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Correlation of ucs and cbr on lightweight geocomposite of soil-eps stabilized by waste of buton asphalt
Rauf I.
Materials Science Forum
Q4Abstract
The conventional embankment has disadvantages in terms of its weight; it has an implication for the level of deformation that will occur on the subgrade layer. This study was conducted dealing with the design of geocomposite material compositions based on their mechanic characteristics. The lightweight geocomposit material (LWGM) was constructed by composing soil with expanded polystyrene (EPS) with by-product of buton asphalt as the binder agent (WBA). Unconfined Compression Test (UCT) and California Bearing Ratio (CBR) were examined to figure out the mechanical behavior of LWGM. The percentages of WBA used on specimens were 3%, 5%, 7% and 9%, while those of EPS were 0.15% and 0.30%, based on weight of soils dry density. Furthermore, to understand the curing period effect, all the specimens were cured and tested within 7 days and 28 days. The results showed that the LWGM could reduce the embankment densities from 20% to 35%, compared to conventional embankment. The compressive strength and CBR values presented the same tendency, so that, based on correlation of UCS and CBR value, the LWGM compositions that are appropriate for road foundation criteria as subbase courses are 3.2% to 7% for the WBA and 0,15% - 0,30% for the EPS.