Water reducing agent effects on the engineering performance of cement stabilized aggregates

Document Type: Article

Authors

1 School of Highway, Chang’an University, Xi’an 710064 P.R. China

2 chool of Highway, Chang’an University, Xi’an 710064 P.R. China

Abstract

Water reducing agents (WRAs) are usually utilized in cement concretes to reduce the water-cement ration, increasing mechanical strength and improving the durability of concrete structures. As a kind of widely used construction materials in pavement structures, i.e., base or subbase course, cement stabilized aggregates (CSAs) have to face their own problems, e.g., drying shrinkage at early ages. To evaluate the feasibility of water reducing agent in cement stabilized aggregates, and its effects on engineering performance, six groups of cement stabilized aggregates were prepared (water reducing content = 0, 0.5, 1.0, 1.5, 2.0 and 2.5 wt.%). Engineering performances including density-water relationships, unconfined compressive strength (UCS), tensile splitting strength (TSS), compressive resilience modulus (CRM) and drying shrinkage strain(DSS) were measured. Result indicates that water reducing agents used in this study can significantly benefit the engineering performances of cement stabilized aggregates. The function or role of water reducing agent in cement stabilized aggregates were summarized, which would be beneficial to guide the water reducing agent utilization in cement stabilized aggregates.

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