Preparation of recycled concrete through compound enhancement of low-elasticity-modulus modified coarse fibre and active mineral material

A technology of recycled concrete and concrete, applied in the field of green building materials, can solve the problems of the discreteness of concrete restricting the development of recycled concrete, and achieve the effect of improving the interface transition zone
CN102584136BInactive Publication Date: 2013-05-15XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Publication Date
2013-05-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method for preparing recycled concrete through compound enhancement of low-elasticity-modulus modified coarse fibre and active mineral material. Cracked waste concrete is adopted as partially recycled coarse aggregate the concrete; modified polypropylene TANK fiber, coal ash, silicon powder and a high-efficient water reducing agent are added to improve the mechanical property of the recycled concrete; in terms of 100 parts by weight, the concrete comprises 14 parts of 32.5R common portland cement, 20 parts of fine aggregate (medium-coarse sand), 36 parts of natural macadam (5-31.5mm), 15 parts of recycled aggregate (5-20mm), 4-5 parts of second-level coal ash, 1-2 parts of silicon powder, 0.3 part of high-efficient water reducing agent, 9 parts of water and 0.01-0.04 part of modified polypropylene TANK fiber per cubic meter. The method is simple in preparation and reliable in performance, provides a new method for effectively utilizing and promoting the recycled concrete, increases utilization rate of the waste concrete and has economy and social value.
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Description

technical field

[0001] The invention belongs to the field of new environment-friendly green building materials, and relates to recycled concrete prepared from waste concrete, in particular to a preparation method of composite reinforced recycled concrete with low elastic modulus modified polypropylene coarse TANK fiber active cementitious material. Background technique

[0002] The massive consumption and irrational use of natural resources have resulted in an increasing shortage of natural resources. Waste concrete is used as waste from building construction and demolition of old buildings. If it is discarded, it will not only bring about complex environmental problems, but also cause A huge waste of resources. Therefore, in order to meet the requirements of the circular economy strategy and realize the sustainable development of the concrete industry, the research and application of recycled concrete is imperative. However, in the preparation of recycled concrete, the coa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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