New Testing Procedure for Shrinkage Cracking of Fiber-Reinforced Shotcrete
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 3
Abstract
Plain shotcrete and fiber-reinforced shotcrete (FRS) are commonly employed to produce layers or linings with large surface/volume ratios. Restrained shrinkage cracking is hence an important concern from both structural and durability aspects. In this investigation, a new testing procedure is adopted to study the shrinkage cracking behavior for plain shotcrete and four different types of FRS (polypropylene, steel, polyvinylalcohol, and hybrid). To introduce shrinkage restraint, specimens cut from a shotcrete panel are bonded to a steel fixture. By measuring the shrinkage strain of the restrained specimen at different times, the occurrence of cracking can be easily observed from a sudden “jump” in the strain values. To find the actual strain induced on the restrained specimen, unrestrained members were also monitored to obtain the free shrinkage. For various plain and reinforced shotcrete mixes, the induced strain when cracking occurs is found to follow an order that is generally consistent with physical intuition.
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Acknowledgments
Financial support of the work by the Hong Kong Research Grant Council, under CERG UST6225/00E, as well as the assistance of Gammon Skanska in preparing the shotcrete specimens, are gratefully acknowledged.
References
Asad, M., Baluch, M. H., and Al-Gadhib, A. H. (1997). “Drying shrinkage stresses in concrete patch repair systems.” Noise Vib. Control Worldw., 49(181), 283–293.
Balaguru, P. N., and Shah, S. P. (1992). Fibre reinforced cement composites, McGraw-Hill, New York.
Banthia, N., Trottier, J. F., Beaupre, D., and Wood, D. (1994). “Properties of steel fiber reinforced shotcrete.” Can. J. Civ. Eng., 21, 546–575.
Banthia, N., and Yan, C. (1997). “Shrinkage cracking in polyolefin fiber-reinforced concrete.” ACI Mater. J., 94, 492–499.
Banthia, N., Yan, C., and Mindess, S. (1996). “Restrained shrinkage cracking in fiber reinforced concrete: A novel test technique.” Cem. Concr. Res., 26(1), 9–14.
Dahl, P. A. (1985). “Plastic shrinkage and cracking tendency of mortar and concrete containing fiber mesh.” Rep. No. STF65A85039, SINTEF Div. FCB, Trondheim, Norway.
Grzybowski, M., and Shah, S. P. (1990). “Shrinkage cracking of fiber reinforced concrete.” ACI Mater. J., 87(2), 138–148.
Gupta, P., Banthia, N., and Yan, C. (2000).“Fiber reinforced wet-mix shotcrete under impact.” J. Mater. Civ. Eng., 12(1), 81–90.
Lai, T. K. (2002). “Effects of fiber addition on various properties of shotcrete and concrete.” MPhil thesis, Dept. of Civil engineering, Hong Kong Univ. of Science and Technology, Hong Kong.
Neville, A. M. (1995). Properties of concrete, 4th Ed., Longman, London.
Pihlajavaara, S. E., and Pihlman, E. (1978). “Results of long-term deformation tests of glass fiber reinforced concrete.” NORDFORSK-FRC Project No. 1974-76, Delrapport, Technical Report Center of Finland, Otaniemi, Finland.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 3 • March 2007
Pages: 214 - 218
Copyright
© 2007 ASCE.
History
Received: Nov 10, 2003
Accepted: Dec 28, 2004
Published online: Mar 1, 2007
Published in print: Mar 2007
Notes
Note. Associate Editor: John S. Propovics
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