Preparation method for multielement mixed regenerated fiber enhanced regenerated concrete

A technology of recycled concrete and recycled fiber, which can be applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of environmental pollution, occupation of land resources, etc., achieve wide application and promotion space, simple production method, improved performance effect

Inactive Publication Date: 2012-07-18
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0003] With the development of the automobile industry, a large number of waste tires will be produced every year, and the original simple open-air stacking, incineration and destruction methods not only occupy a large amount of land resources, but also cause great environmental pollution

Method used

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  • Preparation method for multielement mixed regenerated fiber enhanced regenerated concrete
  • Preparation method for multielement mixed regenerated fiber enhanced regenerated concrete
  • Preparation method for multielement mixed regenerated fiber enhanced regenerated concrete

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Embodiment

[0034] 1. Carry out mechanical crushing, screening, cleaning, etc. on waste concrete, and the particle gradation of the prepared coarse aggregate should meet the table in Article 3.2.1 of "Standards for the Quality and Testing Methods of Sand and Stone for Ordinary Concrete" (JGJ52-2006). 3.2.1-2 (grain grading range of crushed stone or pebble) Requirements for aggregate. Depend on Image 6 It can be seen that natural coarse aggregate NA, recycled coarse aggregate RA-I, RA-II, and RA-III all meet the requirements of JGJ52-2006 for continuous gradation of coarse aggregate.

[0035] From the cumulative particle gradation curve ( Image 6 ) to determine the relevant particle size d of the particle 10 、d 30 and d 60 , and obtain the unevenness coefficient Ku=d 60 / d 10 and coefficient of curvature where d 10 is the corresponding particle size when the mass percentage of particles smaller than a certain particle size is 10%; d 30 is the corresponding particle size when th...

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Abstract

The invention discloses a preparation method for multielement mixed regenerated fiber enhanced regenerated concrete. According to the method, crushed waste concrete is used as partial generated coarse aggregate of the regenerated concrete, nylon fibers and radial line steel fibers extracted from waste tires are added, and low elasticity modulus polypropylene reticular fibers are also added to improve the mechanical property of the generated concrete. In per cubic meter of concrete, metered by 100 weight parts, the concrete comprises the following substances of 21 parts of 32.5R ordinary portland cement, 20 parts of fine aggregate, 25-35 parts of natural macadam, 15-25 parts of generated coarse aggregate, 0.01-0.02 part of nylon fiber, 0.01-0.02 part of radial line steel fiber, 0.01-0.02 part of polypropylene three-principal anti-aging reticular fiber and 9 parts of water. The preparation method is simple in preparation, can generally meet the requirements of conventional concrete of medium and low grades, can improve the performance of the generated concrete, particularly the fracture resistant performance, and has considerable economic benefit and environmental benefit.

Description

technical field [0001] The invention belongs to the field of new environment-friendly green building materials, and relates to the preparation of composite reinforced recycled concrete, in particular to a method for preparing recycled concrete reinforced with multiple mixed recycled fibers. The method uses broken waste concrete as part of the recycled coarse aggregate of concrete, and Adding two kinds of recycled fibers extracted from waste tires and adding low elastic modulus polypropylene mesh fibers, a new type of hybrid recycled fiber-reinforced recycled concrete was prepared through reasonable mix ratio design to improve the mechanical properties of recycled concrete. 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 env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 王社良张博赵祥杜园芳樊禹江杨涛
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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