Effect of amorphous rice husk silica additionon the structure of asphalt composite

Authors

Simon Sembiring
Agus Riyanto
Rudy Situmeang
Zipora SEMBIRING
Nita Susanti
Iqbal Firdaus

Publication Date

2020-12-01

Abstract

In this study, modified asphalt composites were produced by adding silica extracted from rice husk.The mass ratios of asphalt to silica are 1:0, 1:1.6, 1:1.8, and 1:2 and calcined at the temperature of 150C for 6 h.The structural and microstructural characteristics of asphalt composites were examinedby x-ray diffraction (XRD),Scanning Electron Microscopy/Energy Dispersive x-ray (SEM-EDX) Spectroscopy and Differential Thermal Analysis (DTA-TGA),respectively. The XRDstudy revealed that the major phases were carbon and amorphous silica. The surface morphology of asphalt without silica addition presents a cluster of larger size than the cluster of asphalt with an addition of silica. The addition of silica significantly increased the thermal stability of the asphalt due to the formation of a physically cross-linkedsilica network structure. DTA/TGAanalyses produced that temperature decomposition increased with the increasing silica addition from 230°Cto 315C. Based on these characteristics, the samples are considered for the roof material, suggesting their potential use in substitutelightweight steel roof devices.

First Page

113

Last Page

118

Recommended Citation

Sembiring, Simon; Riyanto, Agus; Situmeang, Rudy; SEMBIRING, Zipora; Susanti, Nita; and Firdaus, Iqbal (2020) "Effect of amorphous rice husk silica additionon the structure of asphalt composite," Journal of Metals, Materials and Minerals: Vol. 30: No. 4, Article 14.
Available at: https://digital.car.chula.ac.th/jmmm/vol30/iss4/14