纤维增强碱激发材料的物理力学和耐久性能研究

Study on the Physico-Mechanical and Durability Properties of Fiber-Reinforced Alkali Excited Materials

选择聚丙烯纤维(PP)和玄武岩纤维(BF),采用6种不同体积掺量,制备13组纤维增强碱激发材料(AAC),研究纤维种类和掺量对AAC的工作性能、抗压和抗折强度、抗裂和抗渗性能的影响,并引入纤维增强指数I对各项性能进行探讨。结果表明:相同掺量下PP在改善流动性能方面高于BF,但对抗压强度影响较低,而BF对抗折强度提升率比PP高17.3%;PP在0.5%掺量下可将抗渗等级提高2级,而BF几乎无改善效果。I可同时反映纤维掺量和物理特性,PP的I介于100和350时,其抗折性能、抗压性能均能得到进一步提升,但超过350后对各项性能均产生甚至加剧负面影响;掺加BF的AAC具有更低的阈值。

Selecting polypropylene fibers(PP)and basalt fibres(BF),a total of 13 groups of fiber reinforced alkali excited materials(AAC)were prepared by using 6 different volume dosages to study the effects of fiber dosage and fiber type on the workability,compressive and flexural strengths,cracking and seepage resistance of AAC,and the introduction of the fiber reinforcement index I was introduced for further discussion of the various properties.The results show that polypropylene fibers(PP)are higher than basalt fibers(BF)in improving flowing property at the same dosage,but have a lower effect on compressive strength,whereas BF has a higher flexural strength enhancement rate of 17.3%than PP;PP can increase the seepage resistance grade by 2 grades at a dosage of 0.5%,but BF has almost no effect on the improvement.I can reflect both the dosage of the fibers and the physical properties.When I is between 100 and 350,its flexural and compressive properties can be further improved,but after more than 350,they will have or even intensify the negative impact on all the properties;the ACC doped with BF had a lower threshold value.