Abstract
The effects of admixed polypropylene (PP) fibers on the drying shrinkage of hardened concrete are presented in this paper. Concrete mixtures made with Ordinary Portland cement (OPC) and OPC/Slag blended cements containing various volume fractions of PP fiber were tested. The results show small but consistently higher drying shrinkages in concretes incorporating PP fibers than that without fiber. The effect is more pronounced in slag concretes and in concretes cured for only 1 day. An attempt to explain this phenomenon was made by water loss, nitrogen adsorption, sorptivity and scanning electron microscopy tests on the same concretes. Additional moisture loss and porosity are proposed as possible reasons. The results of early-age restrained shrinkage tests on slag concretes show that PP fiber concrete had higher cracking tendency than the concrete without fiber. This was found to be due to higher shrinkage and elastic modulus of PP fiber concrete.
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References
Pardon I, Zollo RF (1990) Effect of synthetic fibres on volume stability and cracking of portland cement concrete and mortar. ACI Mater J 87(4):327–332
Qi C, Weiss WJ, Olek J (2003) Characterization of plastic shrinkage cracking in fiber-reinforced concrete using semi-automated image analysis. Concr Sci Eng 36(260):386–395
Bayasi Z, Mclntyre M (2002) Application of fibrillated polypropylene fibers for restraint of plastic shrinkage cracking in silica fume concrete. ACI Mater J 99(4):337–344
Banthia N, Gupta R (2006) Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete. Cem Concr Res 36(7):1263–1267
Naaman AE, Wongtanakitcharoen T, Hauser G (2005) Influence of different fibers on plastic shrinkage cracking of concrete. ACI Mater J 102(1):49
Kovler K, Sikuler J, Bentur A (1992) Free and restrained shrinkage of fiber reinforced concrete with low polypropylene fibre content at early age. Proceedings of the international symposium on fibre reinforced cement and concrete, p 91
Grzybowski M, Shah SP (1990) Shrinkage cracking of fiber reinforced concrete. ACI Mater J 87(2):138–148
Grzybowski M, Shah SP (1989) A model to predict cracking in fiber reinforced concrete due to restrained shrinkage. Mag Concr Res 41(148):125–135
Swamy RN, Stavrides H (1979) Influence of fiber reinforcement on restrained shrinkage and cracking. ACI J 76(3):443–460
Hossain AB, Weiss J (2004) Assessing residual stress development and stress relaxation in restrained concrete ring specimens. Cement Concr Compos 26(5):531–540
Moon JH, Weiss J (2006) Estimating residual stress in the restrained ring test under circumferential drying. Cement Concr Compos 28(5):486–496
Shah HR, Weiss J (2006) Quantifying shrinkage cracking in fiber reinforced concrete using the ring test. Mater Struct 39:887–889
Zhang J, Li VC (2001) Influence of fibers on the drying shrinkage of fiber-reinforced cementitious composite. J Eng Mech ASCE 127(1):37–44
Pigeon M, Toma G, Marchand J, Bissonnette B (2003) Experimental study of early-age restrained autogenous shrinkage. Mater Struct 36(264):666–672
Aly T, Sanjayan JG (2007) Factors contributing to early age shrinkage cracking of slag concretes subjected to 7-days moist curing. Mater Struct. Springerlink Onlinefirst doi: 10.1617/s11527-007-9269-2
Kovler K (1994) Testing system for determining the mechanical behviour of early age concrete under restrained and free uniaxial shrinkage. Mater Struct J 27(170):324–330
Zollo RF, Ilter JA (1986) Plastic and drying shrinkage in concrete containing collated fibrillated polypropylene fibers. In: Swamy RN, Wagstaffe RL, Oakley DR (eds) Development in fibre reinforced cement and concrete. Proceedings, RILEM Symposium, Sheffield
Zollo RF (1984) Collated fibrillated polypropylene fibers in FRC. SP-81, Fiber reinforced concrete—international symposium, SP-81. American Concrete Institute, Detroit, MI, pp 397–409
Rose J H (1987) The effect of cementitious blast furnace slag on chloride permeability of concrete. In: Gibson FW (ed) Corrosion, concrete, and chlorides, SP-102. American Concrete Institute, Farmington Hills, MI, pp 107–125
Toutanji H, McNeil S, Bayasi Z (1998) Chloride permeability and impact resistance of polypropylene-fiber-reinforced silica fume concrete. Cem Concr Res 28(7):961–968
ASTM C 1585-04 (2004) Standard test method for measurement of rate of absorption of water by hydraulic cement concretes. ASTM International, 4 p
Toledo Filho RD, Ghavami K, Sanjuan MA, England GL (2005) Free, restrained and drying shrinkage of cement mortar composites reinforced with vegetable fibres. Cem Concr Compos 27:537–546
Peled A, Guttman H, Bentur A (1992) Treatments of polypropylene fibres to optimize their reinforcing efficiency in cement composites. Cem Concr Compos 14(4):277–285
Scrivener KL, Nemati KM (1996) Percolation of pore space in the cement past/aggregate interfacial zone of concrete. Cem Concr Res 26(1):35–40
IUPAC (1972) Manual of symbols and terminology, appendix 2, part 1, colloid and surface chemistry. J Pure Appl Chem 31:578
Juenger MCG, Jennings HM (2002) Examining the relationship between the microstructure of calcium silicate hydrate and drying shrinkage of cement pastes. Cem Concr Res 32:289–296
Kovler K (1995) Interdependence of creep and shrinkage for concrete under tension. J Mater Civil Eng 7(2):96–101
Sun W, Chen H, Luo X, Qian H (2001) The effect of hybrid fibers and expansive agent on the shrinkage and permeability of high-performance concrete. Cem Concr Res 31:595–601
Acknowledgements
The authors gratefully acknowledge the financial support provided by the Independent Cement and Lime Pty Ltd (ICL) (Industry Partner) and the Australian Research Council (Linkage Project Grant No. LP0349121) for this research project. Assistance from David Huggett with the tests and the laboratory assistance provided by technical staff Graeme Rundle, Jeff Doddrell and Kevin Nievaart are also gratefully acknowledged.
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Aly, T., Sanjayan, J.G. & Collins, F. Effect of polypropylene fibers on shrinkage and cracking of concretes. Mater Struct 41, 1741–1753 (2008). https://doi.org/10.1617/s11527-008-9361-2
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DOI: https://doi.org/10.1617/s11527-008-9361-2