耐碱玻璃纤维混凝土的长期力学性能研究

Research of the long-term mechanical properties of alkali resistant glass fiber concrete

为了研究耐碱玻璃纤维混凝土的长期力学性能,设计了5种水胶比的耐碱玻璃纤维混凝土,测试了不同龄期耐碱玻璃纤维混凝土的抗压强度、劈拉强度以及抗折强度,分析了混凝土的拉压比与泊松比的变化规律。结果表明:与基准混凝土相比,耐碱玻璃纤维混凝土的劈拉强度和抗折强度提高幅度较大,但是抗压强度提高并不显著;耐碱玻璃纤维更有利于低水胶比混凝土长期抗压、劈拉强度的增长;耐碱玻璃纤维提高了混凝土的拉压比和泊松比,增强了混凝土的韧性,改善了混凝土的脆性性能。

In order to study the long-term mechanical properties of alkali resistant glass fiber concrete, it design the mix proportion un- der five different water binder ratio to study compressive strength, splitting tensile strength and flexural strength, analyzing the tension and compression ratio and poisson＇ s ratio of concrete.The results show that compared with the reference concrete, alkali resistant glass fiber concrete increased splitting tensile strength and flexural strength largely while compressive strength increased unconspicuously.Alkali re- sistant glass fiber is more advantageous to low water binder ratio concrete＇s compressive strength and splitting tensile strength over a long period of growth.Alkali resistant glass fiber increased the tension and compression ratio and poisson＇ s ratio of concrete, enhanced the toughness of concrete, improved the brittleness of concrete performance.