Over the last twenty years we have witnessed a revolution in ground stabilization in both underground and above-ground applications, thanks largely to the widespread adoption of shotcrete as a medium for support. Shotcrete technology continues to evolve and improve as its utilization increases. From relatively obscure and sporadic beginnings, it has now become central to ground stabilization in mines and tunnels throughout advanced nations in the world, and is increasingly being used in developing nations.
The reasons for this success are clear. Shotcrete offers unrivaled scope for adaptation to varying ground conditions when used for stabilization, and allows flexibility with respect to geometry when used in other applications. The absence of form work and the fact that it conforms to irregular substrates helps to reduce costs, and it can be installed very rapidly. In many situations shotcrete will prove the most economical means of stabilization or construction, and it is more durable than most alternatives. The combination of these factors has made shotcrete the material of first choice in most underground support applications and in an increasing number of above-ground applications. As utilization spreads, new and innovative approaches to construction with this material continue to arise. The engineering basis for analysis and design of shotcrete linings and structures has also improved.
This volume includes a selection of papers describing recent developments in the evolving field of shotcrete technology, written by a wide range of authors from around the world. The subjects range from mining-related ground control requirements, testing and performance characterization, and durability, to nozzleman education and accreditation requirements. The result is a reference providing a useful compendium of recent developments which should appeal to shotcrete technologists and practitioners alike.
A comparison of models for shotcrete in dynamically
loaded rock tunnels, L. Ahmed, and A. Ansell
Structural behaviour of shotcrete on irregular hard rock surfaces, A.
Ansell
Crack widths in ASTM C-1550 panels, E.S. Bernard, and G.G. Xu
Precision of the ASTM C1550 panel test and field variation in measured FRS
performance, E.S. Bernard, G.G. Xu, and N.J. Carino
Influence of the number of replicates in a batch on apparent variability in
FRC and FRS performance assessed using ASTM C1550 panels, E.S. Bernard, G.G.
Xu, and N.J. Carino
Round and square panel tests—effect of friction, Ø. Bjøntegaard
Evaluating the service life of shotcrete, L.-S. Bolduc, M. Jolin, and B.
Bissonnette
The use of shear wave velocity for assessing strength development in Fibre
Reinforced Shotcrete, D. Ciancio, and M. Helinski
Shotcrete tunnel linings with steel ribs: Stress redistribution due to
creep and shrinkage effects, T. Collotta, G. Barbieri, and M. Mapelli
Economical mix design enhancements for FRS, S.B. Duffield, U. Singh, and
E.S. Bernard
Advances in shotcrete education and nozzleman certification in America, J.-F.
Dufour, and M. Jolin
Robotic shotcrete shaft lining—a new approach, K. Ford, L. Spence, D.
McGarva, and M. Calderwood
Advances in shotcrete impact-echo testing, A. Gibson
The influence of air content on sprayed concrete quality and sprayability
in a civil tunnel, C.J. Hauck, and G. Malm Kristiansen
Shotcrete as a good looking final finish—it is possible!, M.
Hicks
Shotcrete research and practice in Sweden—development over 35 years, B.J.
Holmgren
Design and construction of a permanent shotcrete lining—The A3 Hindhead
Project, UK, T.J. Ireland, and S. Stephenson
Shotcrete with blended cement and calcium aluminate based powder
accelerator for improved durability, A. Ishida, M. Iwasaki, and A. Araki
Sprayable fire-protective layers in traffic tunnels, W.A. Kusterle
Shrinkage and durability of shotcrete, B. Lagerblad, L. Fjällberg, and
C. Vogt
The use of geotechnical photogrammetry in underground mine development, J.L.
Lett, and J. Emmi
Testing of unreinforced masonry walls seismically retrofitted with ECC
shotcrete, Y. Lin, J.M. Ingham, and D. Lawley
Sprayed concrete nozzle operator training and certification, A.
Loncaric, C. Larive, and D.R. Morgan
The use of Fibre Reinforced Shotcrete at Cadia Hill Open Pit, R.J.
Lowther
Structural Shotcrete in Western Canada, D.R. Morgan
Centrifugal placed concrete for lining horizontal pipes, culverts, and
vertical shafts, D.R. Morgan, K. Loevlie, N. Kwong, and A. Chan
Round and square panel tests—a comparative study, S.A. Myren, and Ø.
Bjøntegaard
Shotcrete application on the Boggo Road Busway driven tunnel, E.J. Nye,
and D. Alt
Use of calorimetry to select materials for shotcrete, P.J. Sandberg, and
W. Walsh
Factors to consider in using PP fibres in concrete to provide explosive
spalling resistance in the event of a fire, K. Smith, and T. Atkinson
Composite linings: ground support and waterproofing through the use of a
fully bonded membrane, C.A. Verani, and W. Aldrian
Shotcrete application and optimization at PT Freeport Indonesia’s Deep Ore
Zone mine, E. Widijanto, E. Setiawan, M. Ramirez, and D. Napitupulu
Air void structures in blended-cement wet-mix shotcrete, K.-K. Yun,
S.-Y. Choi, J.-Y. Seo, B.-S. Jung, and C.-K. Jeon
Author index
Biography
Stefan Bernard
