Open Access Journal

ISSN : 2394-2320 (Online)

International Journal of Engineering Research in Computer Science and Engineering (IJERCSE)

Monthly Journal for Computer Science and Engineering

Open Access Journal

IInternational Journal of Engineering Research in Mechanical and Civil Engineering (IJERMCE)

Monthly Journal for Mechanical and Civil Engineering

ISSN : 2456-1290 (Online)

Improved Performance of Asphalt Concrete by Concentrated Latex Treatment

Author : Kongsak Akkharawongwhatthana 1 Apichat Suddeepong 2 Suksun Horpibulsuk 3 Apinun Buritatum 4

Date of Publication :20th May 2021

Abstract: The increased traffic volume and traffic axel load cause premature failure in the flexible pavement. The premature distress in the asphalt concrete (AC) significantly caused by the development of plastic deformation in the AC layer. Natural rubber is one of thermoplastic elastomers used in asphalt cement modification. With its inherent chemical property as an elastomer, natural rubber has the potential to improve the stability and elastic property of AC materials. This research aims to study performance of natural rubber modified asphalt with various aggregates in Thailand. Three difference types of aggregates, granite (G), basalt (B) and limestone (L) were used in this study. The natural rubber used in this study was in a form of concentrated latex (CL). The effect of CL in the performance of AC mixtures was evaluated by an extensive laboratory testing program, which included Marshall stability, indirect tensile strength (ITS), indirect tensile fatigue (ITF), and dynamic creep. The effectiveness of CL was illustrated by comparing the test results between asphalt mixtures with and without CL modification. The additional 3% of dry rubber of CL by total weight of binder (R/B = 3%) has potential to improve the indirect tensile strength, fatigue life and permanent deformation of all AC mixtures. The properties of the aggregate affect degree of performance improvement. The CL modified AC using limestone aggregate (the lowest ability to absorb asphalt binder) exhibits the lowest degree of improvement when compared with the CL modified AC using granite and basalt aggregates, respectively.

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