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Uniaxial Compressive Strength and Elastic Modulus of Artificial Low-Cemented Geomaterials
Low-cemented geomaterials are challenging materials which cause serious problems for engineers in their proper characterization. Typical forms of such formations are clast-supported conglomerates, fault breccias, coarse-grained alluviums and colluviums, and cemented rockfill as mine backfill. Due to the complexity of obtaining undisturbed samples of these formations, fabrication of artificial specimens becomes an efficient approach to investigate their representative mechanical properties. In this paper, artificial low-cemented specimens using a mixture of rock blocks and a cement agent were prepared in the laboratory. A servo-control compression machine was utilized to investigate the effect of rock block proportions (RBP) and cement contents on the mechanical behavior of artificially low-cemented geomaterials. The results showed that cement contents and rock block proportions had a significant effect on uniaxial compressive strength (UCS), elastic modulus and also post-peak response of specimens. The results were evaluated by regression analysis. Some correlations were found between UCS and elastic modulus with respect to the RBP of specimens. Using these equations to predict the UCS and elastic modulus can be an efficient tool to overcome the difficulty of obtaining undisturbed samples of such heterogeneous materials.
Uniaxial Compressive Strength and Elastic Modulus of Artificial Low-Cemented Geomaterials
Low-cemented geomaterials are challenging materials which cause serious problems for engineers in their proper characterization. Typical forms of such formations are clast-supported conglomerates, fault breccias, coarse-grained alluviums and colluviums, and cemented rockfill as mine backfill. Due to the complexity of obtaining undisturbed samples of these formations, fabrication of artificial specimens becomes an efficient approach to investigate their representative mechanical properties. In this paper, artificial low-cemented specimens using a mixture of rock blocks and a cement agent were prepared in the laboratory. A servo-control compression machine was utilized to investigate the effect of rock block proportions (RBP) and cement contents on the mechanical behavior of artificially low-cemented geomaterials. The results showed that cement contents and rock block proportions had a significant effect on uniaxial compressive strength (UCS), elastic modulus and also post-peak response of specimens. The results were evaluated by regression analysis. Some correlations were found between UCS and elastic modulus with respect to the RBP of specimens. Using these equations to predict the UCS and elastic modulus can be an efficient tool to overcome the difficulty of obtaining undisturbed samples of such heterogeneous materials.
Uniaxial Compressive Strength and Elastic Modulus of Artificial Low-Cemented Geomaterials
Afifipour, Mohammad (author) / Moarefvand, Parviz (author)
Geo-Shanghai 2014 ; 2014 ; Shanghai, China
2014-05-05
Conference paper
Electronic Resource
English
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