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Use of CLSM Fly Ash Slurry for Underground Facilities

by Bruce W. Ramme, Wisconsin Electric Power Co, Milwaukee, United States,
Tarun R. Naik, Wisconsin Electric Power Co, Milwaukee, United States,
Henry J. Kolbeck, Wisconsin Electric Power Co, Milwaukee, United States,



Document Type: Proceeding Paper

Part of: Utilization of Industrial By-Products for Construction Materials

Abstract:

This paper presents the results of research performed in developing and using flowable fly ash slurry which falls under the classification of Controlled Low Strength Material (CLSM) as defined by ACI Committee 229 for underground facility construction and abandonment. The mix proportions for the CLSM described in this paper utilized fly ash as a primary ingredient that was produced at Wisconsin Electric's Port Washington Power Plant as a by-product of burning coal from Pennsylvania. Information is also included on the compressive strength, electrical resistivity, thermal conductivity and compatibility with plastics used in the manufacture of underground electric cable jackets and natural gas lines. The results indicate that CLSM fly ash slurry is an excellent material for backfilling trenches and filling abandoned underground facilities.

Subject Headings: Underground structures | Fly ash | Fills | Compressive strength | Cables | Underground construction | Strength of materials | United States | Wisconsin | Washington | Pennsylvania

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