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UWM-CBU Concrete Materials Technology Series Program No. 49
Workshop and Field Demonstration for Use of Flowable Slurry Containing
Coal Ash, Sand, and Recyclable Products
Sponsored By
UWM Center for By-Products Utilization, Milwaukee, WI
Illinois Clean Coal Institute, Carterville, IL
Co-Sponsored By
American Coal Ash Association; Wisconsin Electric Power Company;
City of Peoria, Department of Public Works; United Ready-Mix, Inc.;
Williams Ethanol Services, Inc
August 31, 2001, Peoria, IL



Workshop Description


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, tunnels, etc.  Flowable Slurry is a low-strength concrete-like material that is made from one or more of the materials such as coal ash, wood ash, used foundry sand, post-consumer crushed glass, concrete sand, water, and some portland cement.  The strength of this material can vary from 50 psi to 1200 psi at the age of 28 days.  Flowable slurry is being specified increasingly by municipalities, state highway departments, and engineers for many applications.


The workshop will present case histories of successful installations.  It would include a demonstration of slurry production and placement.  Handout materials 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, aggregates suppliers, and contractors.  Knowledgeable professionals engaged in specifying, approving, marketing, and using flowable slurry will present state-of-the-art information.



8:00 a.m.       Registration
8:30              Welcome and Introduction
                    Dr. Ronald H. Carty, ICCI
8:45             What is flowable slurry (a.k.a. CLSM), Engineering properties and mixture proportions of flowable slurry made with coal ash, sand, used foundry sand, wood ash, crushed glass, on-site excavated materials, etc. (physical & chemical properties, strength, shrinkage, permeability, typical mixtures, etc.)
                   Tarun R. Naik
10:15            Break
10:30            Field applications of flowable slurry in backfilling of excavations, trenches, and underground voids.  Effect of mixture proportions on setting characteristics and placement, thermal and electrical resistivity properties, field performance, economy, and marketing.
                   Bruce W. Ramme
12:00             Lunch
1:00              Adjourn to the demonstration location.
1:20              Field Demonstration:  Slurry placement and hardening and settlement process; and Questions and Answers
                   Tarun R. Naik and Mike Salata
2:45              Adjourn

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      Tarun R. Naik, Ph. D., P. E.

     Director, UWM Center for By-Products Utilization, Milwaukee, Wisconsin

Dr. Naik has over 35 years of experience with cement, aggregates, and concrete. His contribution in teaching and research has been well recognized nationally and internationally.  His research has resulted in over 250 technical reports and papers in ACI, ASCE, ASTM, etc. He is a member of ACI, ASCE, ASEE, ASTM, RILEM, NSPE, and WSPE.  He is a member of technical committees of ACI, ASCE, ASTM, and RILEM.  He has served as a president of WI-ACI, WSPE, and other organizations.


     Bruce W. Ramme, P. E.

Manager, Combustion Products Utilization, Wisconsin Electric Power Company,  Milwaukee, WI 

Mr. Ramme has worked for approximately 20 years with WEPCO and is currently working towards the goal of 100% utilization of WEPCO’s coal combustion products.  He is a member of ACI, ASCE, and other professional organizations.  He is also chairman of ACI Committee 229 on CLSM, chairman of ACI 213B on By-Products Lightweight Aggregate, and a member of other technical committees of ACI.  He is also a past president of the Wisconsin Chapter of ACI.

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