Laboratory Study on the Mechanical Properties of Polypropylene Fiber Concrete Exposed to High Temperatures

摘要

Hydraulic servo testing system was adopted to test the mechanical properties of 144 cubic concrete specimens with different content of polypropylene fiber heated after high temperatures. The mechanical properties of cubic polypropylene fiber concrete were analyzed in this paper with the influence of different fiber contents, target temperature and cooling methods. The results of experiment show that an increase in temperature produces significant changes in concrete mechanical properties. The main properties of polypropylene fiber concrete are similar to normal concrete that tend to decrease while the temperature increases. At the same temperature, compressive strength and Young's modulus of concrete specimens decrease with growing fiber content.