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Effects of mixing process on polypropylene modified bituminous concrete mix properties

Habib, , Noor Zainab and Kamaruddin, Ibrahim and Napiah, Madzlan and Isa, M Tan (2011) Effects of mixing process on polypropylene modified bituminous concrete mix properties. [Citation Index Journal]

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Abstract

This paper presents a research conducted to investigate the effect of mixing process on polypropylene (PP) modified bitumen mixed with well graded aggregate to form modified bituminous concrete mix. Two mode of mixing, namely dry and wet with different concentration of polymer polypropylene was used with 80/100 pen bitumen, to evaluate the bituminous concrete mix properties. Three percentages of polymer varying from 1-3% by the weight of bitumen was used in this study. Three mixes namely control mix, wet mix and dry mix were prepared. Optimum binder content was calculated considering Marshall Stability, flow, air voids and Marshall Quotient at different bitumen content varying from 4% - 6.5% for control, dry and wet mix. Engineering properties thus obtained at the calculated optimum bitumen content revealed that wet mixing process is advantageous in comparison to dry mixing as it increases the stiffness of the mixture with the increase in polymer content in bitumen. Stiffness value for wet mix increases with the increase in polymer content which is beneficial in terms of rutting. 1% PP dry mix also shows enhanced stiffness, with the air void

Item Type:Citation Index Journal
Subjects:T Technology > TE Highway engineering. Roads and pavements
Departments / MOR / COE:Centre of Excellence > Centre for Automotive Research
Departments > Civil Engineering
ID Code:6922
Deposited By: Assoc Prof Dr Isa Mohd Tan
Deposited On:05 Dec 2011 03:01
Last Modified:28 Mar 2014 07:44

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