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Title: CLSM Containing Cement Kiln Dust

Author(s): Mohamed Lachemi, Khandaker M.A. Hossain, Abdurrahmaan Lotfy, Medhat Shehata, Mustafa Sahmaran

Publication: Concrete International

Volume: 31

Issue: 6

Appears on pages(s): 47-52

Keywords: backfill; byproduct; cement kiln dust; controlled low-strength material


Date: 6/1/2009

Cement kiln dust (CKD) is finely divided, dry particulate material captured by the kiln’s air pollution control system. About 1.4 million tonnes (1.5 million tons) of CKD was transported to landfills in 2006 in the U.S. alone. To help develop a beneficial use for this material, two CKD-based controlled low-strength material (CLSM) mixtures were optimized for fresh and hardened properties and produced using ready mixed concrete equipment. The addition of CKD was found to improve flowability and reduce segregation and bleeding. The study demonstrates that CKD-based CLSM can be used as an alternative to conventional CLSM.