Abstract
Reinforced soil with polymer reinforcement has been adopted in many fields. Geogrid reinforcement which is one of the polymer reinforcements is widely used for the reinforcement of embankments and retaining walls and its demand is significantly increasing. A performance test of the geogrid is necessary to evaluate its property before its installation. The most basic performance test is a tensile test at a constant strain rate. There are two types of clamps for this test, squeeze and roller types. Empirically, it is a well known fact that the tensile strength depends on the type of clamps. In this study, a series of tensile tests was conducted to evaluate the effect of clamp on the tensile strength of reinforcement at several facilities. In the result, the average of tensile strength with the roller type clamps became larger and its variability became smaller than those of the tensile strength with the squeeze type clamps.
