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Formula and preparation method for renewable concrete

A technology of recycled concrete and water-reducing agent, applied in the field of concrete, can solve the problems of cracking of recycled concrete, high water absorption rate of recycled concrete, and poor bonding between aggregate and cement, and achieve the effect of promoting strength, increasing strength and improving strength.

Inactive Publication Date: 2020-08-25
江苏鹿晶新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when waste concrete is used as the aggregate of recycled concrete, the interfacial pores are more than those of natural aggregate, and the water absorption rate of recycled concrete is relatively high, which will make the aggregate and cement not tightly bonded, making waste concrete Recycled concrete used as aggregate is prone to cracking

Method used

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  • Formula and preparation method for renewable concrete
  • Formula and preparation method for renewable concrete
  • Formula and preparation method for renewable concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The renewable concrete proposed by the present invention comprises the following raw materials in parts by weight:

[0039] 100 parts of Portland cement, 15 parts of fly ash, 100 parts of river sand, 4 parts of polycarboxylate superplasticizer, 5 parts of shrinkage reducing agent, 200 parts of coarse aggregate, 100 parts of fine aggregate, 5 parts of polyester fiber, 5 parts of steel fiber, 5 parts of straw ash, 50 parts of water;

[0040] Both the coarse aggregate and the fine aggregate are obtained from waste concrete after crushing and grinding, and the particle diameter of the coarse aggregate is 20mm, and the particle diameter of the fine aggregate is 8mm.

[0041] The shrinkage reducing agent comprises the following raw materials in parts by weight: 10 parts of water glass, 15 parts of oxyalkylene compound, 1 part of comb polymer, and 5 parts of polyethylene glycol.

[0042] The method steps for the preparation of renewable concrete proposed by the present invent...

Embodiment 2

[0049] The renewable concrete proposed by the present invention comprises the following raw materials in parts by weight:

[0050] 150 parts of Portland cement, 35 parts of fly ash, 200 parts of river sand, 8 parts of polycarboxylate superplasticizer, 15 parts of shrinkage reducing agent, 400 parts of coarse aggregate, 200 parts of fine aggregate, 10 parts of polyester fiber, 15 parts of steel fiber, 15 parts of straw ash, 80 parts of water;

[0051] Both the coarse aggregate and the fine aggregate are obtained from waste concrete after crushing and grinding, and the particle diameter of the coarse aggregate is 20mm, and the particle diameter of the fine aggregate is 8mm.

[0052] The shrinkage reducing agent comprises the following raw materials in parts by weight: 20 parts of water glass, 20 parts of oxyalkylene compound, 5 parts of comb polymer, and 15 parts of polyethylene glycol.

[0053] The method steps for the preparation of renewable concrete proposed by the present ...

Embodiment 3

[0060] The renewable concrete proposed by the present invention comprises the following raw materials in parts by weight:

[0061] 120 parts of Portland cement, 25 parts of fly ash, 150 parts of river sand, 6 parts of polycarboxylate superplasticizer, 10 parts of shrinkage reducing agent, 300 parts of coarse aggregate, 150 parts of fine aggregate, 8 parts of polyester fiber, 10 parts of steel fiber, 10 parts of straw ash, 65 parts of water;

[0062] Both the coarse aggregate and the fine aggregate are obtained from waste concrete after crushing and grinding, and the particle diameter of the coarse aggregate is 20mm, and the particle diameter of the fine aggregate is 8mm.

[0063] The shrinkage reducing agent comprises the following raw materials in parts by weight: 15 parts of water glass, 18 parts of oxyalkylene compound, 3 parts of comb polymer, and 10 parts of polyethylene glycol.

[0064] The method steps for the preparation of renewable concrete proposed by the present i...

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Abstract

The invention discloses a formula and preparation method for renewable concrete. The formula comprises the following raw materials in parts by weight: 100-150 parts of Portland cement, 15-35 parts offly ash, 100-200 parts of river sand, 4-8 parts of a water reducing agent, 5-15 parts of a shrinkage reducing agent, 200-400 parts of coarse aggregate, 100-200 parts of fine aggregate, 5-10 parts of polyester fibers, 5-15 parts of steel fibers, 5-15 parts of straw ash and 50-80 parts of water, wherein the coarse aggregate and the fine aggregate are both prepared by crushing and grinding waste concrete, the particle size of the coarse aggregate is 18-22 mm, and the particle size of the fine aggregate is 5-10 mm. According to the invention, the formula and the preparation process of the renewable concrete are adjusted, so the strength of the prepared concrete can reach C60 or above, the problem of cracking is avoided, and problems in recycling of waste concrete are well solved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a renewable concrete formula and a preparation method thereof. Background technique [0002] With the development of society, there are more and more buildings and construction projects of all kinds. However, with the transformation of the city, a large number of abandoned buildings in the city are caused. But also spend a lot of manpower and material resources. With the development of construction science, effective utilization of construction waste has become a new topic. [0003] In the prior art, the construction waste formed from abandoned building concrete is crushed to form recycled concrete for recycling, which not only processes a large amount of construction waste, but also saves construction materials. However, when waste concrete is used as the aggregate of recycled concrete, the interfacial pores are more than those of natural aggregate, and the water absorption r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/32B28C5/08B28C5/00C04B18/16C04B20/00C04B18/08C04B16/06C04B14/48C04B18/10C04B22/08C04B22/14C04B111/34
CPCB28C5/003B28C5/08C04B18/16C04B28/04C04B40/0039C04B2111/343C04B2201/50C04B18/08C04B14/068C04B2103/302C04B12/04C04B24/023C04B24/24C04B24/32C04B20/0076C04B16/0683C04B14/48C04B18/101C04B22/141Y02W30/91
Inventor 李国宏贾翠英刘超李培叶婷罗军张德新陈远龙
Owner 江苏鹿晶新材料科技有限公司
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