C25 full-recycled-aggregate concrete and preparation method thereof

A technology of recycled aggregate and recycled coarse aggregate, applied in the field of building materials, can solve the problems of low compressive strength and anti-chloride ion penetration performance of recycled concrete, and achieve the effect of prolonging the time.

Inactive Publication Date: 2016-07-27
叶腾
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many studies that simultaneously consider the compressive strength and chloride ion penetration resistance of recycled concrete from the perspective of practicability.

Method used

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  • C25 full-recycled-aggregate concrete and preparation method thereof
  • C25 full-recycled-aggregate concrete and preparation method thereof
  • C25 full-recycled-aggregate concrete and preparation method thereof

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Embodiment Construction

[0020] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail through the following examples, but the present invention is not limited thereto.

[0021] A kind of C25 fully recycled aggregate concrete, the raw material composition of described concrete comprises cement, fly ash, sand, recycled coarse aggregate and water, when utilizing recycled coarse aggregate to replace natural stone completely, the mixing ratio of each raw material is: The water-binder ratio is 0.505~0.52, the fly ash content is 10%~15%, and the sand rate is 37%~39%.

[0022] A better set of mix weight ratio is cement: fly ash: sand: recycled coarse aggregate: water = 380.77: 42.31: 596.29: 975.81: 243.74, mix ratio parameters: water cement ratio is 0.52, sand rate is 38%, powder The mixing amount of coal ash is 10%, and the replacement rate of recycled coarse aggregate is 100%.

[0023] The regenerated coarse aggregate is crushed and...

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Abstract

The invention discloses C25 full-recycled-aggregate concrete and a preparation method thereof. The concrete comprises the following raw material component: cement, coal ash, sand, recycled coarse aggregates, and water; after recycled coarse aggregates totally replace natural cobblestones, mixing amount ratio of each raw material is as follows: water-binder ratio is 0.505-0.52, mixing amount ratio of coal ash is 10-15%, and sand ratio is 37-39%. A secondary stirring method is improved, first stirring time is properly prolonged, corner angles and wrapped old mortar existed in a fragmentation process of recycled coarse aggregates are effectively reduced, so that workability of the recycled concrete is satisfied without adding additives, substitution rate of the recycled coarse aggregates and mixing amount of the coal ash are changed, and the configured C25 full-recycled-aggregate concrete can satisfy compressive strength and requirements of an invasive index of chloride ion whose function grade is D grade for 50 years of design working life.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a C25 fully recycled aggregate concrete and a preparation method thereof. Background technique [0002] Recycled aggregate concrete is currently the main direction of research and promotion of construction waste resource utilization technology. Scholars at home and abroad have conducted a lot of research on the mechanical properties of recycled concrete and achieved certain results. In recent years, with the continuous research on the mechanical properties of recycled concrete and the needs of engineering practice, the durability of recycled concrete has become a hot spot of concern. The chloride ion permeability is an important part of the durability of recycled concrete. In terms of the chloride ion penetration resistance of recycled concrete, researchers have also conducted a lot of research and achieved certain results. However, there are not many studies that simultaneous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08
CPCY02W30/91
Inventor 叶腾俆毅慧张锦
Owner 叶腾
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