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http://dx.doi.org/10.4334/IJCSM.2008.2.1.063

Early Age Properties of HPC Columns under Construction-Site Conditions  

Yun, Ying-Wei (Dept. of Civil Engineering, Luoyang Institute of Science and Technology)
Jang, Il-Young (Civil and Environmental Engineering Dept., Kumoh National Institute of Technology)
Publication Information
International Journal of Concrete Structures and Materials / v.2, no.1, 2008 , pp. 63-68 More about this Journal
Abstract
High performance concrete (HPC) is widely used in civil engineering due to its high durability and low permeability etc. Compared with ordinary concrete, HPC may develop much higher AS (autogenous shrinkage) at early age due to the relative low water cement (w/c) ratio and adding of mineral admixtures, which is one of the main reasons for early age micro-cracking of HPC structures. This paper studies the early age property of HPC columns under similar construction-site surroundings by embedded strain transducers. Results show that for HPC structure, early-age autogenous shrinkage especially within the first day after concrete pouring is pretty large. AS within the first day are 60% larger than those for 14 days in this research for all specimens. Therefore it should be taken into account for structure durability. By comparison of PHPC (plain HPC column) and RHPC (reinforced HPC column) specimens, the effects of reinforced bars on AS and temperature distribution have been analyzed. Also the influence of w/c ratio on AS is demonstrated.
Keywords
HPC; autogenous shrinkage; embedded strain gauge; temperature distribution;
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  • Reference
1 Glisic, B. and Simon, N., "Monitoring of Concrete at Very Early Age Using Stiff SOFO Sensors," Cement & Concrete Composites, Vol. 22, No. 2, 2000, pp. 115-119   DOI   ScienceOn
2 Wong, A. C. L. et al., "Simultaneous Measurement of Shrinkage and Temperature of Reactive Powder Concrete at Early-Age Using Fiber Bragg Grating Sensors," Cement & Con. Composite, doi: 10.1016/j.cemconcomp. 2007.02.003, 2007
3 Davis, H. E, "Autogenous Volume Change of Concrete," Proceeding of the 43rd Annual American Society for Testing Materials, Atlantic City, ASTM, 1940, pp. 1103-1113
4 Zhang, M. H., Tam, C. T., and Leow, M. P., "Effect of Water-to-Cementitous Materials Ratio and Silica Fume on the Autogenous Shrinkage of Concrete," Cement and Concrete Research, Vol. 33, No. 10, 2003, pp. 1687-1694   DOI   ScienceOn
5 Nawa, Toyoharu and Horita, Tomoaki, "Autogenous Shrinkage of High-Performance Concrete," Proc. Of the international Workshop on Microstructure and Durability to Predict Service Life of Concrete Structures, Sapporo, Japan, FEB, 2004
6 Saje, Drago and Saje, Franc, "Autogenous Shrinkage Development in HPC," Bridge Materials, 2001, pp. 11-20
7 Tazawa, E. and Miyazawa, S., "Autogenous Shrinkage of Concrete and Its Importance in Concrete Technology," Z. P. Bazant, L. Carol (Eds.), Creep and Shrinkage of Concrete, Proceedings of the 5th International RILEM Symposium, E & FN Spon, London, 1993, pp. 159-168
8 Aitcin, P. C., Neville, A. M., and Acker, P., "Integrated View of Shrinkage Deformation," Concrete International, Vol. 19, No. 9, Sept. 1997, pp. 35-41
9 Yun, Ying Wei and Zhang, Guang Jun, et al., "Experimental Study on Early Age Property of High Performance Concrete by FBG Strain Sensor," Concrete Journal of China, No. 5, 2008, pp. 124-127
10 Aictin, P. C., Autogenous Shrinkage of Concrete, Edited by Tazawa, E., E & FN Spon, 1999, pp. 257-268
11 Jang, Il-Young, et al., "The Short-Term Property Monitoring for HPC Columns by Embedded FBG Sensor," Annual Report of Institute of Industrial Technology Kumoh National of Technology, Vol. 22, 2007, pp. 31-42
12 Yang, Yang, Sato, Ryoichi, and Kawai, Kenji, "Autogenous Shrinkage of High Strength Concrete Containing Silica Fume under Drying at Early Ages," Cement and Concrete Research, Vol. 35, No. 3, 2005, pp. 449-456   DOI   ScienceOn
13 Neville, A. M., Properties of Concrete, 4th Edition, Longman, London, 1995, pp. 16-17