Method for preparing multielement assorted-fibred reinforced recycled concrete with low elasticity modulus
A technology of recycled concrete and hybrid fibers, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of land occupation, resource environment, pollution, etc., and achieve simple production methods, improved performance, environmental protection, economy and The effect of social benefits
Inactive Publication Date: 2013-05-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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[0004] With the development of the automobile industry, a large number of waste tires are continuously produced. The primitive and simple open-air stacking, incineration and destruction methods not only occupy a large amount of land resources but also cause great environmental pollution.
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[0033] 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 Figure 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.
[0034] Cumulative curve of particle size distribution Figure 6 Determine the relevant particle size d of the particles 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 the c...
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Abstract
The invention discloses a method for preparing multielement assorted-fibred reinforced recycled concrete with low elasticity modulus. Cracked waste concrete is adopted as partially recycled coarse aggregate of the concrete; nylon fiber extracted from waste tyres, modified polypropylene coarse TANK fiber and polypropylene three-branched anti-aging reticular fiber are added to improve the mechanical property of the recycled concrete; in terms of 100 parts by weight, the concrete comprises 21 parts of 32.5R common portland cement, 20 parts of fine aggregate, 25-35 parts of natural macadam, 15-25parts of recycled coarse aggregate, 0.01-0.02 part of nylon fiber, 0.01-0.02 part of modified polypropylene coarse TANK fiber, 0.01-0.02 part of polypropylene three-branched anti-aging reticular fiber and 9 parts of water per cubic meter. The method is simple in preparation, solves the environmental problems caused by construction waste and black pollution and has wide economic and promotion values and social 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 preparation method of multivariate low elastic modulus hybrid fiber reinforced recycled concrete, which uses broken waste concrete as part of the recycled coarse aggregate of concrete , and adding nylon fibers extracted from waste tires, adding polypropylene three-branch anti-aging mesh fibers and modified polypropylene TANK fibers, and preparing multi-component hybrid fiber-reinforced recycled concrete through reasonable mix ratio design. Background technique [0002] With the rapid development of my country's economic construction and the acceleration of urbanization, the construction waste caused by the transformation of urban villages not only causes serious pollution to the environment, but also consumes a large amount of sand and stones, making natural resources gradua...
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IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 王社良张博朱军强丁怡洁赵祥樊禹江
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY