Engineering Properties of AC 60/70 Asphalt Cement Mixed with Natural and Crumb Rubbers

Gritsada Sua-iam, Kwanchanok Oonta-on, Nutchapongpol Kongchasing, Chakkarphan Sangsuwan, Anuruk Tappakron

Abstract


This research is to study the properties of AC 60/70 asphalt cement mixed with
natural and/or crumb rubbers. The AC 60/70 asphalt cement was replaced by natural
rubber at 5%, crumb rubbers at 11%, and mixed with natural rubber and crumb
rubbers at 8%. The suitable scale of dry crumb rubber was sizing from 0.25 mm down
and the testing of penetration, loss on heating, ductility, and stripping were measured.
The result finds the higher viscosity homogenized of natural rubber led from ternary
mixing material, better properties than binary mixing. The ternary mixing property
values are more inclined toward single mixing natural rubber to 55.32 mm, 0.081 g,
29.62 cm, and 4.68 scores of penetration, loss on heating, ductility, and stripping tests,
respectively. Ternary mixing natural and crumb rubbers should be subjected to more
testing at other ratios to find out its suitable proportion for better properties of asphalt
mixture.


Keywords


Asphalt cement, Natural rubber, Crumb rubbers, Properties, Ternary mixing

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References


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