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X.M. Zhou¹, W. Dong^1,2, O.G. Oladiran¹, Z.M. Wu² and G. Kastiukas¹

¹School of Engineering and Design, Brunel University, Uxbridge, Middlesex, United Kingdom
²State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, P.R. China

doi:10.4203/ccp.106.239

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X.M. Zhou, W. Dong, O.G. Oladiran, Z.M. Wu, G. Kastiukas, "Numerical and Experimental Assessment of the Effects of Specimen Size on Shrinkage Cracking of Concrete", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 239, 2014. doi:10.4203/ccp.106.239

Keywords: crack detection, cracking prediction, early-age concrete, geometry effect, restrained shrinkage, ring test..

Summary

An elliptical ring test method is proposed to replace circular ring test methods recommended by ASTM and AASHTO for faster and more reliable assessment of the cracking tendency of concrete. A numerical model is also proposed to simulate stress development and crack initiation in restrained concrete rings subject to circumferential drying. Cracking age and position of a series of circular and elliptical, thin and thick rings are obtained from numerical analyses which agree reasonably well with the experimental results. Compared with circular rings, elliptical rings with certain geometry can shorten the ring test duration. It is also found that there are multiple cracks in the elliptical rings with some cracks initiated but not propagated through the concrete ring wall. In thin rings, cracks initiate at their inner circumference and propagate towards their outer one while in thick rings cracks initiate at the outer circumference and propagate towards their inner one.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 239 Numerical and Experimental Assessment of the Effects of Specimen Size on Shrinkage Cracking of Concrete X.M. Zhou¹, W. Dong^1,2, O.G. Oladiran¹, Z.M. Wu² and G. Kastiukas¹ ¹School of Engineering and Design, Brunel University, Uxbridge, Middlesex, United Kingdom ²State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, P.R. China doi:10.4203/ccp.106.239 purchase the full-text of this paper Full Bibliographic Reference for this paper X.M. Zhou, W. Dong, O.G. Oladiran, Z.M. Wu, G. Kastiukas, "Numerical and Experimental Assessment of the Effects of Specimen Size on Shrinkage Cracking of Concrete", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 239, 2014. doi:10.4203/ccp.106.239 Keywords: crack detection, cracking prediction, early-age concrete, geometry effect, restrained shrinkage, ring test.. Summary An elliptical ring test method is proposed to replace circular ring test methods recommended by ASTM and AASHTO for faster and more reliable assessment of the cracking tendency of concrete. A numerical model is also proposed to simulate stress development and crack initiation in restrained concrete rings subject to circumferential drying. Cracking age and position of a series of circular and elliptical, thin and thick rings are obtained from numerical analyses which agree reasonably well with the experimental results. Compared with circular rings, elliptical rings with certain geometry can shorten the ring test duration. It is also found that there are multiple cracks in the elliptical rings with some cracks initiated but not propagated through the concrete ring wall. In thin rings, cracks initiate at their inner circumference and propagate towards their outer one while in thick rings cracks initiate at the outer circumference and propagate towards their inner one. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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