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UWM-CBU Concrete Materials Technology Series Program No. 50
Workshop and Construction Demonstration for Use of Wood Ash in
Concrete and Flowable Slurry
Sponsored By
UWM Center for By-Products Utilization, Milwaukee, WI
Wisconsin Department of Natural Resources Waste Reduction and Recycling Demonstration Grant Program
Weyerhaeuser Company, Stora Enso North America, National Council of Air and Stream Improvement  (NCASI) Wisconsin Electric Power Company, and Wisconsin Public Service Corporation
Co-Sponsored By
Wisconsin Chapter – American Concrete Institute, Wisconsin Ready-Mixed Concrete Association,
and American Society of Civil Engineers – Wisconsin Section
  September 27, 2001, Rothschild, WI

Workshop Description


The purpose of the workshop is to present important technical information and review production and construction aspects for the use of wood ash in ready-mixed concrete as well as in flowable slurry (CLSM).  Flowable Slurry is a very low-strength concrete-like material that is made from one or more of the following 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 will also include a demonstration of use of wood ash in structural concrete slab and slurry 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 concrete and flowable slurry will present state-of-the-art information.


8:00 a.m.          Registration and Continental Breakfast
8:30              Welcome and Introduction
                    Stuart A. D. McCormick
8:45                       Physical, Chemical, and Mechanical Properties of Wood Ash: Use of wood ash in ready-mixed concrete. Mixture proportions for non-air entrained and air entrained concrete, and flowable slurry with wood ash. Test results for concrete and flowable slurry with wood ash.
Tarun R. Naik
10:15            Break
10:30                     Field Applications: Flowable slurry containing industrial by-products in backfilling of excavations, trenches, and underground voids.  Effects of slurry 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                       Regulatory Perspective: Use of wood ash in concrete and flowable slurry relative to NR 538 requirements.
Michael L Miller
1:30              Adjourn to the demonstration location.
1:45                       Construction Demonstration of Structural Concrete Slab and Flowable Slurry with Wood Ash:  Placement, compaction, finishing, hardening and settlement process; and questions and answers
                    Tarun R. Naik and Bruce Sopkowicz
3:15              Adjourn

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Stuart A. D. McCormick, P. Eng., Leader of Residuals, Solid Waste, and Groundwater Specialists Network, Weyerhaeuser Company, Alberta, Canada.  Since 1989 Mr. McCormick has been a Registered Professional Engineer, and a member of Association of Professional Engineers, Geologists, and Geophysicists of Alberta.  He has made presentations to and/or authored papers for many conferences and seminars, including National Council for Air and Stream Improvement (NCASI), Solid Waste Association of North America (SWANA), and Air and Waste Management Association (A&WMA).


Michael L. Miller, Waste Management Specialist for the West Central Region, Wisconsin Department of Natural Resources, Wisconsin Rapids, Wisconsin.  Mr. Miller has worked for 23 years for the WI-DNR in the Solid Waste Program.  He is responsible for solid waste activities in Adams, Jackson, Juneau, Monroe, and Wood Counties.  He is also responsible for NR 538 activities for the entire West Central Region (18 counties).    

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 resulting in over 250 technical reports and papers in ACI, ASCE, ASTN, RILEM, ect.  He is a member of ACI, ASCE, ASEE, ASTM, RILEM, NSPE, and WSPE.  He is also a member of technical committees of ACI, ASCE, ASTM, AND RILEM.  He has served as a president of WI-ACI, WSPE and other organization.

Bruce W. Ramme, P. E., Manager, Combustion Products Utilization, Wisconsin Electric Power Company, Milwaukee, Wisconsin.  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 the chairman of ACI Committee 229 on Flowable Slurry (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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