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http://hdl.handle.net/20.500.12358/23432
TitleValorization of Recycled Aggregate in Concrete and Mortar
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Abstract

In this study, the influences of partial replacements of sand by fine recycled aggregate (RA), and replacement of cement by very fine RA, on the mechanical behaviour and the microstructure changes of mortar were investigated. An experimental program was carried out for producing mortar incorporated with large volumes of RA of various particle sizes. Using the two-step method, five mixtures were made for each part of study (part 1: only aggregate less than 630µm, and part 2: 360µm were replaced by natural aggregate NA), starting by a mix with 100 % of RA, and then 75%, 50%, 25% and 0%. Prism samples were molded in (4*4*16 cm) for mechanical testing (flexure and compression). The results obtained showed that it is possible to use the fine RA to give mixes with compressive strength and flexure strength close to the control mix. Moreover, the use of super-plasticizer leads to a significant increase for both strengths. In the case of the replacement of cement with the very fine RA and in order to obtain green cement, both compressive and flexure strengths are closer to the control mix, which is consistent with microstructure investigations.

Authors
Elaqra, Hossam A.
TypeJournal Article
Date2015
LanguageEnglish
Subjects
fine recycled aggregate
very fine recycled aggregate
recycled aggregate
mechanical behavior
interfacial transition zone
super-plasticizer
Published inIUG Journal for Natural and Engineering Studies
SeriesVolume: 23, Number: 1
Publisherالجامعة الإسلامية - غزة
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  • Staff Publications- Faculty of Engineering [908]
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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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The institutional repository of the Islamic University of Gaza was established as part of the ROMOR project that has been co-funded with support from the European Commission under the ERASMUS + European programme. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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