Definition: self-consolidating cementitious mixture that is intended to result in a compressive strength of 1200 psi (8.3 MPa) or less.- ACI Concrete Terminology

A controlled low-strength material (CLSM) is a self-consolidating, cementing material used primarily as a backfill as an alternative to compacted fill. Many terms have been used to describe this material, including flowable fill, unshrinkable fill, controlled density fill, flowable mortar, plastic soil-cement, and soil-cement slurry; however, the correct terminology is controlled low-strength material.

Practice oriented papers and articles ON CLSM

A More Sustainable Unshrinkable Fill

Publication: Concrete International
Date: 9/1/2014

CLSM Containing Cement Kiln Dust

Publication: Concrete International
Date: 6/1/2009

Physical Properties of CLSM Using High Volumes of Incineration Ash from Sewage Sludge

Publication: Special Publication
Date: 4/1/2007

Compressive Strength and Leachate Characteristics of New Green CLSM with Eco-Cement and Melted Slag from Municipal Solid Waste

Publication: Special Publication
Date: 5/1/2004

Properties of Flowable Slurry Containing Wood Ash

Publication: Special Publication
Date: 3/1/2004

Improved Capping Methods for CLSM Cylinders

Publication: Concrete International
Date: 11/1/2003

Optimization of CLSM Mix Proportion with Combination of Clinker Ash and Fly Ash

Publication: Special Publication
Date: 6/1/2001

Durability of CLSM with Used Foundry Sand, Bottom Ash, and Fly Ash in Cold Regions

Publication: Special Publication
Date: 6/1/2001

Use of Glass and Fly Ash in Manufacture of Controlled low Strength Materials

Publication: Special Publication
Date: 6/1/2001

Use of Pond Ash in CLSM

Publication: Concrete International
Date: 12/1/1998

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