Building solid waste recycled concrete admixture

A technology for recycling concrete and admixtures, which is applied in solid waste management, sustainable waste treatment, climate sustainability, etc. The effect of concrete densification and improvement of carbonation resistance

Pending Publication Date: 2021-04-30
郑加专
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current research on building demolition mainly focuses on recycled aggregates and recycled concrete, and fails to recycle all components of construction waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Example: crushing pretreatment of construction solid waste; sorting: magnetic sorting and sundry sorting; magnetic sorting to screen out scrap iron; sundry sorting to screen out waste wood; crushing with jaw crusher; washing and screening : Rinse and screen after sieving metal steel bars and machine-made sand: Regenerated fine powder <Φ0.15mm, recycled aggregate Φ4.75mm~20mm for C25~C30 concrete, high-quality recycled sand powder Φ0.15~4.75mm for Ordinary mortar or special mortar; recycled fine aggregate or sand powder ultra-fine grinding to generate recycled rubber, recycled cement and recycled powder; chemical strengthening and physical strengthening of admixtures, chemical strengthening with a concentration of 6% organic silicon solution Spraying, impregnation and drying were carried out on the recycled aggregate, and after one impregnation with organosilane; the physical strengthening was added with polypropylene fiber at a dosage of 1.2kg / m3 during the preparation p...

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PUM

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Abstract

The invention relates to the technical field of building solid waste recycled concrete, in particular to a building solid waste recycled concrete admixture, which comprises the following steps of S1, building solid waste crushing pretreatment, S2, sorting: magnetic sorting and sundry sorting, S3, crushing, S4, flushing and screening: screening the metal reinforcing steel bars, the recycled micro powder, the recycled aggregate and the high-quality recycled sand powder, S5, ultrafine grinding of the recycled fine aggregate or sand powder, and S6, chemical strengthening and physical strengthening of the admixture. The concrete fragments are subjected to building solid waste crushing pretreatment, sorting, crushing, washing and screening, recycled fine aggregate or sand powder superfine grinding and chemical strengthening and physical strengthening of the admixture, the high-quality recycled aggregate with good grading and low impurity content can be obtained through the production mode, and by adjusting a screen, products with different particle sizes and different gradations can be obtained so as to meet various requirements.

Description

technical field [0001] The invention relates to the technical field of construction solid waste regenerated concrete, in particular to a construction solid waste regenerated concrete admixture. Background technique [0002] my country's urban construction continues to accelerate and expand, urban transformation and the rapid development of the construction industry, accompanied by a large number of construction demolition waste "besieged" towns. It is estimated that for every 10,000 square meters of old buildings demolished, 70,000 to 13,000 tons of construction demolition waste will be produced. Without any treatment, a large amount of construction waste is directly transported to the suburbs of cities and towns for open-air stacking, occupying land, and continuously polluting soil, water sources, rivers, and vegetation. The comprehensive recycling of construction waste plays an important role in solving the siege and environmental pollution problems facing cities and towns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16C04B24/42C04B28/02C04B111/20
CPCC04B18/16C04B28/02C04B40/0039C04B2111/20C04B2111/2015C04B24/42C04B16/0633C04B14/02C04B14/06Y02W30/91
Inventor 郑加专
Owner 郑加专
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