A study of crumb rubber modified bitumen used in South Africa

In South Africa, an empirical characterisation of crumb rubber modified (CRM) bituminous binders has historically been the only means of predicting their performance in pavement layers, short of constructing pavement test sections. An improved characterisation is provided by means of rheological ana...

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Main Authors: Mturi, G.A.J., O'Connell, J., Zoorob, S.E., De Beer, M.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.31120 /
Published: Taylor and Francis Ltd. 2014
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911414286&doi=10.1080%2f14680629.2014.910130&partnerID=40&md5=2b7092102b04392639126f520662ceef
http://eprints.utp.edu.my/31120/
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spelling utp-eprints.311202022-03-25T09:00:18Z A study of crumb rubber modified bitumen used in South Africa Mturi, G.A.J. O'Connell, J. Zoorob, S.E. De Beer, M. In South Africa, an empirical characterisation of crumb rubber modified (CRM) bituminous binders has historically been the only means of predicting their performance in pavement layers, short of constructing pavement test sections. An improved characterisation is provided by means of rheological analysis using a dynamic shear rheometer (DSR). However, the heterogeneous morphology of CRM bitumen makes it a challenge to test using current methods and equipment. DSR testing of CRM bitumen requires a plate gap adjustment to avoid any influence by the rubber particles. This has been done by monitoring the effect of changing the DSR plate gap setting on the measured linear visco-elastic properties of the binder. An adjusted gap was adopted for rheological measurements so as to characterise CRM bitumen properties with ageing. But, the incomplete recovery of CRM binder from asphalt/seals makes it impossible to monitor the rheological properties of the in situ binder within a pavement layer. This has led to indirect methods of investigating relationships between tested properties of the pure CRM bitumen to those of the in situ binder. © 2014, © 2014 Taylor & Francis. Taylor and Francis Ltd. 2014 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911414286&doi=10.1080%2f14680629.2014.910130&partnerID=40&md5=2b7092102b04392639126f520662ceef Mturi, G.A.J. and O'Connell, J. and Zoorob, S.E. and De Beer, M. (2014) A study of crumb rubber modified bitumen used in South Africa. Road Materials and Pavement Design, 15 (4). pp. 774-790. http://eprints.utp.edu.my/31120/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description In South Africa, an empirical characterisation of crumb rubber modified (CRM) bituminous binders has historically been the only means of predicting their performance in pavement layers, short of constructing pavement test sections. An improved characterisation is provided by means of rheological analysis using a dynamic shear rheometer (DSR). However, the heterogeneous morphology of CRM bitumen makes it a challenge to test using current methods and equipment. DSR testing of CRM bitumen requires a plate gap adjustment to avoid any influence by the rubber particles. This has been done by monitoring the effect of changing the DSR plate gap setting on the measured linear visco-elastic properties of the binder. An adjusted gap was adopted for rheological measurements so as to characterise CRM bitumen properties with ageing. But, the incomplete recovery of CRM binder from asphalt/seals makes it impossible to monitor the rheological properties of the in situ binder within a pavement layer. This has led to indirect methods of investigating relationships between tested properties of the pure CRM bitumen to those of the in situ binder. © 2014, © 2014 Taylor & Francis.
format Article
author Mturi, G.A.J.
O'Connell, J.
Zoorob, S.E.
De Beer, M.
spellingShingle Mturi, G.A.J.
O'Connell, J.
Zoorob, S.E.
De Beer, M.
A study of crumb rubber modified bitumen used in South Africa
author_sort Mturi, G.A.J.
title A study of crumb rubber modified bitumen used in South Africa
title_short A study of crumb rubber modified bitumen used in South Africa
title_full A study of crumb rubber modified bitumen used in South Africa
title_fullStr A study of crumb rubber modified bitumen used in South Africa
title_full_unstemmed A study of crumb rubber modified bitumen used in South Africa
title_sort study of crumb rubber modified bitumen used in south africa
publisher Taylor and Francis Ltd.
publishDate 2014
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911414286&doi=10.1080%2f14680629.2014.910130&partnerID=40&md5=2b7092102b04392639126f520662ceef
http://eprints.utp.edu.my/31120/
_version_ 1741197522173427712
score 11.62408

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