Journal of the Japan Society of Engineering Geology
Online ISSN : 1884-0973
Print ISSN : 0286-7737
ISSN-L : 0286-7737
Original Article
A Fundamental Study on the Applicability of Rebound Hardness Test by Equotip for Conglomerate
Naoto UCHIDAYoshitake ETOUTakashi OOKAWAKouji IKUSADA
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2009 Volume 50 Issue 2 Pages 79-88

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Abstract
 The mechanical properties of conglomerate are strongly dominated by mechanical properties of gravel and matrix.
 If a conglomerate consists of multiple types of gravel and matrices, quantitave studies with high accuracy on the mechanical properties of those components are highly important for evaluation of mechanical properties of the conglomerate.
 In order to contribute to rational evaluation of mechanical properties of conglomerate, applicability of the equotip is studied in this paper. First, by testing multiple types of rocks, it is clarified that rebound hardness is applicable for gross estimation of unconfined compressive strength of the rock. And the applicable range of rebound hardness is suggested.
 Next, by using artificial material for the specimen, quantitave evaluation is executed for the influence of properties of rocks such as size and hardness upon the rebound hardness.
 Finally, it is confirmed that rebound hardness is applicable for engineering grouping and rock mass classification of conglomerate which is composed of multiple types of gravel and matrices.
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© 2009 Japan Society of Engineering Geology
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