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Aging properties of HMB15 with varying binder film thicknesses

In order to cope with the ever-increasing traffic loading and to minimise the cost of road construction and maintenance, several road trials of high modulus base (HMB) materials containing a 15 penetration grade bitumen (known as HMB15) have been carried out in the UK since 1990s. It has been showed...

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Main Authors:	Wu, Jiantao, Md. Yusoff, Nur Izzi, Chen, Jun, Liu, Yun, Hainin, Mohd. Rosli, Airey, Gordon D.
Format:	Article
Published:	2012
Subjects:	HQ The family. Marriage. Woman
Online Access:	http://eprints.utm.my/id/eprint/46570/
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id	my.utm.46570
record_format	eprints
spelling	my.utm.465702017-09-14T05:13:23Z http://eprints.utm.my/id/eprint/46570/ Aging properties of HMB15 with varying binder film thicknesses Wu, Jiantao Md. Yusoff, Nur Izzi Chen, Jun Liu, Yun Hainin, Mohd. Rosli Airey, Gordon D. HQ The family. Marriage. Woman In order to cope with the ever-increasing traffic loading and to minimise the cost of road construction and maintenance, several road trials of high modulus base (HMB) materials containing a 15 penetration grade bitumen (known as HMB15) have been carried out in the UK since 1990s. It has been showed that, although HMB 15 behaved in a similar way to conventional dense bitumen Macadam with a cost saving of approximately 25%, its long-term durability (aging and moisture damage) is still a major concern of researchers as considerable deteriorations have been commonly observed during the ongoing investigations on cored samples from the sites (either with or without traffic loading). The aim of this paper was to quantitatively show the relationship between aging properties of HMBl5 and its binder film thickness (binder content), so that an optimum binder content could be determined. In order to achieve this, 5 groups of cylindrical HMB 15 specimens with different binder contents (3.5%, 4%, 4.5%, 5% and 5.5%) were fabricated and subjected to SHRP long-term oven aging test (at 85°C for 5 days), their mechanical properties both before and after aging simulation were tested using indirect tensile stiffness modulus (ITSM) tests. In addition, binders were recovered at different aging stages and their rheological characteristics were investigated with dynamic shear rheometer (DSR) tests. Based on these, aging indices of different groups were calculated and their mathematical relationship with binder film thicknesses was regressed. The results showed that the aging properties of HMB 15 mixtures were significantly affected by their binder film thicknesses. However, regression analysis between aging indices and binder film thicknesses indicated that, as the binder film becomes thicker than 9.5 μm, the change of aging indices with film thicknesses becomes minor and therefore, a film thickness of approximately 9.5 μm was recommended for HMB15 mixtures. 2012 Article PeerReviewed Wu, Jiantao and Md. Yusoff, Nur Izzi and Chen, Jun and Liu, Yun and Hainin, Mohd. Rosli and Airey, Gordon D. (2012) Aging properties of HMB15 with varying binder film thicknesses. Sains Malaysiana, 41 (12). pp. 1595-1603. ISSN 0126-6039
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	HQ The family. Marriage. Woman
spellingShingle	HQ The family. Marriage. Woman Wu, Jiantao Md. Yusoff, Nur Izzi Chen, Jun Liu, Yun Hainin, Mohd. Rosli Airey, Gordon D. Aging properties of HMB15 with varying binder film thicknesses
description	In order to cope with the ever-increasing traffic loading and to minimise the cost of road construction and maintenance, several road trials of high modulus base (HMB) materials containing a 15 penetration grade bitumen (known as HMB15) have been carried out in the UK since 1990s. It has been showed that, although HMB 15 behaved in a similar way to conventional dense bitumen Macadam with a cost saving of approximately 25%, its long-term durability (aging and moisture damage) is still a major concern of researchers as considerable deteriorations have been commonly observed during the ongoing investigations on cored samples from the sites (either with or without traffic loading). The aim of this paper was to quantitatively show the relationship between aging properties of HMBl5 and its binder film thickness (binder content), so that an optimum binder content could be determined. In order to achieve this, 5 groups of cylindrical HMB 15 specimens with different binder contents (3.5%, 4%, 4.5%, 5% and 5.5%) were fabricated and subjected to SHRP long-term oven aging test (at 85°C for 5 days), their mechanical properties both before and after aging simulation were tested using indirect tensile stiffness modulus (ITSM) tests. In addition, binders were recovered at different aging stages and their rheological characteristics were investigated with dynamic shear rheometer (DSR) tests. Based on these, aging indices of different groups were calculated and their mathematical relationship with binder film thicknesses was regressed. The results showed that the aging properties of HMB 15 mixtures were significantly affected by their binder film thicknesses. However, regression analysis between aging indices and binder film thicknesses indicated that, as the binder film becomes thicker than 9.5 μm, the change of aging indices with film thicknesses becomes minor and therefore, a film thickness of approximately 9.5 μm was recommended for HMB15 mixtures.
format	Article
author	Wu, Jiantao Md. Yusoff, Nur Izzi Chen, Jun Liu, Yun Hainin, Mohd. Rosli Airey, Gordon D.
author_facet	Wu, Jiantao Md. Yusoff, Nur Izzi Chen, Jun Liu, Yun Hainin, Mohd. Rosli Airey, Gordon D.
author_sort	Wu, Jiantao
title	Aging properties of HMB15 with varying binder film thicknesses
title_short	Aging properties of HMB15 with varying binder film thicknesses
title_full	Aging properties of HMB15 with varying binder film thicknesses
title_fullStr	Aging properties of HMB15 with varying binder film thicknesses
title_full_unstemmed	Aging properties of HMB15 with varying binder film thicknesses
title_sort	aging properties of hmb15 with varying binder film thicknesses
publishDate	2012
url	http://eprints.utm.my/id/eprint/46570/
_version_	1643652074456481792
score	13.211869

Aging properties of HMB15 with varying binder film thicknesses

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