Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite

Abstract Although the mechanical properties of recycled aggregates concrete (RAC’s) are well known, the durability properties of these concretes are less agreed upon by researchers. The main objective of this paper is to evaluate the durability of RAC’s made of recycled concrete...

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Autores principales:	Jalilifar,Hasan, Sajedi,Fathollah, Toosi,Vahid Razavi
Lenguaje:	English
Publicado:	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2020
Materias:	recycled concrete recycled aggregate durability silica-fume (SF) natural zeolite (NZ)
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300457
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spelling	oai:scielo:S0718-915X20200003004572021-02-16Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeoliteJalilifar,HasanSajedi,FathollahToosi,Vahid Razavi recycled concrete recycled aggregate durability silica-fume (SF) natural zeolite (NZ) Abstract Although the mechanical properties of recycled aggregates concrete (RAC’s) are well known, the durability properties of these concretes are less agreed upon by researchers. The main objective of this paper is to evaluate the durability of RAC’s made of recycled concrete coarse aggregate (RCCA) containing silica-fume (SF) and natural zeolite (NZ). Four series of mixtures were made using four levels of RCCA as 0%, 25%, 50%, and 100% with natural coarse aggregates (NCA’s). SF with 5%, 10%, and 15% and NZ with 10%, 20%, and 30% were replaced with cement. To evaluate the durability properties of RAC’s, 28 mixed design were made and compressive strength (CS), water absorption by immersion (WAI), water absorption by capillary (WAC), electrical resistance (ER), electrical conductivity (EC), and rapid chloride ion penetration test (RCPT) were measured. The results showed that WAI and WAC of RAC increased with enhancing the RCCA level. By increasing the replacement level of RCCA, and usage of 10% SF replacement showed a greater impact on improving CS. Concretes containing NZ had higher WAI than that of SF. The increasing level of NZ by more than 10%, increases the space of cavities between silicate gels and therefore increases WAC in concretes. With increasing in the RCA level, so did the EC of RAC; however, EC in pozzolanic concretes showed a lower growth rate by increasing the RCCA level. Using 25% of RCCA, and 10% of SF, it was possible to make concrete with very low chloride ion penetration.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.19 n.3 20202020-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300457en10.7764/rdlc.19.3.457
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	recycled concrete recycled aggregate durability silica-fume (SF) natural zeolite (NZ)
spellingShingle	recycled concrete recycled aggregate durability silica-fume (SF) natural zeolite (NZ) Jalilifar,Hasan Sajedi,Fathollah Toosi,Vahid Razavi Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
description	Abstract Although the mechanical properties of recycled aggregates concrete (RAC’s) are well known, the durability properties of these concretes are less agreed upon by researchers. The main objective of this paper is to evaluate the durability of RAC’s made of recycled concrete coarse aggregate (RCCA) containing silica-fume (SF) and natural zeolite (NZ). Four series of mixtures were made using four levels of RCCA as 0%, 25%, 50%, and 100% with natural coarse aggregates (NCA’s). SF with 5%, 10%, and 15% and NZ with 10%, 20%, and 30% were replaced with cement. To evaluate the durability properties of RAC’s, 28 mixed design were made and compressive strength (CS), water absorption by immersion (WAI), water absorption by capillary (WAC), electrical resistance (ER), electrical conductivity (EC), and rapid chloride ion penetration test (RCPT) were measured. The results showed that WAI and WAC of RAC increased with enhancing the RCCA level. By increasing the replacement level of RCCA, and usage of 10% SF replacement showed a greater impact on improving CS. Concretes containing NZ had higher WAI than that of SF. The increasing level of NZ by more than 10%, increases the space of cavities between silicate gels and therefore increases WAC in concretes. With increasing in the RCA level, so did the EC of RAC; however, EC in pozzolanic concretes showed a lower growth rate by increasing the RCCA level. Using 25% of RCCA, and 10% of SF, it was possible to make concrete with very low chloride ion penetration.
author	Jalilifar,Hasan Sajedi,Fathollah Toosi,Vahid Razavi
author_facet	Jalilifar,Hasan Sajedi,Fathollah Toosi,Vahid Razavi
author_sort	Jalilifar,Hasan
title	Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
title_short	Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
title_full	Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
title_fullStr	Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
title_full_unstemmed	Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
title_sort	evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite
publisher	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000300457
work_keys_str_mv	AT jalilifarhasan evaluatingthedurabilityofrecycledconcretemadeofcoarserecycledaggregateconcretecontainingsilicafumeandnaturalzeolite AT sajedifathollah evaluatingthedurabilityofrecycledconcretemadeofcoarserecycledaggregateconcretecontainingsilicafumeandnaturalzeolite AT toosivahidrazavi evaluatingthedurabilityofrecycledconcretemadeofcoarserecycledaggregateconcretecontainingsilicafumeandnaturalzeolite
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Evaluating the durability of recycled concrete made of coarse recycled aggregate concrete containing silica-fume and natural zeolite

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