AN EXPERIMENTAL STUDY ON LOAD-CARRYING CAPACITY OF RC MEMBERS BY ALKALI-SILICA REACTION

Abstract

RC slab members were quarried out from an existing railway viaduct which was 24 years old after construction and damaged by ASR. For those slab members, observation of surface conditions and material strength tests were conducted. RC beam specimens were made from the RC slab members, and static shear loading tests and fatigue shear loading tests were conducted. Punching shear tests were also conducted for RC slab members. From experimental results, it was made clear that the effects of damage on the structural capacity were small, and that the static shear capacity (V_c) increased due to the damage. A possibility was shown that the design formula of fatigue shear capacity for healthy members can be used for members damaged by ASR when the increment of V_c due to damage is correctly estimated.