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Pumpable regeneration block body concrete and preparation method thereof

A technology of concrete and waste concrete, applied in solid waste management, climate sustainability, sustainable waste treatment, etc., can solve problems such as improper disposal of construction waste, waste of resources, environmental pollution, etc., achieve excellent product performance, reduce water Effect of heating and reducing mining

Inactive Publication Date: 2019-04-23
SHENZHEN GENERAL INST OF ARCHITECTURAL DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pumpable recycled block concrete and its preparation method to solve a series of problems such as waste of resources and environmental pollution caused by improper disposal of existing construction waste

Method used

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  • Pumpable regeneration block body concrete and preparation method thereof
  • Pumpable regeneration block body concrete and preparation method thereof
  • Pumpable regeneration block body concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a C30 pumpable regenerative block concrete, in parts by mass, the pumpable regenerative block concrete includes the following components:

[0034]

[0035]

[0036] Among them, the mass replacement rate of waste concrete blocks to concrete is about 15%, the size of waste concrete blocks is 40-60 mm, the particle size of recycled coarse aggregate and natural crushed stone is 5-20 mm, and the particle size of recycled fine aggregate The diameter is 0.15 ~ 0.475mm, and the water reducing rate of polycarboxylate water reducing agent is greater than 25%.

[0037] In order to ensure that the C30 pumpable recycled block concrete in this embodiment can be successfully pumped through the concrete pump, this embodiment further limits the size of the waste concrete block to three times less than or equal to the diameter of the concrete delivery pipe. Specifically, in this embodiment, the diameter of the concrete delivery pipe used to transport the pu...

Embodiment 2

[0039] This embodiment provides a C30 pumpable regenerative block concrete, in parts by mass, the pumpable regenerative block concrete includes the following components:

[0040]

[0041] Among them, the mass replacement rate of waste concrete blocks to concrete is about 11%, the size of waste concrete blocks is 40-60 mm, the particle size of recycled coarse aggregate and natural crushed stone is 5-20 mm, and the particle size of recycled fine aggregate The diameter is 0.15 ~ 0.475mm, and the water reducing rate of polycarboxylate water reducing agent is greater than 25%.

Embodiment 3

[0043] This embodiment provides a C30 pumpable regenerative block concrete, in parts by mass, the pumpable regenerative block concrete includes the following components:

[0044]

[0045] Among them, the mass replacement rate of waste concrete blocks to concrete is about 19%, the size of waste concrete blocks is 40-60 mm, the particle size of recycled coarse aggregate and natural crushed stone is 5-20 mm, and the particle size of recycled fine aggregate The diameter is 0.15 ~ 0.475mm, and the water reducing rate of polycarboxylate water reducing agent is greater than 25%.

[0046] The present invention also provides a method for preparing the pumpable recycled block concrete described in any one of the first to third embodiments, including the following steps:

[0047] Select waste concrete: before the building is demolished, the strength of the waste concrete is detected by the rebound test method or the core-pulling detection method; the design strength of the building is f...

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Abstract

The invention relates to the field of construction waste resource utilization, in particular to pumpable regeneration block body concrete and a preparation method thereof. The pumpable regeneration block body concrete comprises the following ingredients: a waste concrete block body, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, an efficient water reducing agent, cement, coal ash and water. The pumpable regeneration block body concrete has the advantages of environmental protection and full recycle and utilization of construction waste, and further has excellent product performance simultaneously, so that the product has higher value.

Description

technical field [0001] The invention relates to the field of resource utilization of construction waste, in particular to a pumpable recycled block concrete and a preparation method thereof. Background technique [0002] The acceleration of urbanization has posed a huge challenge to the construction industry. On the one hand, due to the construction needs of a large number of new construction, reconstruction and expansion projects, builders need to intensify the excavation of natural resources such as mountains and river beds to obtain more building materials such as stones and river sand, which not only seriously consumes natural resources resources, and severely damaged the natural environment. On the other hand, the restoration and demolition of various projects will generate a large amount of construction waste, and the current treatment methods for construction waste are still open-air stacking or landfill, which will bring soil and water pollution and aggravate the im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCC04B28/00C04B2111/00146C04B14/02C04B18/08C04B18/16C04B2103/302C04B14/068Y02W30/91
Inventor 刘琼祥孙煜坤刘伟
Owner SHENZHEN GENERAL INST OF ARCHITECTURAL DESIGN & RES