International Conference on Future Trends In Civil and Structural Engineering - FTCSE 2014
Author(s) : HERMAN PARUNG, MUH. NASHIR T, NUR ALI, TRI HARIANTO
The use of additional material such as fibers in concrete asphalt mixture may affect the micro structure of the mixture. The micro-structural change is identifiable by the existence of various sub-atomic particles. In general, the study aims to investigate the effect of fibers addition on the micro-structural atomic changes in porous concrete asphalt mixture with asphalt material of oil-based (penetration of 60/70) and of polymer asphalt stabilised with polypropylene. The study was carried out by performing a test on samples by means of XRD (X-ray diffraction) and SEM (scanning electron microscope). The study shows that the petroleum-based asphalt pen 60/70 has compound elements of Carbon (C70), Cyclo-octasulphur monoxide (S8O) and Cristobalite beta (SiO2), while the petroleum-based asphalt pen 60/70 enhanced with polypropylene fibers has compound elements of Carbon (C70), Cyclo-tris(suphur VI)oxide with chemical formula of SO3, Cristobalite beta (SiO2), and Carpathite compound C24H12. The polymer asphalt added with polypropylene fibers has compound elements of Octacarbon (C8), SiO2, Sulphur trioxide SO3 and D-Tartaric acid hydrateC4 H6O6. SEM test result of porous concrete asphalt indicates that the existence of pores functioning to drain water through the concrete mixture. The study concludes that there is a difference of compound elements in the petroleum-based asphalt pen. 60/70 added with fibers i.e. Carpathite C24H12 while in polymer asphalt added with fibers, there are compounds of D-tartaric acid hydrate C4 H6 O6 with different compositions. Porous petroleum-based concrete asphalt mixture and polymer asphalt added with fibers have a better distribution and bonds among pores.