Influence of Specimen Size/Geometry on Shrinkage Cracking of Rings

Weiss, Jason; Yang, Wenyu; Shah, Surendra P.

doi:10.1061/(asce)0733-9399(2000)126:1(93)

Cited by 85 publications

(55 citation statements)

References 25 publications

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“…Ouyang and Shah proposed an expression of the R curve for ring geometry by approximating the ring with a edge-notched plate subjected to uniform tensile stress. This R curve was used successfully to simulate the cracking age of thin concrete rings ͑Shah et al 1998; Weiss et al 2000͒. However, in our study, the thickness of the ring L = R 2 − R 1 is not small compared to its mean radius ͑R 2 + R 1 ͒ / 2.…”

Section: Calculation Of Cracking Age Of Concrete Ringmentioning

confidence: 74%

See 1 more Smart Citation

Cracking Tendency of Self-Compacting Concrete Subjected to Restrained Shrinkage: Experimental Study and Modeling

Turcry

Loukili

Haidar

et al. 2006

J. Mater. Civ. Eng.

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This paper presents a study on cracking risk due to shrinkage of self-compacting concrete ͑SCC͒. Cracking of SCC was investigated through a comparison of material properties, such as shrinkage, modulus of elasticity, creep, and fracture parameters, between SCC mixtures and ordinary concrete ͑OC͒ mixtures. Restrained shrinkage tests ͑ring tests͒ were also performed on the same mixtures. Numerical simulations were then used to assess the correlation between material properties and results of restrained shrinkage tests. SCC and OC were found to have equivalent shrinkage cracking tendency, provided that compressive strength is kept the same and that SCC has adequate segregation resistance.

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Section: Calculation Of Cracking Age Of Concrete Ringmentioning

confidence: 74%

“…Several models of the ring test are available in the literature ͑Kovler et al 1993; Weiss et al 2000;See et al 2003͒. In this study, the model developed by Weiss et al ͑2000͒ was chosen and adapted.…”

Section: Modeling Of Restrained Shrinkagementioning

confidence: 99%

Cracking Tendency of Self-Compacting Concrete Subjected to Restrained Shrinkage: Experimental Study and Modeling

Turcry

Loukili

Haidar

et al. 2006

J. Mater. Civ. Eng.

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“…Sometimes a visible crack may not even be generated in concrete rings [5,6]. Although AASHTO and ASTM recommended standard dimensions of circular ring specimens, other circular ring geometries [3,4,[6][7][8][9][10] have been used in various studies. Alternatively, novel elliptical ring geometries were adopted to replace circular ring geometries [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effects of specimen size on assessment of shrinkage cracking of concrete via elliptical rings: Thin vs. thick

Dong

Zhou

et al. 2016

Computers & Structures

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a b s t r a c tAn elliptical ring test method is proposed to replace the circular ring test recommended by ASTM and AASHTO for faster and more reliable assessment of cracking tendency of concrete. Numerical models are also established to simulate stress development and crack initiation/propagation in restrained concrete rings. Cracking age, position and propagation in various rings are obtained from numerical analyses that agree well with experimental results. Elliptical thin rings of certain geometry can shorten the ring test duration as desirable. In thin rings, crack initiation is caused by external restraint effect so that a crack occurs at the inner circumference and propagates towards the outer one. In thick rings, crack initiation is mainly due to the self-restraint effect so that a crack occurs at the outer circumference and propagates towards their inner one. Therefore, thick elliptical concrete rings do not necessarily crack earlier than circular ones as observed from experiment.

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“…The circular ring test method has been used by various researchers for investigating cracking potential of concrete or other cement-based materials under restrained conditions (Bentur & Kovler, 2003). So far, these researches have been basically concentrated on three fields, namely, the effects of concrete mixture compositions (Li, Qi, Li, & Ma, 1999;Mokarem, Weyers, & Lane, 2005;Passuello, Moriconi, & Shah, 2009;See, Attiogbe, & Miltenberger, 2003;Tongaroonsri & Tangtermsirikul, 2009;Turcry, Loukili, Haidar, Pijaudier-Cabot, & Belarbi, 2006), moisture gradients, and drying conditions (Branch, Rawling, Hannant, & Mulheron, 2002;Hossain & Weiss, 2004Moon, Rajabipour, Pease, & Weiss, 2006;Weiss & Shah, 2002;Weiss, Yang, & Shah, 2000) and ring size and geometry (Hossain & Weiss, 2006; In both standards, strain gages are used to measure strain of the central restraining steel core to provide a more accurate assessment of cracking age as compared to simple visual observation of the time-tofirst-cracking, which is useful but maybe less reliable than strain monitoring. In practice, the circular ring test is also widely used to determine the effects of material variations on cracking potential of concrete mixtures as well as on induced tensile stress in restrained concrete.…”

Section: Introductionmentioning

confidence: 99%

On Utilization of Elliptical Rings in Assessing Cracking Tendency of Concrete

Zhou¹,

Oladiran²,

Dong³

2014

Proceedings of the 4th International Conference on the Durability of Concrete Structures

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A new experimental method by utilizing elliptical rings to replace circular rings recommended by ASTM and AASHTO was explored for assessing cracking potential of concrete and other cement-based materials under restrained condition. A series of thin and thick elliptical concrete rings were tested alongside circular ones until cracking. Cracking age, position, and propagation were carefully examined. It is found that thin elliptical rings with appropriate geometry can initiate cracks quicker than circular ones, which is desirable for accelerating the ring test. However, thick elliptical rings seem not to exhibit a desirable geometry effect of accelerating ring test compared with circular ones. There were multiple visible cracks that occurred in an elliptical ring and some cracks were initiated but did not propagate through the ring wall. In comparison, there was only one crack in the circular rings. Finally, the features of multiple cracks in restrained elliptical rings were examined and their impact on interpreting elliptical ring test results was elaborated.

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Influence of Specimen Size/Geometry on Shrinkage Cracking of Rings

Cited by 85 publications

References 25 publications

Cracking Tendency of Self-Compacting Concrete Subjected to Restrained Shrinkage: Experimental Study and Modeling

Cracking Tendency of Self-Compacting Concrete Subjected to Restrained Shrinkage: Experimental Study and Modeling

Effects of specimen size on assessment of shrinkage cracking of concrete via elliptical rings: Thin vs. thick

On Utilization of Elliptical Rings in Assessing Cracking Tendency of Concrete

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