Influences of Fibers on Drying Shrinkage of Fiber-Reinforced Cementitious Composite
Publication: Journal of Engineering Mechanics
Volume 127, Issue 1
Abstract
An analytical model has been formulated for the drying shrinkage performance of a fiber-reinforced cementitious composite. The model is based on the assumption that shear stress is produced between the fiber and surrounding matrix as the matrix shrinks. This shear stress in turn influences the matrix deformation behavior resulting in macroscopic composite shrinkage lower than that of a pure cement-based matrix. Through systematic derivation, a free shrinkage expression, which reflects the influences of the matrix and fiber properties as well as fiber orientation characteristics, is presented. A parametric study, including the influence of elastic moduli of the fiber and matrix, fiber dimension, and fiber content in the case of 3D fiber distribution, is carried out. The model results indicate that shrinkage of a fiber-reinforced cement-based composite is significantly influenced by elastic moduli of fiber and matrix as well as fiber length and thickness (i.e., diameter for fiber with a circular cross section). Model predictions based on independent parametric inputs compare favorably with experimental measurements of free shrinkage of fiber-reinforced mortar and concrete.
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References
1.
Balaguru, P., and Ramakrishnan, V. ( 1988). “Properties of fiber reinforced concrete: Workability, behavior under long-term loading and air-void characteristics.” ACI Mat. J., 85(3), 189–196.
2.
Branson, D. E. ( 1977). Deformation of concrete structures, McGraw-Hill, New York.
3.
Cox, H. L. ( 1952). “The elasticity and strength of paper and other fibrous materials.” Br. J. Appl. Phys., 3, 72–79.
4.
Filho, R. D. T., and Sanjuan, M. A. ( 1999). “Effect of low modulus sisal and polypropylene fiber on the restrained shrinkage of mortars at early age.” Cement and Concrete Res., 29, 1597–1604.
5.
Hasin, Z. ( 1962). “The elastic moduli of heterogeneous material.” J. Appl. Mech., 29, 143–150.
6.
Krenchel, H. ( 1975). “Fiber spacing and specific fiber surface.” Proc., RILEM Conf. on Fiber Reinforced Cement and Concrete, A. Neville, ed., The Construction Press, U.K., 69–79.
7.
Kumar, S. V. and GangaRao, H. V. S. (1998). “Fatigue response of concrete decks reinforced with FRP rebars.”J. Struct. Engrg., ASCE, 124(1), 11–16.
8.
Li, V. C., Wang, Y., and Backer, S. ( 1991). “A micromechanical model of tension-shortening and bridging toughening of short random fiber reinforced brittle matrix composites.” J. Mech. Phys. Solids, 39(5), 607–625.
9.
Mangat, P. S., and Azari, M. M. ( 1984). “A theory for the free shrinkage of steel fiber reinforced cement matrices.” J. Mat. Sci., 19, 2183–3194.
10.
Mangat, P. S., and Azri, M. M. ( 1988). “Shrinkage of steel fiber reinforced cement composites.” Mat. and Struct., Paris, 21, 163–171.
11.
Matsui, S. ( 1997). “Technology developments for bridge decks—Innovations on durability and construction.” Kyouryou To Kiso, (8), 84–92 (in Japanese).
12.
Mosley, W. H., and Bungey, J. H. ( 1990). Reinforced concrete design, Macmillan Education Ltd.
13.
Neville, A. ( 1994). “With expensive cement?” Concrete Int., 16(9), 34.
14.
Perdikaris, P. C., and Beim, S. (1988). “R/C bridge decks under pulsating and moving load.”J. Struct. Engrg., ASCE, 114(3), 591–607.
15.
Perdikaris, P. C., Beim, S. R., and Bousias, S. N. ( 1989). “Slab continuity effect on ultimate and fatigue strength of reinforced concrete bridge deck models.” ACI Struct. J., 86(4), 483–491.
16.
Pickett, G. ( 1956). “Effect of aggregate on shrinkage of concrete and a hypothesis concerning shrinkage.” J. ACI, 27(5), 581–590.
17.
Romualdi, J. P., and Mandel, J. A. ( 1964). “Tensile strength of concrete affected by uniformly distributed and closely spaced short lengths of wire reinforcement.” J. ACI, 61, 657–670.
18.
Swamy, R. S., and Stavrides, H. ( 1979). “Influence of fiber reinforcement on restraining shrinkage and cracking.” J. ACI, 75, 443–460.
19.
Xi, Y., and Jennings, H. M. ( 1997). “Shrinkage of cement and concrete modeled by a multiscale effective homogeneous theory.” Mat. and Struct., Paris, 30, 329–339.
20.
Zhang, J., Li, V. C., and Wu, C. (2000). “Influence of reinforcing bars on the shrinkage stress in concrete slab.”J. Engrg. Mech., ASCE, 126(12), 1297–1300.
Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 127 • Issue 1 • January 2001
Pages: 37 - 44
History
Received: Mar 22, 2000
Published online: Jan 1, 2001
Published in print: Jan 2001
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