SUSTAINABLE DEVELOPMENT USING CONTROLLED LOW-STRENGTH MATERIAL

This paper describes the use of controlled low-strength material (CLSM) in the United States, with an emphasis on the use of by-product and waste materials CLSM for infrastructure applications. CLSM is a self-leveling, cementitious material used as an alternative to compacted fill in applications including backfill, utility bedding, void fill, and bridge approaches. A general overview of the technology is presented, including a summary of current practice by state highway agencies in the United States. Discussions are presented on key technical properties of CLSM, including fresh and hardened properties, durability, excavatability, and environmental impact. This paper illustrates the important role that CLSM plays in safely and efficiently using by-product materials in a range of applications. 1