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Recycled green concrete with low cement content and preparation method thereof

A concrete and green technology, applied in the field of building materials, can solve the problems of high cost, high cement consumption, and the inability to implement technical and economic policies for resource conservation and environmental protection, and achieve resource consumption, effective utilization, and high density. Effect

Active Publication Date: 2014-02-05
北京联绿技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional concrete uses natural coarse and fine aggregate (natural sandstone) materials, and the amount of cement is relatively high, which not only costs a lot, but also fails to implement the national technical and economic policies of saving resources and protecting the environment.

Method used

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  • Recycled green concrete with low cement content and preparation method thereof
  • Recycled green concrete with low cement content and preparation method thereof
  • Recycled green concrete with low cement content and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare recycled green concrete with strength class C20. The cementitious material contains 15% of cement, 60% of recycled micropowder, 10% of slag powder, and 15% of limestone powder. The particle size ratio of 5mm~10mm and 10mm~16mm is 6:4; the specific surface area is 350m 2 / kg, 550m 2 / kg, 750m 2 / kg of regenerated micropowder according to the ratio of 1:5:4, according to the mix ratio in Table 1, the sand rate is 47%, the water-cement ratio is 0.6, weigh cement, regenerated sand, regenerated stone, slag powder, regenerated micropowder, limestone powder, Put in regenerated sand, regenerated stone and 2∕5 of water and stir for 10 seconds; put in cement, regenerated micropowder, slag powder, limestone powder, admixture and the remaining 3∕5 of water and continue stirring until the machine is evenly discharged. The mixing time from the regenerated sand and regenerated stone into the mixer to the concrete output is 100-120 seconds.

[0028] Table 1 Mixing ratio of ...

Embodiment 2

[0035] Prepare recycled green concrete with strength class C30. The cementitious material contains 20% of cement, 40% of recycled micropowder, 20% of slag powder, and 20% of limestone powder. The ratio of fine sand with a particle size of 0mm to 3mm and a particle size of 3mm to 5mm in the recycled sand is 7:3; recycled stone The particle size ratio of 5mm~10mm and 10mm~16mm is 6:4; the specific surface area is 350m 2 / kg, 550m 2 / kg, 750m 2 / kg of regenerated micropowder according to the ratio of 1:5:4, according to the mix ratio in Table 3, the sand ratio is 47%, the water-cement ratio is 0.47, weigh cement, regenerated sand, regenerated stone, slag powder, regenerated micropowder, limestone powder, Put in regenerated sand, regenerated stone and 2∕5 of water and stir for 10 seconds; put in cement, regenerated micropowder, slag powder, limestone powder, admixture and the remaining 3∕5 of water and continue stirring until the machine is evenly discharged. The mixing time fr...

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Abstract

The invention relates to recycled green concrete with low cement content. The recycled green concrete is the concrete prepared through reclaimed sand and recycled stone instead of natural sand and stone, and recycled micro powder, slag and limestone powder instead of most of the cement, wherein the reclaimed sand and recycled stone are obtained by treating construction wastes taking waste concrete as major by cleaning, crushing, grading and mixing in a certain proportion.

Description

technical field [0001] The invention belongs to the field of building materials and relates to concrete materials, in particular to a concrete material mixed with a large amount of construction waste and industrial waste. Background technique [0002] Concrete is an indispensable and important engineering material in modern civil engineering. It has high compressive strength and durability, and different physical and mechanical properties can be obtained by matching different materials in a certain proportion, and it has plasticity. However, traditional concrete uses natural coarse and fine aggregate (natural sandstone) materials, and the amount of cement is relatively high, which not only costs a lot, but also fails to implement the national technical and economic policies of saving resources and protecting the environment. Contents of the invention [0003] The invention relates to a kind of recycled green concrete with low cement consumption, which is to replace the na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16C04B28/08
CPCY02W30/91
Inventor 王卫萍李建勇尚百雨马雪英程东惠
Owner 北京联绿技术集团有限公司
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