Abstract
Abstract The direct shear test program described in this paper determined the shear strength parameters of Portland cement grout with 0.4 and 0.5 w:c ratios. The test set-up facilitated applying different levels of normal pressure on the shear plane which led to the determination of pressure dependency of the shear strength parameters. Dilation and contraction of the samples during shear was carefully measured using a servo controlled MTS system. The peak-residual form of the shear graphs is similar to results of often obtained in pull-out tests with deformed bars and steel cables embedded in Portland cement grout. Comprehensive understanding of shear strength of cement grout can result in more effective design of fully grouted reinforcements such as grouted bolts, cables and tendons.
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