Two Possible New Techniques for Determining the Early-Age Shear Strength of Shotcrete: Auger Penetrometer and Vane Shear Tester
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 3
Abstract
Shotcrete or sprayed concrete is widely used as ground support in the construction of tunnels. The early-age strength development of shotcrete is very important because it influences the determination of safe re-entry times beneath the tunnel heading. This study has examined the possible application of a handheld soil vane shear tester and a handheld auger penetrometer for testing the early-age strength of shotcrete. This is achieved by measuring the shear strength because previous research in this area indicates that the shear failure dominates the early-age resistance of shotcrete. The investigation involved testing of three techniques, which resulted in readings of both compressive and shear strengths. Shear testing involved a combination of the vane shear tester and the auger penetrometer, which obtains its readings through auger penetration and rotation. The compression testing involved the use of the Meyco needle penetrometer, which was tested on the same cast specimens as the shear tests and at the same time intervals. In this paper, the term shotcrete has been used for the special normal concrete, with a simple shotcrete mix design, used in this investigation. Strong correlations were found among the vane shear strength, auger penetrometer shear strength, Meyco penetrometer compressive strength, and time after pouring, for up to 4 h of testing. The shear strength results from the auger penetrometer and the vane shear tester are very similar, and there is almost a perfect linear correlation between the results from these two methods.
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References
Abd Elaty, M. A., and Ghazy, M. F. (2012). “Flow properties of fresh concrete by using modified geotechnical vane shear test.” HBRC J., 8(3), 159–169.
ACI (American Concrete Institute). (2005). Guide to shotcrete, Farmington Hills, MI.
ASTM. (1990). “Standard test method for compressive strength of concrete using portions of beam broken in flexure.” ASTM C116-90, West Conshohocken, PA.
ASTM. (2015). “Standard specification for admixtures for shotcrete.” ASTM C1141/C1141M, West Conshohocken, PA.
Australian Shotcrete Society. (2010). Recommended practice: Shotcreting in Australia, Concrete Institute of Australia, North Syndey, NSW, Australia.
Australian Standard. (1998). “Supplementary cementitious materials for use with portland and blended cement.” AS3582.1, Sydney, Australia.
Australian Standard. (2010a). “Concrete structures.” AS3600, Sydney, Australia.
Australian Standard. (2010b). “General purpose and blended cements.” AS3972, Sydney, Australia.
BASF Group. (2017). “Shotcrete being sprayed by workers in tunnel.” ⟨http://www.master-builders-solutions.basf.us/en-us/functions-and-applications/underground-construction⟩ (Mar. 10, 2017).
Bauer, E., Souva, J. G. G., Guimaraes, E. A., and Silva, F. G. S. (2007). “Study of the laboratory vane test on mortars.” Build. Environ., 42(1), 86–92.
Beaupré, D., and Jolin, M. (2002). “Efficiency of shotcrete accelerator: A fundamental approach.” Proc., Shotcrete for Underground Support IX Conf., Japan Tunneling Association, Tokyo.
Bernard, E. S. (2008). “Early-age load resistance of fibre reinforced shotcrete linings.” Tunnelling Underground Space Technol., 23(4), 451–460.
Bernard, E. S. (2011). “Influence of geometric factors on the punching load resistance of early-age fibre reinforced shotcrete linings.” Tunnelling Underground Space Technol., 26(4), 541–547.
Bernard, E. S., and Geltinger, C. (2007). “Early-age determination of compressive strength in shotcrete.” Shotcrete, 9(4), 22–27.
Bryne, L. (2014). “Time dependent material properties of shotcrete for hard rock tunnelling.” Ph.D. dissertation, KTH Royal Institute of Technology, Stockholm, Sweden.
Bryne, L. E., Ansell, A., and Holmgren, J. (2014). “Laboratory testing of early age bond strength of shotcrete on hard rock.” Tunnelling Underground Space Technol., 41, 113–119.
Chandler, R. J. (1988). “The in-situ measurement of the undrained shear strength of clays using the field vane.” ASTM STP1014 Vane shear strength testing in soils: Field and laboratory studies, ASTM, West Conshohocken, PA, 13–44.
Ciancio, D., and Helinski, M. (2010). “The use of shear wave velocity for assessing strength development in Fibre Reinforced Shotcrete.” Shotcrete: Elements of a system, E. S. Bernard, ed., CRC Press, Boca Raton, FL, 65–70.
