Study of Bottom Ash mixed Cement and Para-Rubber Latex for as Alternative Highway Materials

Abstract

This research investigates the appropriated mixture of bottom ash mixed with Portland cement and Para-Rubber latex as the alternative highway materials. Bottom ash used in this research was divided into 3 categories as follows: (1) well-graded bottom ash, (2) bottom ash passing #4 sieve, and (3) bottom ash passing 3/8 in sieve. Each category was mixed with Portland cement of 0%, 2%, 4%, 6%, 8% and 10%, and Para-Rubber latex of 0%, 5%, 10% and 15% by weight of bottom ash, respectively. The appropriated mixtures were selected by considering according to the unconfined compressive strength of 1,724 kPa and 2,412 kPa for light traffic and heavy traffic, respectively. Results from modified compaction test revealed that the appropriated contents of Para-Rubber latex in two orders were 6% and 8%. The appropriated contents of Portland cement from unconfined compression test were 5% for light traffic and 7% for heavy traffic. It can be summarize the appropriated mixtures of bottom ash mixed with Portland cement and Para-Rubber latex were B95%C5%R6% and B93%C7%R6%. According these mixtures, the C.B.R. of the samples with 7 curing days was greater than that of samples without curing approximately 3 times. Moreover, this study shown the strength of soaked samples was lower than that of unsoaked samples about 5%. The results from skidding resistance test indicated these mixtures can be used for the straight road, with easy gradients and curves, without junction.