Model Experiments on Stressed Grouted Clamps by an Expansive Agent for Offshore Construction

摘要

This paper introduces an experimental research on stressed groutedrnclamp by a new expansive agent with different percentage of content.rnThe test results of expansive pressure and the corresponding slip stressrnare revealed. It is indicated that the new expansive agent in cementrnslurry can produce large radial self-stress without reducing the bondrnstrength at the grout/steel interface. Thus it improves the slip capacityrnof clamp and is suitable for underwater repair of offshore constructions.rnMeanwhile based on two existing formulas and employing a factor ofrnexpansive pressure augmentation, an empirical formula for relationshiprnbetween expansive pressure and slip stress is proposed for guiding therndesign of grouted clamp with the new expansive agent.