Controlled Low-Strength Material (CLSM) is a self-compacted cementitious material used primarily as a substitute for compacted backfill. The material is known by many names including flowable fill, controlled density fill, unshrinkable fill, and soil-cement slurry. The American Concrete Institute defines CLSM as a material with a maximum unconfined compressive strength of 1200 psi. For most applications, however, the compressive strength of CLSM does not exceed about 300 psi. This makes it possible for the material to be removed should future excavation be necessary. In 1992 a technical session on CLSM was held during the Transportation Research Board's annual meeting in Washington, D.C. Following these sessions, papers were solicited from each of the speakers. The papers contained in this volume are a result of that solicitation. They are as follows: Low-Strength Concrete and Controlled Low-Strength Material (CLSM) Produced with Class F Fly Ash, T.R. Naik and B.W. Ramme; Optimization of Flowable Fill Mix Proportions, M.E. Ayers, S.Z. Wong, and W. Zaman; Durability Factors Affecting CLSM, W.E. Brewer; Freezing and Thawing Durability and Early Set and Strength Development of CLSM, T.E. Nantung and C.F. Scholer; Flowable Backfill for Pipeline Bedding at the Denver International Airport, D.A. Clem, K.D. Hansen, and J.B. Kowalsky; and Soil-Cement Slurry Pipe Embedment, A.K. Howard.

  • Corporate Authors:

    American Concrete Institute

    P.O. Box 19150, Redford Station, 22400 Seven Mile Road
    Detroit, MI  United States  48219
  • Publication Date: 1994


  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 119 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00668906
  • Record Type: Publication
  • Report/Paper Numbers: ACI SP-150
  • Files: TRIS
  • Created Date: Nov 2 1994 12:00AM