Push out tests of the rock (in the forms of rods) embedded in the cement mortar have been conducted to measure the bond strength of the interfacial transition zone (ITZ) in Mode-II. Locally available granite rock which contains the medium size of Quartz, Feldspar grains have been collected from the near vicinity of Mandi (HP, India) town. Cylindrical specimens of size 18 mm in diameter have been obtained using drill machine. A modified push out test setup developed for the experiments. It observed in the trial tests that due to the roughness of the rock specimens, the contribution of the frictional stresses is very high at the ITZ. This frictional contribution has made the crack propagation difficult in Mode-II. Hence the failure is extended through the mortar phase. Different combinations have been tried and finally, an optimized push out test setup geometry has been developed. Next, the effect of the water-cement (w/c) ratios (i.e.0.25, 0.30 and 0.35) on the Mode-II strength of ITZ for the age of 7 days has been studied. It is observed that the Mode-II strength of ITZ is sensitive to the water-cement ratio. The strength has increased by 37% when the w/c ratio is reduced from 0.35 to 0.25.