Performance of Hydrated Cement Treated Crushed Rock Base as a Road Base Material in Western Australia
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Hydrated Cement Treated Crushed Rock Base (HCTCRB) is produced by adding 2%-Portland cement with standard crushed rock base. The mixture is disturbed after the specific hydration period to prevent setting up and retain its unbound property. HCTCRB has been commonly adopted for Western Australian roads, however based on empirical method and experiences. Thus, the characterisation of HCTCRB following the pavement mechanistic approach is needed. This paper aims to presents the performances of HCTCRB in terms of permanent deformation and resilient modulus. The repeated load triaxial tests were performed to study the performances of HCTCRB that affected by manufacturing (hydration period) and construction procedures (amount of water added during compaction and dry back). This study has found that HCTCRB exhibited the stress dependent behaviour. All these studied factors significantly affect the resilient performances of HCTCRB in dissimilar trends. The certain impact on the material performances related to the hydration periods still could not be concluded. The higher water addition even at the optimum moisture content of HCTCRB resulted in the poorer performances, although it induced the higher dry density, which indicated that the HCTCRB is still susceptibility to moisture content. The dryback process has potential to improve the material performances of the material in different level which depends on amount of additional water. All the tested results indicated the significant influence of moisture content to the performances of HCTCRB with regardless of the dry density.
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Siripun, Komsun (2010)Western Australia (WA) has a road network of approximately 177,700 km, including a 17,800 km stage highway system (Main Roads Western Australia 2009). This infrastructure supports a population of only about two million, ...
Resilient modulus of hydrated cement treated crushed rock base (HCTCRB) for road base material in Western AustraliaChummuneerat, Suphat; Jitsangiam, Peerapong; Nikraz, Hamid (2012)Hydrated Cement Treated Crushed Rock Base (HCTCRB) is a modified base course material, with anadditional of 2% Portland cement (by mass) to a standard crushed rock base. Based on the HCTCRB application protocol, the mix ...
Chummuneerat, Suphat; Jitsangiam, Peerapong; Nikraz, Hamid (2011)Hydrated Cement Treated Crushed Rock Base (HCTCRB) is a unique base course material instigated and broadened in Western Australia roads. The HCTCRB concept was originated by blending small amount (1 to 2% by mass) of ...