UWM Center for By-Products Utilization

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University of Wisconsin Milwaukee

UWM-CBU Concrete Materials Technology Series Program No. 56 

Workshop and Construction Demonstration for 
Use of Fibers from Paper Industry Residuals in Concrete
Sponsored By
UWM Center for By-Products Utilization, Milwaukee, WI
US-Department of Energy Agenda 2020 Program, Weyerhaeuser Company, Stora Enso North America, National Council for Air and Stream Improvement  (NCASI) We Energies, Wisconsin Public Service Corporation, County Concrete Corporation
 Co-Sponsored By
Wisconsin Chapter – American Concrete Institute, Wisconsin Ready-Mixed Concrete Association, 
American Society of Civil Engineers – Wisconsin Section
November 1, 2002, Wisconsin Rapids, WI


Workshop Description


The purpose of the workshop is to present important technical information and review production and construction aspects for the use of fibers from pulp and paper industry primary treatment residual solids in structural-grade ready-mixed concrete, as well as potentially in flowable slurry (CLSM).  Flowable Slurry is a very low-strength concrete-like material that is usually 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 the flowable slurry 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 include a demonstration of use of residual solids in a structural concrete slab and placement, as well as slabs placement from similar previous activity.  Handout materials will be provided.  The workshop should be of interest to those associated with managing environmental challenges for pulp and paper mills, as well as engineers involved in durable concrete construction and design, 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 will present state-of-the-art information.


8:00 a.m.          Registration and Continental Breakfast
8:30              Welcome and Introduction.
                    F. Andrew Gilbert, Jr., Ph.D., Division Environmental Services Manager,
Stora Enso North America, Wisconsin Rapids, WI
8:45                       Management of Paper Industry Residuals: primary treatment residuals; boiler ash; causticizing residuals; and pulping rejects.
                             William E. Thacker
10:00            Break
10:20                     Enhancing Strength and Durability of Concrete: Physical, chemical, and mechanical properties of fibers from primary treatment residual solids from pulp & paper mills and de-inking plants; use of residual solids in ready-mixed concrete; mixture proportions for non-air entrained & air entrained concrete, and flowable slurry using residual solids; and strength & durability test results.
Tarun R. Naik
12:00            Lunch
1:15              Adjourn to the construction demonstration location.
1:30                       Construction Demonstration of Structural Concrete Slab with Primary Residual Solids:  placement, compaction, finishing, setting and hardening process; and Questions and Answers
                    Tarun R. Naik and
Bob Wells, Vice President, Ready Mix Operations, County Concrete Corp.
3:15              Adjourn



Dr. F. Andrew Gilbert, Jr., Division Environmental Services Manager, Stora Enso North America, Wisconsin Rapids, WI.

Dr. Gilbert primarily provides support services in the areas of solid waste management and wastewater treatment to Stora Enso’s mills in North America.  Dr. Gilbert has had an ongoing interest in beneficial use of solid waste and has been involved in the establishment of numerous programs at Stora Enso.  He has authored and presented papers to the National Council for Air and Stream Improvement for the pulp and paper industry (NCASI) and the Technical Association of the Pulp and Paper Industry (TAPPI).  He has also worked on technical advisory committees to state regulatory agencies in the areas of solid waste management and beneficial re-use.


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, RILEM, 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.


William E. Thacker, Ph. D., Senior Research Engineer, NCASI, Kalamazoo, MI. 

At NCASI, Dr. Thacker provides environmental research and assistance to the U.S. pulp and paper industry, particularly in the areas of pollution prevention, the beneficial use of by-products, and water quality/wastewater treatment.

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