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      EFFECT OF DIFFERENT TYPES OF FIBER UTILIZATION ON MECHANICAL PROPERTIES OF RECYCLED AGGREGATE CONCRETE CONTAINING SILICA FUME

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          Abstract

          The use of recycled aggregate (RA) instead of natural aggregate (NA) in concrete is necessary for environmental protection and the effective utilization of resources. The addition of recycled aggregates in concrete increases shrinkage, porosity and decreases the mechanical properties compared to that of normal concrete. This study was aimed at investigating how the addition of various proportions of polypropylene and steel fiber affect the mechanical properties of recycled aggregate concrete (RAC). The natural coarse aggregates (NCAs) used in the production of normal concrete (NC) were replaced in 30% and 50% proportions by recycled coarse aggregates (RCAs) obtained from the demolished buildings. In this case, a polypropylene fiber (PF) content of 0.1% and steel fiber (SF) 1% and 2% volume fractions were used, along with hybrid fibers-a combination of the two. While the material performance of RAC compared to NC is analyzed by reviewing existing published literature, it is not evident what the use of RCAs and hybrid fibers have on the mechanical properties of concrete. The results showed that the compressive strength, flexural strength and impcat resistance of RAC were reduced as the percentage of RCAs increased. It was observed that the compressive strength was increased with the addition of 1% steel fiber in the RAC. The flexural and impact performance of steel fiber-reinforced concrete (Specimens NC and RAC) was increased as the volume fractions of steel fiber increased. The hybrid fiber reinforced concretes showed the best results in their mechanical performance of all the concrete groups.

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          Most cited references 65

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          Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete

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            Mechanical behaviour of concrete made with fine recycled concrete aggregates

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              Mechanical properties of recycled aggregate concrete under uniaxial loading

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1552-6100
                1943-4618
                1943-4618
                Winter 2020
                : 15
                : 1
                : 119-136
                Author notes

                1. Department of Civil Engineering, Ataturk University, Erzurum, Turkey

                *(corresponding author: mroltulu@ 123456atauni.edu.tr )
                Article
                jgb.15.1.119
                10.3992/1943-4618.15.1.119
                ©2020 by College Publishing. All rights reserved.
                Page count
                Pages: 18
                Product
                Categories
                RESEARCH ARTICLES

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