Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes

The present study was conducted to compare the effect of natural zeolite (Z) and silica fume (SF) pozzolans on the mechanical properties of recycled aggregates concrete (RAC’s). The RCA’s made with using different levels of recycled coarse aggregates instead of natural coarse aggregates. To improve...

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Autores principales:	Fathollah Sajedi, Hasan Jalilifar
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	recycled aggregates concrete (rac) mechanical properties silica fume (sf) natural zeolite (z) pozzolan Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/9244505f108f4c2f8be2c7b5122eb32b
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spelling	oai:doaj.org-article:9244505f108f4c2f8be2c7b5122eb32b2021-11-08T15:51:06ZStudy and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes2476-39772538-261610.22065/jsce.2017.88276.1224https://doaj.org/article/9244505f108f4c2f8be2c7b5122eb32b2019-02-01T00:00:00Zhttps://www.jsce.ir/article_51819_33c8f7b252a7cc9d2c839bf5252e0df0.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The present study was conducted to compare the effect of natural zeolite (Z) and silica fume (SF) pozzolans on the mechanical properties of recycled aggregates concrete (RAC’s). The RCA’s made with using different levels of recycled coarse aggregates instead of natural coarse aggregates. To improve quality of RCA’s, the introduced pozzolans were replaced with different levels of ordinary Portland cement (OPC). To determine and compare the mechanical properties of concretes, 24 mix designs were made and different tests done as compressive strength at the ages 7, 28 and 91 days, and the tests as splite cylinder tests (SPT), modulus of elasticity and ultra-pulse velocity (UPV) at the age of 28- day. The obtained results generally showed that in duration of 28 days, the usage of silica fume could results in about 40 MPa compressive strength for RCA’s with 100% of recycled coarse aggregates; meanwhile using natural zeolite was not able to give target strength of design. Using 10% of silica fume instead of OPC in RCA’s specially RCA’s having 25% of recycled aggregates caused in the mechanical properties of RCA’s be rarely like those natural aggregate concretes. Although, using 10% of zeolite in concrete could improve some mechanical properties, but the concretes containing silica fume gave superior mechanical properties than those of zeolite.Fathollah SajediHasan JalilifarIranian Society of Structrual Engineering (ISSE)articlerecycled aggregates concrete (rac)mechanical propertiessilica fume (sf)natural zeolite (z)pozzolanBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss شماره ویژه 4, Pp 109-126 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	recycled aggregates concrete (rac) mechanical properties silica fume (sf) natural zeolite (z) pozzolan Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	recycled aggregates concrete (rac) mechanical properties silica fume (sf) natural zeolite (z) pozzolan Bridge engineering TG1-470 Building construction TH1-9745 Fathollah Sajedi Hasan Jalilifar Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
description	The present study was conducted to compare the effect of natural zeolite (Z) and silica fume (SF) pozzolans on the mechanical properties of recycled aggregates concrete (RAC’s). The RCA’s made with using different levels of recycled coarse aggregates instead of natural coarse aggregates. To improve quality of RCA’s, the introduced pozzolans were replaced with different levels of ordinary Portland cement (OPC). To determine and compare the mechanical properties of concretes, 24 mix designs were made and different tests done as compressive strength at the ages 7, 28 and 91 days, and the tests as splite cylinder tests (SPT), modulus of elasticity and ultra-pulse velocity (UPV) at the age of 28- day. The obtained results generally showed that in duration of 28 days, the usage of silica fume could results in about 40 MPa compressive strength for RCA’s with 100% of recycled coarse aggregates; meanwhile using natural zeolite was not able to give target strength of design. Using 10% of silica fume instead of OPC in RCA’s specially RCA’s having 25% of recycled aggregates caused in the mechanical properties of RCA’s be rarely like those natural aggregate concretes. Although, using 10% of zeolite in concrete could improve some mechanical properties, but the concretes containing silica fume gave superior mechanical properties than those of zeolite.
format	article
author	Fathollah Sajedi Hasan Jalilifar
author_facet	Fathollah Sajedi Hasan Jalilifar
author_sort	Fathollah Sajedi
title	Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
title_short	Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
title_full	Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
title_fullStr	Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
title_full_unstemmed	Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
title_sort	study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/9244505f108f4c2f8be2c7b5122eb32b
work_keys_str_mv	AT fathollahsajedi studyandcomparisonoftheeffectofnaturalzeoliteandsilicafumeonmechanicalpropertiesofrecycledaggregatesconcretes AT hasanjalilifar studyandcomparisonoftheeffectofnaturalzeoliteandsilicafumeonmechanicalpropertiesofrecycledaggregatesconcretes
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Study and comparison of the effect of natural zeolite and silica fume on mechanical properties of recycled aggregates concretes

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