Experimental investigation of the performance of palm kernel shell and periwinkle shell as partial replacement for coarse aggregate in asphaltic concrete
Abstract
Performance of non-conventional materials namely palm kernel shell (PKS) and periwinkle shell (PWS) were investigated. Sieve analysis, aggregate impact value (AIV), aggregate crushing value (ACV), bitumen penetration, Marshall Stability, flash and fire point were carried out in accordance with American Standard for Materials and Testing (ASTM) and British Standard (BS) specifications. A total of thirty-six samples were prepared by partially replacing coarse aggregate with PKS and PWS at 0%, 10%, 20%, 30%, 40% and 50%. The AIV and ACV values of 35.85% and 11.49% were obtained for PWS, while 6.42% and 9.22% respectively were obtained for PKS; this is usable for wearing course. The 10% partial replacement with PWS has Marshall Stability value of 2.33kN; 10% and 20% partial replacement with PKS has Marshall Stability values of 3.0kN and 2.2kN respectively, while 10%, 20% and 30% partial replacement with combination of PWS and PKS has Marshall Stability values of 3.22kN, 2.41kN and 2.21kN respectively; thus satisfying the requirement for light traffic road. Also, 10% and 20% partial replacement with the combination of PWS and PKS gives a flow value of 8.9 mm and 8.5 mm which can be used for light traffic. Hence, 10% to 20% partial replacement of coarse aggregate with PWS and PKS can be used as alternative material in asphaltic concrete to reduce the cost of construction.
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