Study on Tensile Creep Characteristics of High Strength Concrete

Abstract:

A set of concrete tensile creep testing apparatus was constructed. The tensile creep characteristics of concrete under different loading ages (1d, 3d and 7d), different water-binder ratio (0.29, 0.33 and 0.37) and different fly ash proportion (0%, 20% and 40%) were researched. The results show that tensile creep increases with increasing of water-binder ratio obviously as well as with decreasing of loading ages. The tensile creep is inhibited by addition of fly ash, and the inhibition effect increases with the increase of fly ash proportion. Free shrinkage is counteracted 42%~62% by tensile creep. The internal tension of concrete is effectively relieved so that the possibility of cracking of concrete is decreased at early ages.

• Periodical: Applied Mechanics and Materials (Volume 835)
• Pages: 535-541
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.835.535
• Online since: May 2016
• Authors: Guan Guo Liu, Guo Rong Zhang*, Yun Sheng Zhang, Lu Lu
• Keywords: Fly Ash, Loading Ages, Tensile Creep, Water-Binder Ratio

References

[1] A. Darquennes, S. Staquet and M. Delplancke-Ogletree et al. Effect of autogenous deformation on the cracking risk of slag cement concrete. Cement Concrete Comp. 33(3) (2011) 368-379.

DOI: 10.1016/j.cemconcomp.2010.12.003

[2] S.W. Yoo, S. Kwon and S.H. Jung. Analysis technique for autogenous shrinkage in high performance concrete with mineral and chemical admixtures. Constr. Build. Mater. 34(0) (2012) 1-10.

DOI: 10.1016/j.conbuildmat.2012.02.005

[3] S. Asamoto, A. Ohtsuka and Y. Kuwahara, et al. Study on effects of solar radiation and rain on shrinkage, shrinkage cracking and creep of concrete. Cement Concrete Res. 41(6) (2011) 590-601.

DOI: 10.1016/j.cemconres.2011.03.003

[4] I. Ray, Z. Gong and J.F. Davalos, et al. Shrinkage and cracking studies of high performance concrete for bridge decks. Constr. Build. Mater. 28(1) (2012) 244-254.

DOI: 10.1016/j.conbuildmat.2011.08.066

[5] X.W. Ma, C.R. Niu, R.D. Hooton, Tensile Creep of High Performance Concrete Under Restrained Condition. J. Wuhan University of Technology, 28(2) (2006) 26-41.

[6] S.A. Altoubat and D.A. Lange. Creep, shrinkage, and cracking of restrained concrete at early age. ACI Mater. J. 98(4) (2001) 323-331.

DOI: 10.14359/10401

[7] Z.P. Bazant. Prediction of concrete creep and shrinkage: past present and future. Nucl. Eng. Des. 203(1) (2001) 27-38.

[8] M. Briffaut, F. Benboudjema and J. Torrenti, et al. Concrete early age basic creep: Experiments and test of rheological modeling approaches. Constr. Build. Mater. 36 (2012) 373-380.

DOI: 10.1016/j.conbuildmat.2012.04.101

[9] L. Maia, J. Figueiras, Early-age creep deformation of a high strength self-compacting concrete. Constr. Build. Mater. 34(0) (2012) 602-610.

DOI: 10.1016/j.conbuildmat.2012.02.083

[10] V.Y. Garas, L.F. Kahn and K.E. Kurtis, Short-term tensile creep and shrinkage of ultra-high performance concrete. Cement Concrete Comp. 31(3) (2009) 147-152.

DOI: 10.1016/j.cemconcomp.2009.01.002

[11] T. Zhang and Q. Weizu. Tensile creep due to restraining stresses in high-strength concrete at early ages. Cement Concrete Res. 36(3) (2006) 584-591.

DOI: 10.1016/j.cemconres.2005.11.017

[12] Q.X. Zhao, W. Sun, E. Zheng and G.Q. Jiang. Comparison for elastic modulus of cement, ground granulated blast-furnace slag and fly ash particles. J. Chinese Ceram. Soc. 33(7) (2005) 837-841.