Abstract
Controlled low strength material (CLSM) is a self-levelling and self-compacting material that is used as a backfill material in place of compacted soils. Flowable fills require no tamping or compaction to achieve the strength. Various CLSM mixtures were prepared by using fly ash, quarry dust, blast furnace slag and cement. For all the mixes, the cement content is kept constant at 5%. The amount of mixing water is chosen in order to provide a flowability value of 250 mm. The mixtures are inspected for series of tests in fresh state and hardened state. Properties like flowability, bleeding, fresh density and compressive strength are studied. Apart from the short-term performance, long-term performance of CLSM samples is studied by conducting durability test. The results indicate that the replacement of fly ash by quarry dust or blast furnace slag showed satisfying performance and developed CLSM are suitable for various applications.
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