A new failure criterion was presented to predict the ultimate strength of shale under the triaxial and polyaxial state of stress. A database containing 93 datasets was obtained from the results of the uniaxial, triaxial, polyaxial compressive tests, an indirect tensile test was collected from reliable references, and this test was carried out on the shale samples taken from the southwestern oil...

Abstract The strength of soil can significantly increase by stabilisation with binders. Adding binders in correct proportions to improve parameters is paramount importance for earthworks. In this article, we presented a framework explore characteristics stabilised several and evaluated using applied geophysical methods estimated P-wave velocities. core our work systematic assessment the effects...

This study was carried out on granitic rocks from the Biga Peninsula in order to investigate petrographic, and mineralogical properties comparison with mechanical strength properties. conducted four different locations where outcrop north south Peninsula: Lapseki (Şevketiye granite), Ezine (Kestanbol Bayramiç (Yassıbağ Edremit (Eybek granite). Field observations detailed petrographic studies of...

having observed the costly failures of different cutoff walls, that had been constructed according to the mix design specified by reputable consultants in iran, a research programme was conducted to study the effects of constituent materials on the properties of plastic concrete. the main properties, such as compressive strength, biaxial and triaxial strains, permeability, and modulus of elasti...

As important research for drilling engineering, the prediction of oil and gas shaft lining conditions is changing from traditional method based on mechanism model to intelligent combining with data model. Therefore, this paper establishes a stacking integrated predicting uniaxial compression strength (UCS) rock four basic parameters that can reflect characteristics mass. At same time, expectati...

The present study aims to obtain the tensile properties of early age concrete based on a uniaxial tension test employing RC slender members. First, the paper shows that concrete strain is equal to the strain of rebar at the mid-span of the RC member. The tensile Young's modulus and the strain capacity of early age concrete are estimated using strain measurements. The experiment indicated that t...

Introduction: Understanding the impact process of ice-silicate mixtures is of importance, because water ices exist mostly in a variety of forms of mixtures with silicate or some other components (e.g. ammonia) in the solar system. Decrease of crater volume with increasing silicate content was observed in our previous impact cratering experiments of ice-silicate mixture targets performed using a...

The cemented backfill (CB) utilizing coal gangue (CG) and fly ash (FA) is widely applied in mines. However, the bleeding shrinkage of CB leads to insufficient contact with surrounding rock, which not beneficial for controlling roof subsidence even stope stability. Herein, a foam (CFB) formulation demonstrated, employing hydrogen dioxide (H2O2) as chemical foaming agent. cement FA show noticeabl...