Experimental research on mechanical characters of anchorage interface

The anchorage mechanical properties of the interface were studied by laboratory model experiment. Anchorage interfaces of most test samples are destructed with failure during the laboratory experiment, with individual sample with concrete cleavage. During the experiment, some samples are with failure of concrete cleavage and most of them are with higher content of sand in grouting material, which indicates that sand percentage in grouting material greatly influences mechanical properties of anchorage interface and the ultimate withdrawal resistance and interface binding strength rapidly increase with the increase of sand percentage in grouting material. The experiment also shows that interface binding strength decreases with the increase of elastic modulus and compressive resistance of grouting material and interface binding strengths of samples of same length vary greatly from each other and this phenomenon is related with sand content in grouting material. These discoveries during experiment lay a foundation for further study on mechanical properties of anchorage interface.