UWM Center for By-Products Utilization

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UWM-CBU Concrete Materials Technology Series Program No. 42
Workshop and Field Demonstration for Uses of Flowable Slurry Containing Coal Ash, Used Foundry Sand, and Other Recyclable Products

Sponsored By
UWM Center for By-Products Utilization
ISG Resources, Inc., Salt Lake City, UT
Wisconsin Electric Power Company, Milwaukee, WI

Co-Sponsored By
American Coal Ash Association
American Concrete Institute, Wisconsin Chapter
American Society of Civil Engineers, Southeast Branch of Wisconsin Section
Master Builders, Inc.
Mineral Solutions, Inc.
Wisconsin Ready Mixed Concrete Association

August 13, 1999
Port Washington, WI

Workshop Description

A one-day workshop on Uses of Flowable Slurry Containing Coal Ash, Used Foundry Sand, and Other Recyclable Products has been planned at the Smith Brothers Restaurant, Port Washington, WI (25 miles north of Milwaukee). The purpose of the workshop is to present important technical information and review production and construction aspects for a new type of backfill material for trenches and other excavations, as well as for filling abandoned underground pipes and tunnels. Flowable Slurry is a low-strength concrete-like material that is made from one or more of the materials such as coal ash, used foundry sand, crushed glass, wood ash, regular concrete sand, water, and some portland cement. The strength of this material can be adjusted up to 1200 psi. It is being specified increasingly by municipalities, state highway departments, and engineers for many applications.

The workshop will present case histories of successful installations both in the Milwaukee area as well as in other states. It includes a visit to a flowable slurry production facility and demonstration of slurry production, placement, and old slurry excavation. Handout material will be provided. The workshop should be of interest to those associated with building design, engineers, architects, engineering technicians, engineers working in governmental agencies, industry and private practice, engineering faculty and students, as well as ready mixed concrete producers, and contractors.

The program will include the following speakers:
* Trent A. Kohl, P.E., Project engineer, Wisconsin Electric Power Company

* Frances A. McNeal, Manager, Governmental Approvals, Master Builders, Inc.

* Michael L. Miller, Environmental Engineer, Wisconsin Department of Natural Resources

* Tarun R. Naik, Ph.D., P.E., Director, UWM Center for By-Products Utilization, UW-Milwaukee

* Bruce W. Ramme, P.E., Manager, Combustion By-Products Utilization, Wisconsin Electric Power Co.

* Samuel S. Tyson, Executive Director, American Coal Ash Association

* LaVerne Weber, General Manager, Mineral Solutions, Inc.

* Barbara Wesener, Executive Director, Wisconsin Ready Mixed Concrete Association


Workshop and Field Demonstration of Uses of Flowable Slurry
Containing Coal Ash, Used Foundry Sand, and Other Recyclable Products

8:00 a.m. Registration

8:50 Introduction. Trent A. Kohl

8:55 Engineering properties and mixture proportions of flowable slurry made with coal ash, used foundry sand, wood ash, crushed glass, on-site excavated materials, etc. (physical & chemical properties, strength, shrinkage, permeability, typical mixtures, etc.)

Tarun R. Naik

9:40 Break

10:00 Field applications for flowable slurry in backfilling of excavations, trenches, and underground voids. Effect of mixture proportions on setting characteristics and placement, thermal and electrical resistivity properties, and field performance.

Bruce W. Ramme

10:40 WRMCA's viewpoint about the flowable slurry market: challenges and opportunities.

Barbara Wesener

11:00 Technical and marketing issues related to flowable slurry.

Speaker: ISG Resources

11:20 Market potential and economic impact of flowable slurry versus compacted sand backfill.

LaVerne Weber

11:40 Practical applications of lightweight air-entrained flowable slurry.

Frances A. McNeal

12:00 Lunch

1:20 Current use and future of flowable slurry in the United States.

Samuel S. Tyson

1:40 Regulatory perspective on flowable slurry and NR538 Requirements.

Michael L. Miller

2:00 Walk over to the Port Washington Slurry Production Plant (3 blocks).

2:15 Visit to Slurry Plant; and Field Demonstration: Slurry placement, hardened slurry excavation, hardening and settlement process, etc.

Michael Burks

3:30 Adjourn

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