The Shear Strength Behaviour of Natural Infill
摘要
The shear strength of the infill or gouge material inside infilled joints has a serious impact on the infilled joint shear strength. Initial Barton’s study considers only the infill strength as an infilled joint strength. Things have changed since then now asperity, joint roughness, infill particle size also plays critical role in shear strength of the infill joints. This study giving proper justification in analysing the role of particle sizes of infill material in the shear strength of infill joints. Direct shear environment in in situ natural joints are simulated through plane surface Plaster of Paris joints filled with limestone infill with different grades of sizes in infill material. The choice of limestone infill is due to its strong affinity to seepage water. This study giving comparisons of shear strengths with respect to different grades of sizes of infill limestone in plane surface Plaster of Paris (POP) limestone infilled joints in constant normal load condition.