Determination of c and phi from IDT and unconfined compression testing and numerical analysis

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Determination of c and phi from IDT and unconfined compression testing and numerical analysis

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/213639

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Title: Determination of c and phi from IDT and unconfined compression testing and numerical analysis
Author(s): Piratheepan, J.; Gnanendran, C. T.; Arulrajah, Arul
Abstract: This paper presents an alternative criterion (simplified method) to determine the cohesion (c) and internal angle of friction (Φ) properties for two granular materials lightly stabilised with slag-lime and general blend (GB) cement-flyash using indirect diametral tensile (IDT) strength and unconfined compressive strength (UCS). The c and Φ values of the stabilised materials obtained based on this criterion were related to the IDT strength and UCS. The results suggest that the c and Φ can be estimated using this criterion and the c can be accurately related to either the IDT strength or UCS for lightly cementitiously stabilised granular materials. However, the IDT strength is a better characteristic than the UCS to estimate the c. In order to validate the criterion, the c and Φ obtained from the proposed criterion were input in the numerical analyses of IDT testing with Mohr — Coulomb failure criterion using FLAC2D finite difference software. The predicted tensile stress — horizontal diametrical deformation numerical results were compared with the corresponding experimental results. Based on this numerical analysis, it was found that the c and Φ parameters estimated from this method predicted the experimental results well in the elastic region but over predicted the ultimate stress.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
Source: Journal of Materials in Civil Engineering, Vol. 24, no. 9 (Sep 2012), pp. 1153-1164
Publication year: 2012
FOR Code(s): 0905 Civil Engineering; 0912 Materials Engineering
Keyword(s): Cohesion; GB cement flyash; IDT test; Stabilised materials; Unconfined compression test
Publisher: American Society of Civil Engineers
ISSN: 0899-1561
Publisher URL: http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0000493
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