Design of Rubberized Asphalt Concrete by Means of Coarse Aggregate Void Filling Method

Abstract:

In order to find a convenient approach to design the mix of rubberized asphalt concrete (RAC) and make full use of the properties of RAC, a kind of RAC-13 (13 is the nominal maximum aggregate size of the mixture) was designed by means of coarse aggregate void filling method (CAVF). A series of conventional tests of asphalt mixture with five asphalt-rubber aggregate ratio(ARAR) were carried out to check the target mix design and evaluate the performance of RAC. Performance evaluation tests such as Marshall and submerged Marshall stability test, moisture damage test and wheel tracking test were included. Test results show that the high temperature stability, moisture susceptibility and road performance of RAC-13 designed with CAVF method are all favorable. The recommended optimum asphalt-rubber aggregate ratio(OARAR) is 7.1% under the condition of skeleton structure. CAVF is a good means for designing RAC to ensure its stone-on-stone contact structure.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 215-220
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.215
• Online since: February 2012
• Authors: Kuang Huai Wu, Guo Liang Yang, Ai Yu Zeng
• Keywords: Coarse Aggregate Void Filling (CAVF) Method, Mixture Design, Performance, Rubberized Asphalt Concrete (RAC), Stone Skeleton Structure

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