Limitation of space allows only for a selection of papers to be listed. Preface. Section 1: Opening. The International Ash Working Group: A Treatise on Residues from MSW Incinerators (S.E. Sawell et al.). intemational Progress in Solid Waste Management (J.H. Skinner). Life Cycle Analyses; Results of Some Case Studies (J. Cramer). Section 2: Environmental Aspects. Immobilisation Potential of Cementitious Materials (F.R Glasser). Coal Fly-Ash Leaching Behaviour and Solubility Controlling Solids (R. Garavaglia, P. Caramuscio). Modelling Ca-Solubility in MSWI Bottom Ash Leachates (R.N.J. Comans, J.A. Meima). Particle Petrogenesis and Speciation of Elements in MSW Incineration Bottom Ashes (T.T. Eighmy et al.). In-situ Utilization of Waste Bentonite Slurry (N. Uchiyama, S. Horiuchi). The Use of MWI Fly Ash in Asphalt for Road Construction (J.B.M. Hudales). Immobilization of Slag Material by Foam Bitumen (J.H. Dijkink). European Standardisation of Additions for Concrete (J.M.J.M. Bijen). Measurement of Redox Potential During Standardized Column Tests (J. Keijzer, A.J. Orbons). Role of Facilitated Transport in the Emissions of Secondary Raw Materials (J.J. Steketee et al.). Integrated Treatment of MSWI-residues: Treatment of Fly Ash in View of Metal Recovery (B. Laethem et al). Section 3: Technical Aspects. Use of Demolition Concrete to Produce Durable Structural Concrete (P.J.. Wainwright, J.C. Cabrera). Potentials for Utilisation of PFBC Ash (J. Rogbeck, P. Elander). Quantities and Qualities of Municipal Waste Incinerator Residues in the Netherlands (J.G.P. Born). Upgrading Techniques for the Quality Improvement of Municipal Waste Incineration Residues (F.J.M. Lamers, J.G.P. Born). Applications for Coal-use Residues: An intemational Overview (L.B. Clarke). Specifications and the Use of Wastes in Construction in the United Kingdom (R.J. Collins, C.J. Atkinson). Overview of Coal Ash Use in the USA (S.S. Tyson). A Concept for the Environmental Evaluation of Waste Management Benefits (A. Tukker, D.J. Gielen). Disintegration of Fly Ashes in the Rotary-vibration Mill (J. Sidor, M.A. W6jcik). Frost Susceptibility of Recycled Aggregate (M.M. O'Mahony). Use of Crushed Tile and Concrete as Filling in Pipe Trenches (J. Folkenberg). Section 4: Closing. State of the Art Report: Use of Waste Materials in Construction - Technological Development (G.R. Woolley). A Unified Approach to Leaching Behaviour of Waste Materials (T.T. Eighmy, H.A. van der Sloot).