Effects of suspended and unsuspended additives in short-term aging process of binder

Recently, numerous additives have been blended in asphalt binder to enhance the performance of pavement mixture. However, the use of these modified binders can be problematic as their outcomes on site and in road construction are unpredictable. Meanwhile, many stick to using the same known additives...

Full description

Saved in:

Bibliographic Details
Main Author:	Ali, Tahseen Saad
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Chemicals Chemical industry
Online Access:	http://psasir.upm.edu.my/id/eprint/99078/1/FK%202014%2079%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.99078
record_format	uketd_dc
spelling	my-upm-ir.990782023-02-02T00:32:34Z Effects of suspended and unsuspended additives in short-term aging process of binder 2014-04 Ali, Tahseen Saad Recently, numerous additives have been blended in asphalt binder to enhance the performance of pavement mixture. However, the use of these modified binders can be problematic as their outcomes on site and in road construction are unpredictable. Meanwhile, many stick to using the same known additives because they are tested and the results predictable and do not experiment with new and possibly better alternatives that could yield improved results. The poor correlation of fatigue and rutting potentials of asphalt binder with the asphalt mix is the main concern in this research. Modified asphalt properties are different in specifications according to the additive type and behavior within the modified binder and as a result of this, there is a fear of unpredictable pavement failure. Such a passive attitude will mean ignoring the potential advantages of the asphalt concrete mix in favor of the asphalt binder which faces problems of rutting and fatigue. Accordingly, the additives are classified into two groups: non-suspended and suspended modified binders. Moreover, the suspended additives continue to be used and the inherent problems remain. These two groups have been compared as they are totally different in their physical properties – one melts while the other is suspended within the binder formation. This study evaluates the non-suspended and suspended additives. Each group consists of different types of additives. Group one (melted) is divided into two additives, ethylene vinyl acetate and tire rubber powder. Group two (suspended) consists of hydrated mineral filler and oil palm cellulose fiber. The physical tests penetration and softening point and the superpave test represents rotational viscosity, rolling thin film oven test RTFO for short-term aging and lastly DSR which are used to evaluate the non-suspended and suspended additives. The main tool for group evaluation is conducted by using the dissipated energy approach to diagnose the failure. The stress sweep test is chosen to run the DSR test. The results reveal the superior resistance to the shear resistance that is represented by the non-suspended additives modified binders. The limit state is established for the non-suspended additives especially for the NSEU (2%-8%) and NSEA (4%-8%). Lastly, the non-suspended modified binders reduce the rutting problems more than the suspended additives modified binders. Chemicals Chemical industry 2014-04 Thesis http://psasir.upm.edu.my/id/eprint/99078/ http://psasir.upm.edu.my/id/eprint/99078/1/FK%202014%2079%20IR.pdf text en public masters Universiti Putra Malaysia Chemicals Chemical industry Muniandy, Ratnasamy
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Muniandy, Ratnasamy
topic	Chemicals Chemical industry
spellingShingle	Chemicals Chemical industry Ali, Tahseen Saad Effects of suspended and unsuspended additives in short-term aging process of binder
description	Recently, numerous additives have been blended in asphalt binder to enhance the performance of pavement mixture. However, the use of these modified binders can be problematic as their outcomes on site and in road construction are unpredictable. Meanwhile, many stick to using the same known additives because they are tested and the results predictable and do not experiment with new and possibly better alternatives that could yield improved results. The poor correlation of fatigue and rutting potentials of asphalt binder with the asphalt mix is the main concern in this research. Modified asphalt properties are different in specifications according to the additive type and behavior within the modified binder and as a result of this, there is a fear of unpredictable pavement failure. Such a passive attitude will mean ignoring the potential advantages of the asphalt concrete mix in favor of the asphalt binder which faces problems of rutting and fatigue. Accordingly, the additives are classified into two groups: non-suspended and suspended modified binders. Moreover, the suspended additives continue to be used and the inherent problems remain. These two groups have been compared as they are totally different in their physical properties – one melts while the other is suspended within the binder formation. This study evaluates the non-suspended and suspended additives. Each group consists of different types of additives. Group one (melted) is divided into two additives, ethylene vinyl acetate and tire rubber powder. Group two (suspended) consists of hydrated mineral filler and oil palm cellulose fiber. The physical tests penetration and softening point and the superpave test represents rotational viscosity, rolling thin film oven test RTFO for short-term aging and lastly DSR which are used to evaluate the non-suspended and suspended additives. The main tool for group evaluation is conducted by using the dissipated energy approach to diagnose the failure. The stress sweep test is chosen to run the DSR test. The results reveal the superior resistance to the shear resistance that is represented by the non-suspended additives modified binders. The limit state is established for the non-suspended additives especially for the NSEU (2%-8%) and NSEA (4%-8%). Lastly, the non-suspended modified binders reduce the rutting problems more than the suspended additives modified binders.
format	Thesis
qualification_level	Master's degree
author	Ali, Tahseen Saad
author_facet	Ali, Tahseen Saad
author_sort	Ali, Tahseen Saad
title	Effects of suspended and unsuspended additives in short-term aging process of binder
title_short	Effects of suspended and unsuspended additives in short-term aging process of binder
title_full	Effects of suspended and unsuspended additives in short-term aging process of binder
title_fullStr	Effects of suspended and unsuspended additives in short-term aging process of binder
title_full_unstemmed	Effects of suspended and unsuspended additives in short-term aging process of binder
title_sort	effects of suspended and unsuspended additives in short-term aging process of binder
granting_institution	Universiti Putra Malaysia
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/99078/1/FK%202014%2079%20IR.pdf
_version_	1776100289407877120

Effects of suspended and unsuspended additives in short-term aging process of binder

Similar Items