Rheological and Morphological Analysis of Polymer Modified Bitumen

Habib, Noor Zainab and Kamaruddin, Ibrahim and Napiah, Madzlan and Mohd Tan, Isa (2010) Rheological and Morphological Analysis of Polymer Modified Bitumen. In: International Conference on Sustainable Building and Infrastructure (ICSBI 2010), 15-17 June 2010, Kuala Lumpur Convention Centre.

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Rheological properties of the bitumen can be easily assessed by empirical test but with the increase in traffic volume and in axle loads, leads to the modification of bitumen by the use of polymer, which enhances its performance characteristics but significantly alters its rheological properties. Although both conventional and empirical binder tests are present to evaluate the properties of binders but still there is a need to study the binder properties in context with its flow characteristics and its colloidal structure. This paper discusses some of the results obtained from the laboratory investigation of thermoplastics, linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and its interaction with 80 pen base bitumen. The rheological study was made through penetration, ring & ball softening point and viscosity. The observations were then related to the changes in the rheological and morphological characteristics of the modified bitumen. Field emission scanning electron microscopy (FESEM) was used for the morphological analysis of both virgin base bitumen and PMB. The result shows that degree of modification depends upon the solvating power of bitumen, oxidation during mixing at higher temperature and interaction of polymer with base bitumen. Compatible network can only be formed when polymer is completely digested by the base bitumen. The solvency power of polymer in base bitumen also depends on polymer concentration and presence of asphaltene and maltenes in the bitumen. The results of the penetration, softening point and viscosity reflect amazing behaviour of thermoplastic which may exhibit promising performance, in rutting, fatigue and water susceptibility when analyzed at later stage of this study. In short best results were observed when the concentration of the polymer was kept below 3%.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TE Highway engineering. Roads and pavements
Departments / MOR / COE:Departments > Civil Engineering
ID Code:5866
Deposited By: Assoc Prof Dr Madzlan Napiah
Deposited On:02 Aug 2011 04:04
Last Modified:27 Mar 2014 21:57

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