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Investigating the rheological and physical properties for unaged of crumb rubber modified binders containing warm mix asphalt additive

A. M. Bilema, Munder and Aman, Mohamad Y. and Ahmad, Kabiru A. (2017) Investigating the rheological and physical properties for unaged of crumb rubber modified binders containing warm mix asphalt additive. In: Global Civil Engineering Conference (GCEC 2017), 25-28 July 2017, Kuala Lumpur, Malaysia.

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Abstract

The growing usage of crumb rubber modified in flexible pavements justification the requirement for a good comprehension of its physical and rheological properties as well as its elastic behaviours. However, crumb rubber asphalt mixtures demand rising product temperatures than traditional asphalt binder due to the high viscosity of asphalt rubber binder. The main points of this research are to investigate the unaged rheological and physical properties of CRM asphalt. In this study, crumb rubber modified percentages was 0%, 5%, 10% and 15% from the binder weight, with adding 1.5% warm mix asphalt additive (Sasobit). The wet method was using to mix the CRM with bitumen, the CRM conducted at 177°C for 30 min whit 700rpm and Sasobit conducted at 120C° for 10 min with 1000rpm. The results display that various crumb rubber contents have important impacts on modified binder properties. The result shown that increase the complex shear G* and decreased the phase angle δ at high temperature with increased the CRM contents, for the rutting resistance parameter was rising with increased CRM percentages at 70°C. The softening results the temperature up with adding the CRM and the penetration result reduction with growing the CRM contents. The elastic recovery increased with higher CRM content. The storage stability was within the range for unmodified and 5% of CRM but for 10 % and 15% the result was over the range. From the results concluding that the CRM improve the elasticity and improvement the stiffness of the modified binder.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: CRM; WMA; rheology; physical properties
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions: Faculty of Civil and Environmental Engineering > Department of Infrastructure and Geomatic Engineering
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 30 Sep 2019 03:19
Last Modified: 30 Sep 2019 03:19
URI: http://eprints.uthm.edu.my/id/eprint/11641
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