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Original Articles

Laboratory investigations on SMA mixes with different additives

, &
Pages 11-18 | Received 31 Aug 2005, Accepted 30 Aug 2006, Published online: 30 Jan 2007
 

Abstract

Fibers are conventionally used as stabilizers in the construction of Stone Matrix Asphalt (SMA) pavements. These fibers are not manufactured in India and are imported from Germany. Naturally occurring jute fibers were coated with low viscosity binder and were used in the present study as an alternative to the patented fibers. Use of crumb rubber modified binder (CRMB) is also investigated as stabilizer in SMA mixes. The performance of these mix were evaluated by conducting draindown by two different methods, moisture susceptibility test, durability test, rutting test and fatigue life tests. German draindown test is not suitable for modified binder. NCAT basket test is better in evaluating mixes prepared with both stabilizers. The results of mix prepared with indigenously available fibers are comparable to the patented fibers. Mix prepared with modified binder alone provides encouraging results.

Notes

Additional information

Notes on contributors

Pawan Kumar

¶ ¶ [email protected]

Sunil Bose

§ § [email protected]

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