Clark, C. C., Stepan, M. A., Seymour, J. B., and Martin, L. A. (2011). “Early strength performance of modern weak rock mass shotcrete mixes.” Min. Eng., 63(1), 54–59.
Clements, M. J. K. (2004). “Comparison of methods for early age strength testing of shotcrete.” Shotcrete: More engineering developments: Proc., 2nd Int. Conf. on Engineering Developments in Shotcrete, CRC Press, Boca Raton, FL, 81–87.
Diamantidis, D., and Bernard, E. S. (2004). “Reliability-based resistance design of FRS tunnel linings.” Shotcrete: More engineering developments: Proc., 2nd Int. Conf. on Engineering Developments in Shotcrete, CRC Press, Boca Raton, FL, 109–126.
Gibson, A. (2010). “Advances in shotcrete impact-echo testing.” Shotcrete: Elements of a system, E. S. Bernard, ed., CRC Press, Boca Raton, FL, 111–117.
Gibson, A., and Ciancio, D. (2013). “Early-age ultrasonic testing of concrete and shotcrete using embedded sensors.” Nondestructive testing of materials and structures, Springer, Dordrecht, Netherlands, 485–490.
Iwaki, K., Hirama, A., Mitani, K., Kaise, S., and Nakagawa, K. (2001). “A quality control method for shotcrete strength by pneumatic pin penetration test.” NDT E Int., 34(6), 395–402.
JHS (Japan Highway Public Corporation). (1994). “Method of test for initial strength of shotcrete.” JHS 702-1992, Tokyo.
Jolin, M. (1999). “Mechanisms of placement and stability of dry process shotcrete.” Ph.D. dissertation, Univ. of British Columbia, Vancouver, Canada, 152–152.
Jolin, M., Beaupré, D., and Mindess, S. (1999). “Mechanisms governing the behaviour of fresh shotcrete: Placement and stability.” Materials for buildings and structures, F. H. Whitman, ed., Vol. 6, Wiley, Hoboken, NJ, 8–17.
Karakus, M., Baillie, T. S., Cannon, O. R., Forsyth, B. F. H., and Snell, T. J. (2014). “Developing early age strength in fibre reinforced shotcrete (FRS) effects of accelerator type and rate of dosage.” ISRM Regional Symp.—EUROCK 2014, International Society for Rock Mechanics and Rock Engineering, Lisbon, Portugal, 1021–1026.
Mohajerani, A. (1982). “An auger penetrometer and its application to the compaction control of sand.” Aus. Geomech. News, 4, 22–25.
Mohajerani, A. (1985). “Auger penetration methods for the determination of density of sand fills, shear strength of clays and liquid limit.” Aus. Road Res., 15(4), 239–248.
Mohajerani, A. (1993). “Auger penetrometer development for the compaction control of sand.” Aus. Geomech., 23, 72–78.
Mohajerani, A. (1996). “A possible alternative method for the determination of the liquid limit.” Aus. Civ. Eng. Trans., 38(2–4), 65–70.
Mohajerani, A., Rodrigues, D., Ricciuti, C., and Wilson, C. (2015). “Early-age strength measurement of shotcrete.” J. Mater., 2015, 1–10.
New Zealand Geotechnical Society. (2001). Guideline for hand held shear vane test, Wellington, New Zealand.
Potvin, Y., and Nedin, P. (2004). “Controlling rock fall risks in Australian underground metal mines.” 3rd ground support in mining and underground construction, E. Viyaescusa and Y. Potvin, eds., CRC Press/A.A. Balkema, Boca Raton, FL, 359–366.
Rispin, M., Howard, D., Kleven, O. B., Garshol, K., and Gelson, J. (2009). Safer, deeper, faster: Sprayed concrete: An integral component of development mining, Australian Centre for Geomechanics, Crawley, WA, Australia, 68–81.
Sanglerat, G. (1972). “The penetrometer and soil exploration.” Interpretation of penetration diagrams—Theory and practice, National Academy of Sciences, Elevier, Amsterdam, Netherlands.
SIKA. (2017). “Shotcrete being sprayed by machine in tunnel.” ⟨http://mys.sika.com/en/concrete-redirect/sika-concrete-technology/sika-sprayed-concrete-topics/uses/lining.html⟩ (Mar. 10, 2017).
Teichert, P. (2002). “Carl Akeley: A tribute to the founder of shotcrete.” Shotcrete, 4(3), 10–12.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 3 • March 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Apr 19, 2017
Accepted: Aug 8, 2017
Published online: Dec 20, 2017
Published in print: Mar 1, 2018
Discussion open until: May 20, 2018
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