Abstract
The structure of cohesive frictional materials changes significantly with increasing the amount of binder. When the binder content is low, the binder exists only between the particle contacts (contact bound structure) whereas at higher binder content, the cohesion-less particles float (dispersed) in a matrix of binder. The structure of the material significantly affects the initiation and progression of failure, i.e. the collapse or failure mechanism. In this study, we perform a series of experiments on cohesive frictional material with contact bound structure to investigate its failure mechanism and effect of dimensional scaling. In order to investigate the effect of scaling, two sets of studies are performed, system (specimen) size effect and particle size effect on glass beads-epoxy, sand-epoxy, and sand-cement specimens. For understanding the system size effect, the specimen dimension is varied while keeping the particle size, density and binder content constant. We observe that with increase in the size of specimen, the strength of the material also increases. Similarly, effect of particle size is investigated by varying the particle size and keeping the specimen dimension, density and binder content constant. We observe that with increase in particle size, the strength of specimen reduces. We perform a set of computed tomography study on this contact bound structure to correlate the structure of the specimen with the observed scaling response.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Clough, G.W., Sitar, N., Bachus, R.C., Rad, N.S.: Cemented sands under static loading. J Geotech. Geoenviron. Eng. 107, 799–817 (1981)
James, K.M., Kenichi, S.: Fundamentals of Soil Behavior. University of California/Wiley, Berkeley/Hoboken (1976)
O’Rourke, T.D., Crespo, E.: Geotechnical properties of cemented volcanic soil. J. Geotech. Eng. 114, 1126–1147 (1988)
Santamarina, J.C., Klein, A., Fam, M.A.: Soils and waves: particulate materials behavior, characterization and process monitoring. J. Soil. Sediment. 1, 130–130 (2001)
Sowers, G.B., Sowers, G.F.: Introductory Soil Mechanics and Foundations. The Macmillan Company, New York (1961)
Fogal, T., Kruger, J.: Tuvok, an architecture for large scale volume rendering. In: Proceedings of the 15th International Workshop on Vision, Modeling, and Visualization. http://www.sci.utah.edu/~tfogal/academic/tuvok/Fogal-Tuvok.pdf (2010)
Adeyeri, J.B.: Technology and Practice in Geotechnical Engineering. IGI Global, Hershey (2014)
Weibull, W.: A statistical distribution function of wide applicability. J. Appl. Mech. Fairfield 18, 293–297 (1951)
Bazant, Z.P., Xi, Y., Reid, S.G.: Statistical size effect in quasi-brittle structures: I. Is Weibull theory applicable? J. Eng. Mech. 117, 2609–2622 (1991)
Singh, S., Kandasami, R.K., Mahendran, R.K., Murthy, T.G.: System size effects on the mechanical response of cohesive-frictional granular ensembles. In: EPJ Web Conference, vol. 140 (2017)
Kandasami, R.K., Murthy, T.: Experimental studies on the mechanics of cohesive frictional granular media. AIP Conf. Proc. 1542, 987–990 (2013)
ASTM: D5102-09 standard test method for unconfined compressive strength of compacted soil-lime mixtures. American Society for Testing and Materials (2009)
Bazant, Z.P.: Size effect on structural strength: a review. Arch. Appl. Mech. 69, 703–725 (1999)
Brown, E., Nasto, A., Athanassiadis, A.G., Jaeger, H.M.: Strain stiffening in random packings of entangled granular chains. Phys. Rev. Lett. 108, 108302 (2012)
Singh, S., Miers, J.C., Saldana, C.J., Murthy, T.G.: Fabric and structure of cohesive frictional granular ensembles. Under preparation (2018)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Switzerland AG
About this paper
Cite this paper
Singh, S., Miers, J.C., Saldana, C.J., Murthy, T.G. (2018). Experiments Show a Second Length Scale in Weakly Cohered Granular Materials. In: Giovine, P., Mariano, P., Mortara, G. (eds) Micro to MACRO Mathematical Modelling in Soil Mechanics. Trends in Mathematics. Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-99474-1_32
Download citation
DOI: https://doi.org/10.1007/978-3-319-99474-1_32
Published:
Publisher Name: Birkhäuser, Cham
Print ISBN: 978-3-319-99473-4
Online ISBN: 978-3-319-99474-1
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)