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C30 grade steel slag powder self-consolidating concrete, preparation method and prefabricated component thereof

A technology of self-compacting concrete and steel slag powder, which is applied to the preparation of C30 grade steel slag powder self-compacting concrete and the field of C30 grade steel slag powder self-compacting concrete, can solve the problems of reduced metal components, difficulty in recycling, and no good utilization of waste steel slag. , to achieve good compaction, excellent homogeneity, and the effect of meeting the strength requirements

Inactive Publication Date: 2017-11-24
张家港市华诚混凝土构件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel slag is currently crushed, screened, and magnetically separated to recover the metal in it. After the metal is recovered, the metal content in the steel slag is greatly reduced. It is currently difficult to recycle and become waste steel slag
[0004] Waste steel slag does not have a good utilization method at present, so the present invention comes

Method used

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  • C30 grade steel slag powder self-consolidating concrete, preparation method and prefabricated component thereof
  • C30 grade steel slag powder self-consolidating concrete, preparation method and prefabricated component thereof

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preparation example Construction

[0079] The present invention also relates to a preparation method of C30 grade self-compacting concrete, comprising the following steps:

[0080] (1) Sorting, crushing and screening the waste concrete in the construction waste, sieving out the particles smaller than 9.50mm and larger than 20mm, and processing the aggregate particle size in the range of 10mm to 20mm to make recycled coarse aggregate ;

[0081] (2) In order to prevent sticking to the pot, weigh an appropriate amount of each material, mix concrete, wait until the inner wall of the mixer is glued with cement mortar, take out the concrete, and weigh material A, recycled coarse aggregate, natural coarse aggregate, water, powder Coal ash and admixture are fed in the order of recycled coarse aggregate, natural coarse aggregate, A material, fly ash and admixture, then start the mixer and dry mix for 1-10 minutes;

[0082] (3) Add the weighed water and additional water, and continue to stir for 1-10 minutes.

[0083] ...

Embodiment 1～16

[0094] (1) Prepare raw materials:

[0095] Cement: P O42.5 ordinary Portland cement, apparent density is 3.10g / cm 3 .

[0096] Fly ash: Class I fly ash, apparent density 2.04g / cm 3 .

[0097] Sand: medium sand with a fineness modulus of 2.36 and an apparent density of 2.65g / cm3 , bulk density is 1.45g / cm 3 , the moisture content is 0.4%.

[0098] 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%.

[0099] Regenerated coarse aggregate: After sorting, crushing and screening waste concrete in construction waste, and sieving out particles smaller than 9.50mm and larger than 20mm, the aggregate particle size is processed into recycled coarse aggregate with a particle size of 10mm to 20mm Aggregate, the apparent density is 2.35g / cm 3 , bulk density is 1.23g / cm 3 , The water absorption rate is 4.76%.

[0100] Steel slag powder: The waste s...

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Abstract

The invention provides a C30 grade steel slag powder self-consolidating concrete with a water-binder ratio controlled at 0.3-0.7. The C30 grade steel slag powder self-consolidating concrete comprises the following raw materials by weight: 1-10 parts of steel slag powder; 1-10 parts of talcum powder; 5-15 parts of cement; 20-30 parts of natural coarse aggregate; 6-15 parts of recycled coarse aggregate; 20-30 parts of sand; 1.5-3.5 parts of fly ash; 2-10 parts of water; and 0.001-0.1 part of a water reducing agent. The obtained self-consolidating concrete has good fluidity, gap passing ability, and segregation resistance, and meets the strength requirement. The concrete is convenient for construction, simultaneously the concrete production cost is lowered, and the preparation method is simple, and is suitable for industrial production.

Description

technical field [0001] The present application relates to the technical field of building materials, especially the technical field of new self-compacting concrete. Specifically, it relates to a C30 grade steel slag powder self-compacting concrete and a preparation method and application of C30 grade steel slag powder 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/141C04B14/042C04B14/02C04B18/16C04B14/06C04B18/08C04B22/002C04B2103/302
Inventor 张云法蔡梦帆石辉陈天明宋华
Owner 张家港市华诚混凝土构件有限公司
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