This self-flowing property leads to its many advantages. Advantages and Disadvantages CLSM s fluid-like property allows it to be placed without compaction. Although it costs about as much as concrete, it can be more economical than conventional excavation and void filling operations. It fills a cavity as it is poured, requiring a minimum of labor. Therefore it saves the labor and equipment expense of compaction as fewer people are required to place the material than in traditional backfill methods.
Worker safety is also an advantage.
Workers need not work in trenches compacting soil, with vibratory equipment. They spend less time in work zones with vehicles driving by the site. The use of CLSM reduces the time a trench or excavation is open. Once placed, traffic can resume after a steel plate or soil has been placed over it. Prior to paving or other surface treatment, crews can remove the soil-like CLSM to finish grade.