GraFar - Repository of the Faculty of Civil Engineering
Faculty of Civil Engineering of the University of Belgrade
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrillic)
    • Serbian (Latin)
  • Login
View Item 
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
  •   GraFar
  • GraFar
  • Radovi istraživača / Researcher's publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Influence of acid treatment and carbonation on the properties of recycled concrete aggregate

Authorized Users Only
2017
Authors
Radević, Aleksandar
Despotović, Iva
Zakić, Dimitrije
Orešković, Marko
Jevtić, Dragica
Article (Published version)
Metadata
Show full item record
Abstract
Recycled concrete aggregate (RCA), obtained by crushing of original (old) concrete, consists of natural aggregate grains and a cement mortar matrix. The presence of old adhered cement mortar, which has higher porosity than natural aggregate, causes unfavourable properties of RCA. The research conducted in order to improve the quality of RCA and to enable its greater application in the construction industry is presented in this paper. Therefore, RCA was subjected to quality improvement treatments with hydrochloric acid and carbon dioxide (accelerated carbonation). The first procedure was aimed at partially removing the adhered cement mortar and the second at reinforcing the cement matrix. The physical, mechanical and chemical properties of all three types of RCA were tested. After the pre-soaking acid treatment (0.1 mol/dm3 HCl), RCA showed reduced water absorption (up to 3%); the process of accelerated carbonation also led to reduced water absorption (13–20%) as well as to ...improved mechanical properties (∼10%). A scanning electron microscopy investigation revealed that the carbonation process, as expected, significantly reduces porosity of RCA. The overall results show that if RCA is obtained by crushing of compact, high- -quality concrete, the procedures of aggregate quality improvement are not necessary

Keywords:
accelerated carbonation / pre-soaking in acid / recycled concrete aggregate
Source:
Chemical Industry & Chemical Engineering Quarterly, 2017, 24(1)
Funding / projects:
  • TR 36048
  • TR 36017

DOI: 10.2298/CICEQ161202014R

ISSN: 1451-9372

WoS: 000430423900003

Scopus: 2-s2.0-85046015241
[ Google Scholar ]
11
8
URI
https://grafar.grf.bg.ac.rs/handle/123456789/1995
Collections
  • Radovi istraživača / Researcher's publications
  • Катедра за материјале и конструкције
  • Катедра за путеве, аеродроме и железнице
Institution/Community
GraFar
TY  - JOUR
AU  - Radević, Aleksandar
AU  - Despotović, Iva
AU  - Zakić, Dimitrije
AU  - Orešković, Marko
AU  - Jevtić, Dragica
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1995
AB  - Recycled concrete aggregate (RCA), obtained by crushing of original (old)
concrete, consists of natural aggregate grains and a cement mortar matrix. The
presence of old adhered cement mortar, which has higher porosity than natural
aggregate, causes unfavourable properties of RCA. The research conducted in
order to improve the quality of RCA and to enable its greater application in the
construction industry is presented in this paper. Therefore, RCA was subjected
to quality improvement treatments with hydrochloric acid and carbon dioxide
(accelerated carbonation). The first procedure was aimed at partially removing
the adhered cement mortar and the second at reinforcing the cement matrix. The
physical, mechanical and chemical properties of all three types of RCA were
tested. After the pre-soaking acid treatment (0.1 mol/dm3 HCl), RCA showed
reduced water absorption (up to 3%); the process of accelerated carbonation
also led to reduced water absorption (13–20%) as well as to improved mechanical
properties (∼10%). A scanning electron microscopy investigation revealed
that the carbonation process, as expected, significantly reduces porosity of RCA.
The overall results show that if RCA is obtained by crushing of compact, high-
-quality concrete, the procedures of aggregate quality improvement are not necessary
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - Influence of acid treatment and carbonation on the properties of recycled concrete aggregate
VL  - 24(1)
DO  - 10.2298/CICEQ161202014R
ER  - 
@article{
author = "Radević, Aleksandar and Despotović, Iva and Zakić, Dimitrije and Orešković, Marko and Jevtić, Dragica",
year = "2017",
abstract = "Recycled concrete aggregate (RCA), obtained by crushing of original (old)
concrete, consists of natural aggregate grains and a cement mortar matrix. The
presence of old adhered cement mortar, which has higher porosity than natural
aggregate, causes unfavourable properties of RCA. The research conducted in
order to improve the quality of RCA and to enable its greater application in the
construction industry is presented in this paper. Therefore, RCA was subjected
to quality improvement treatments with hydrochloric acid and carbon dioxide
(accelerated carbonation). The first procedure was aimed at partially removing
the adhered cement mortar and the second at reinforcing the cement matrix. The
physical, mechanical and chemical properties of all three types of RCA were
tested. After the pre-soaking acid treatment (0.1 mol/dm3 HCl), RCA showed
reduced water absorption (up to 3%); the process of accelerated carbonation
also led to reduced water absorption (13–20%) as well as to improved mechanical
properties (∼10%). A scanning electron microscopy investigation revealed
that the carbonation process, as expected, significantly reduces porosity of RCA.
The overall results show that if RCA is obtained by crushing of compact, high-
-quality concrete, the procedures of aggregate quality improvement are not necessary",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "Influence of acid treatment and carbonation on the properties of recycled concrete aggregate",
volume = "24(1)",
doi = "10.2298/CICEQ161202014R"
}
Radević, A., Despotović, I., Zakić, D., Orešković, M.,& Jevtić, D.. (2017). Influence of acid treatment and carbonation on the properties of recycled concrete aggregate. in Chemical Industry & Chemical Engineering Quarterly, 24(1).
https://doi.org/10.2298/CICEQ161202014R
Radević A, Despotović I, Zakić D, Orešković M, Jevtić D. Influence of acid treatment and carbonation on the properties of recycled concrete aggregate. in Chemical Industry & Chemical Engineering Quarterly. 2017;24(1).
doi:10.2298/CICEQ161202014R .
Radević, Aleksandar, Despotović, Iva, Zakić, Dimitrije, Orešković, Marko, Jevtić, Dragica, "Influence of acid treatment and carbonation on the properties of recycled concrete aggregate" in Chemical Industry & Chemical Engineering Quarterly, 24(1) (2017),
https://doi.org/10.2298/CICEQ161202014R . .

DSpace software copyright © 2002-2015  DuraSpace
About the GraFar Repository | Send Feedback

OpenAIRERCUB
 

 

All of DSpaceCommunitiesAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About the GraFar Repository | Send Feedback

OpenAIRERCUB