Abstract
This research introduces a laboratory creep test for measuring displacements in anchors embedded in large-scale soft rock samples (745 × 550 × 310 mm) under constant load for long periods. Here, the preliminary theoretical fundamentals that have served for the design of the equipment are detailed, together with its mechanical and geometrical characteristics, defining the test procedure. It has been tested a rock-like material composed of bentonite, cement and water, which has been geotechnically characterized by identification, strength and deformability tests. The specific manufacturing process of the test samples is also defined. Three creep tests have been carried out with durations between forty-six and seventy-five days each. An adequate interpretation of the instantaneous strain obtained in the test has been carried out, exposing two effects that must be considered: the greater ridigity on small strain and the scale effect.
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