聚丙烯纤维对高强混凝土高温作用后氯离子渗透性的影响研究

Study on the effect of polypropylene fiber about chloride permeability of high performance concrete after high temperature

对C80高强混凝土经受100~700℃高温作用后的氯离子渗透性进行试验研究。对比未掺加聚丙烯纤维的素混凝土,以分析掺加聚丙烯纤维是否对高强混凝土高温作用后氯离子的渗透性有所影响。并得出结论：作用温度在100~200℃时,掺入聚丙烯纤维会提高高强混凝土的氯离子渗透性,作用温度在300~400℃时反之,其余温度下影响不大。

It studied the chloride permeability of C80 high performance concrete affected by high temperatures between 100-700 ℃. Comparing with the plain concrete that didn＇t mixed with polypropylene fiber,we mixed polypropylene fiber,to analyze if the mixture of polypropylene fiber have any influence on the chloride permeability of high performance concrete under high temperature,It finally draw an conclusion that the mixture of polypropylene fiber would enhance the chloride permeability when the temperature ranged from 100- 200 ℃ and had an opposite effect when the temperature ranged from 300-400 ℃,whereas had little influence under the higher temperature.