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82604

REUTILIZATION OF RECYCLED CONCRETE AS CONCRETE COARSE AGGREGATE

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Last updated: 25 Dec 2024

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Abstract

Demolished concrete which became million tons annually, so reuse of these concrete represents
a new source of aggregate. The aim of this paper is to study experimentally the effect of using
recycled crushed concrete as a coarse aggregate in concrete mix. The main variables considered in
this study were the recycled concrete aggregate (RCA) content (0, 25, 50, 75 and 100% by weight)
as substitution of natural aggregate (NA) and Cement content (250, 300, 350 and 400 kg/m"). The
strength development under compressive and tensile stresses was measured. Test results showed
that the behavior of concrete that contained recycled concrete aggregate and that contained natural
aggregate are nearly the same under compression and tension stress. The compressive strength
increases by increasing the recycled aggregate content from 25% up to 100%. The tensile strength
has optimum value at 50% recycled concrete aggregate content. Also it was found that the
compressive and tensile strengths of recycled concrete aggregate specimens were increased by
increasing cement content from 250 kg/m² up to 400 kg/m'. This is mainly due to the high
reactivity of the recycled concrete and cause alkali-silica bi-reaction.

DOI

10.21608/erjm.2004.82604

Keywords

Recycled concrete, Aggregate, cement, Strengths

Authors

First Name

Ayman

Last Name

Gamal

MiddleName

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Affiliation

Engineering Materials Dep., Faculty of Engineering, Zagazig University, Zagazig, EGYPT.

Email

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City

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Orcid

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First Name

Faiz

Last Name

A. Mirza

MiddleName

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Affiliation

Civil Engineering Dep., Faculty of Engineering and Islamic Arch. Umm - Elqura University, Maka, SUADI ARABIA

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Volume

27

Article Issue

1

Related Issue

12460

Issue Date

2004-01-01

Receive Date

2020-04-15

Publish Date

2004-01-01

Page Start

31

Page End

38

Print ISSN

1110-1180

Online ISSN

3009-6944

Article File

ERJM_Volume 27_Issue 1_Pages 31-38.pdf

PDF . 2.4MB

Link

https://erjm.journals.ekb.eg/article_82604.html

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https://erjm.journals.ekb.eg/service?article_code=82604

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Original Article

Type Code

1,118

Publication Type

Journal

Publication Title

ERJ. Engineering Research Journal

Publication Link

https://erjm.journals.ekb.eg/

MainTitle

REUTILIZATION OF RECYCLED CONCRETE AS CONCRETE COARSE AGGREGATE

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Article

Created At

22 Jan 2023