, reduced wear and high mechanical strength

Active Publication Date: 2020-02-07
苏州港松建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the steel fiber self-compacting concrete in the prior art can solve the crack resistance and tensile properties, from another perspective, the compressive strength of the steel fiber self-compacting concrete has little or no improvement.

Method used

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  • Steel fiber self-compacting concrete and preparation method thereof, and prefabricated member
  • Steel fiber self-compacting concrete and preparation method thereof, and prefabricated member
  • Steel fiber self-compacting concrete and preparation method thereof, and prefabricated member

Examples

Experimental program
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Effect test

Embodiment 1～16

[0101] (1) Prepare raw materials:

[0102] Magnetic beads: iron oxide body after strong magnetic treatment, with a particle size of 2-5mm.

[0103] Cement: P O42.5 ordinary Portland cement, apparent density is 3.10g / cm 3 .

[0104] Fly ash: Class I fly ash, apparent density 2.04g / cm 3 .

[0105] Sand: medium sand with a fineness modulus of 2.36 and an apparent density of 2.65g / cm 3 , bulk density is 1.45g / cm 3 , the moisture content is 0.4%.

[0106] Natural coarse aggregate: crushed stone with a continuous particle size of 5-20mm, and an apparent density of 2.75g / cm 3 , bulk density is 1.35g / cm 3 , The water absorption rate is 0.45%.

[0107] Short steel fiber: 0.06cm in diameter, 0.6-1.8cm in length, the shape can be straight steel fiber (a), prismatic steel fiber (b), corrugated steel fiber (c), hook-shaped steel fiber ( d / e), large-headed steel fibers (f), double-pointed steel fibers (g), bundled steel fibers (h), etc., were purchased from the market.

[0108] Th...

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Abstract

The invention provides a steel fiber self-compacting concrete, wherein the water-binder ratio of the concrete is controlled to be 0.3-0.7. The concrete is prepared from, by weight, 1-5 parts of 3-20 mm short steel fiber, 0.5-3 parts of magnetic beads, 1-4 parts of non-metallic fiber, 23-27 parts of natural coarse aggregate, 20-22.5 parts of sand, 10-14 parts of cement, 1.5-3.5 parts of fly ash, 4-8 parts of water, and 0.001-0.160 part of water reducing agent. The obtained high performance self-compacting concrete not only has simple production processes, but also can meet requirements on compressive strength and tensile performance.

Description

technical field [0001] The present application relates to the technical field of building materials, especially the technical field of novel self-compacting concrete, and specifically relates to a steel fiber self-compacting concrete and a preparation method and application of the steel fiber self-compacting concrete. Background technique [0002] Self-compacting concrete (Self-Consolidating Concrete referred to as SCC) refers to the concrete that can flow and compact under its own gravity, even if there are dense steel bars, it can completely fill the formwork, obtain good homogeneity, and do not require additional vibration. The preparation of self-compacting concrete is generally through the selection and matching of admixtures, cementing materials, coarse and fine aggregates, and a reasonable mix ratio design, so that the yield stress of the concrete is reduced enough to be overcome by the shear stress due to its own weight, and the fluidity of the concrete is increased. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/08C04B14/30C04B14/48C04B14/42C04B14/46C04B20/00
CPCC04B14/308C04B20/0052C04B28/04C04B28/08C04B18/08C04B14/06C04B14/02C04B24/24C04B22/002C04B20/0016C04B14/48C04B14/42C04B14/46C04B14/4625
Inventor 马剑潘荣楠蔡梦帆石辉陈天明王欢
Owner 苏州港松建材有限公司
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