Abstract
AbstractHydrated cement–treated crushed rock base (HCTCRB) is produced by adding 2% Portland cement (by mass) to a standard crushed rock base (CRB) at an optimum moisture condition. The unique production process for HCTCRB is different from that of a common cement-treated base in that a remixing process is performed after the hydration of cement, preventing cementitious bonding to maintain the unbound material characteristics with an improvement in material engineering properties. This paper presents the resilient modulus (MR) and permanent deformation (PD) characteristics of HCTCRB after variable hydration periods, water addition during compaction, and dryback. The difference in material hydration periods affected the performance of HCTCRB. However, in this study, a consistent performance trend with various hydration periods could not be found. Moisture contents have a major influence on the properties of HCTCRB. The results indicate that a higher moisture content increases the PD and decreases the MR of...
Highlights
Cement stabilization for road pavements was first developed in Australia in the 1950s (Yeo and Nikraz 2011)
This paper presents an investigation of the mechanical behavior of hydrated cement–treated crushed rock base (HCTCRB) through repeated-load triaxial (RLT) test results with related resilient modulus and permanent deformation characteristics
This study investigated the effect of hydration periods, water addition during compaction, and dryback on the permanent deformation (PD) and MR of HCTCRB
Summary
Cement stabilization for road pavements was first developed in Australia in the 1950s (Yeo and Nikraz 2011). Practical factors during the production and construction of HCTCRB, such as hydration periods, addition of water during compaction, and the dryback process, were investigated to understand how these factors affect the performance of HCTCRB.
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