Sprayed Concrete Technology

The process of spraying concrete is one of the most versatile concrete placing techniques, and is used in a wide range of applications - from construction of new tunnels, domes, tanks and pools, to repair and strengthening of existing structure. The steady growth in interest and application in the technique is reflected in this book, which brings together current international developments in materials, application, repair, specifications and testing. Sprayed Concrete Technology forms the proceedings of the International Conference organised by the American Concrete Institute and the Sprayed Concrete Association in Edinburgh, Scotland, September 1996.

Part 1: Admixtures. Powdered air-entraining admixture in dry-mix shotcrete. Properties of dry sprayed concrete containing ordinary portland cement or fly ash-portland cement. New admixtures for high performance shotcrete. Advanced experiences with high performence alkali-free non-toxic powder accelerator for all shotcrete systems. Part 2: Applications. Sprayed concrete in conjunction with electro-chemical protection of concrete. A dome for your home (or office) - innovative uses of steel fibre reinforced shotcrete. Low-cost laminated shotcrete maring structures. Recent developments in materials and methods for sprayed concrete linings in soft rock shafts and tunnels. Sprayed concrete for the strengthening of masonry arch bridges. Application of thick and heavily reinforced shotcrete. Part 3: Fibres. Evolution of strength and toughness in steel fibre reinforced shotcrete. Flexural strength modelling of steel fibre reinforced sprayed concrete. Part 4: Materials. Dry shotcrete with rapid hardening cement and humid aggregates. Poyolefin fibre reinforced wet-mix shotcrete. Sprayed fibre concrete: the way forward in civil engineering. Part 5: Repair. The repair of Gorey Jetty in the state of Jersey. Wet process sprayed concrete technology for repair. Wet sprayed mortars reinforced with flexible metallic fibres for renovation: basic requirements and full-scale experimentation. Sprayed mortar repairs to highway structures. Aesthetic flatwork rehabilitation. Sprayed concrete repairs - their structural effectiveness. Long term performance of sprayed concrete repair in highway structures. Part 6: specification. Contractual aspects of testing shotcrete and rockbolts. Shotcrete standards - an American perspective. Rehabilitation of concrete structures in Germany by sprayed concrete. Training and certification scheme for sprayed concrete nozzlemen in the UK. Part 7: Spray process. Particle kinematics in dry-mix shotcrete - reserach in progress. Fundamentals of wet-mix shotcrete. Part 8: Test methods and performance. Evaluation and testing of sprayed concrete repair materials. Evaluation of new and old technology in dry process shotcrete. Strengthening of concrete bridges using reinforced sprayed concrete. Index. Subject Index.

Simon Austin isa Professor School of Architecture, Building and Civil Engineering, Lougborough University.