The mechanical properties of lightweight (volcanic pumice) concrete containing fibers with exposure to high temperatures

Abstract Fire is considered one of the main risks leading to building collapse. Lightweight concrete comprises a variety components, each which has distinct behavior under effect temperature change. A total 16 mixtures were investigated in this article. reference mix comprising simply ordinary Portland cement and ten mixes having varying percentages fine coarse lightweight aggregates (pumice), replaced gravel sand by pumice 20, 40, 60, 80, 100%, respectively. In addition, study focused on effects adding fibers aggregate mixtures. Polypropylene fibers, carbon steel employed as fiber additions. The binary mixture had higher density than remaining containing substitute. six addition after exposure temperatures 100, 250, 350 450°C for 2 h then cooled two ways (water air) well examined directly results showed that better compared other mixtures, especially at high temperature. If left cool air, volcanic can recover its compression strength being exposed temperatures.