WASET
	%0 Journal Article
	%A Roland Pusch and  Richard Weston
	%D 2012
	%J International Journal of Geotechnical and Geological Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 68, 2012
	%T Impact of Scale on Rock Strength
	%U https://publications.waset.org/pdf/1445
	%V 68
	%X The scale dependence of the strength of virtually homogeneous rock is usually considered to be insignificant but the spectrum of discontinuities plays a very important role for the strength of differently sized rock elements and also controls the rock creep strain. Large-scale load tests comprised recording of the creep strain rate that was found to be strongly retarded and negligible for stresses lower than about 1/3 of the failure load. For higher stresses creep took place according to a log time law representing secondary creep that ultimately changed to tertiary creep and failure.

	%P 1577 - 1582