C30-level steel slag sand self compact concrete and preparing method thereof and prefabricated part

A technology of self-compacting concrete and steel slag sand, which is applied in the preparation field of C30 grade steel slag sand self-compacting concrete and C30 grade steel slag sand self-compacting concrete. , to achieve excellent homogeneity, meet strength requirements, and good compactness

CN107352906AInactive Publication Date: 2017-11-17张家港市华诚混凝土构件有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-11-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides C30-level steel slag sand self compact concrete. The water-binder ratio of the concrete is controlled between 0.3-0.7, and is prepared from, by weight, 2-10 parts of steel slag sand, 2-10 parts of glass beads, 2-10 parts of cement, 5-7 parts of natural coarse aggregate, 2-5 parts of recycled coarse aggregate, 2-10 parts of sand, 1.3-1.7 parts of coal ash and 2-10 parts of water. The obtained C30-level steel slag sand self compact concrete is good in fluidity, passing performance through gaps and segregation resistance, and meets the intensity requirement; construction is convenient, and meanwhile the production cost of the concrete is reduced, and the preparing method is simple and suitable for commercial process.
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Description

technical field

[0001] The application relates to the technical field of building materials, particularly the technical field of novel self-compacting concrete, and specifically relates to a preparation method and application of C30 grade steel slag sand self-compacting concrete and C30 grade steel slag sand 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, and can completely fill the formwork even if there are dense steel bars, and at the same time 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 flu...

Examples

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, feed in the order of recycled coarse aggregate, natural coarse aggregate, material A, and fly ash, 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] Glossary

[0084] The cem...

Embodiment 1～16

[0096] (1) Prepare raw materials:

[0097] Cement: P O42.5 ordinary Portland cement, apparent density is 3.10g / cm 3 .

[0098] Fly ash: Class I fly ash, apparent density 2.04g / cm 3 .

[0099] Glass beads: purchased from outside, with a density of 0.1-0.25g / cm 3 .

[0100] 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%.

[0101] 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%.

[0102] 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...