Pumpable high-strength recycled concrete and preparation technology thereof

A technology of recycling and preparation process, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. Stable performance

Inactive Publication Date: 2016-10-12
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a pumpable high-strength recycled recycled concrete and its preparation process. The waste concrete is used to process coarse and fine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A pumpable high-strength recycled recycled concrete, including recycled coarse aggregate with a particle size of 5-20mm, recycled fine aggregate with a particle size of 0.15-0.475mm, crushed stone and P.O.42.5R cement added according to the mix ratio , secondary fly ash, silica fume, superplasticizer and water.

[0027] The pumpable high-strength recycled concrete is recycled concrete with a strength grade of C40, which includes 750 parts by mass of recycled coarse aggregate, 350 parts of crushed stone, 600 parts of recycled fine aggregate, and 8 parts of high-efficiency water reducer , 300 parts of cement, 110 parts of fly ash, and 170 parts of water.

Embodiment 2

[0029] The pumpable high-strength recycled recycled concrete is recycled concrete with a strength grade of C40, which includes 850 parts by mass of recycled coarse aggregate, 450 parts of crushed stone, 650 parts of recycled fine aggregate, and 10 parts of high-efficiency water reducer , 350 parts of cement, 130 parts of fly ash, and 180 parts of water.

Embodiment 3

[0031] A pumpable high-strength recycled recycled concrete, including recycled coarse aggregate with a particle size of 5-20mm, recycled fine aggregate with a particle size of 0.15-0.475mm, crushed stone and P.O.42.5R cement added according to the mix ratio , secondary fly ash, silica fume, superplasticizer and water.

[0032] The pumpable high-strength recycled concrete is recycled concrete with a strength grade of C60, which includes 700 parts of recycled coarse aggregate, 500 parts of crushed stone, 650 parts of recycled fine aggregate, polycarboxylic acid high-performance 13 parts of water agent, 400 parts of cement, 130 parts of fly ash, 40 parts of silica fume, and 150 parts of water.

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Abstract

The invention discloses pumpable high-strength recycled concrete and a preparation technology thereof. Waste concrete is utilized to make recycled coarse and fine aggregates. In the crushing process of the waste concrete, the recycled coarse aggregates and the recycled fine aggregates are produced, and good grading is formed. A proper amount of natural stones, cement, pulverized fuel ash, silicon powder, a high-efficiency water reducing agent and water are added according to the proportion, and C40-C60 graded high-strength recycled concrete can be obtained after mixing. The waste concrete in construction waste is fully utilized, and waste concrete recycling is achieved on the premise that the strength and performance are not affected.

Description

technical field [0001] The invention relates to the field of resource utilization of construction waste, in particular to a pumpable high-strength recycled concrete and a preparation process thereof. Background technique [0002] Concrete has a long history as a building material and is widely used in the field of modern civil engineering. The raw materials of ordinary concrete are mainly cement, coarse aggregate (stone), fine aggregate (sand), and water. Among them, river sand is a scarce natural resource. With the further development of urbanization, river sand will become more and more Sea sand instead of river sand will cause corrosion of steel bars in concrete, and the strength of artificial sand is difficult to meet the requirements. The cement production process will bring huge resource, energy and environmental burdens. The country has listed the cement industry as a high energy consumption industry. [0003] On the other hand, in the process of building constructi...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16C04B18/14C04B18/08
CPCC04B18/08C04B18/146C04B18/167C04B28/04C04B14/02C04B2103/302C04B24/24Y02W30/91
Inventor 焦楚杰钱红岗王龙苏建华
Owner GUANGZHOU UNIVERSITY
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