This paper investigates the mechanical and fracture properties of basalt fiber reinforced fly ash geopolymer concrete with different length (3 mm, 6 mm, 12 mm and 18 mm), which were tested by means of compressive strength test, splitting tensile strength test and three point bending test. The fiber reinforced mechanism was characterized by SEM. Simultaneously, the strain field and displacement field of FAGC were explored by using of digital image correlation. The results reveal that the addition of basalt fiber improve compressive strength, splitting tensile strength, peak load, fracture toughness and fracture energy, and all of them for fiber reinforced FAGC with 6 mm were biggest. In addition, a decrease in crack length and an improvement in relative COD increment for basalt fiber reinforced FAGC before the load level of post-80% peak load were observed.

本文研究了不同长度（3 mm，6 mm，12 mm和18 mm）的玄武岩纤维增强粉煤灰土聚合物的力学性能和断裂性能，并通过抗压强度试验，劈裂抗拉强度试验和三点试验来测试弯曲测试。用SEM表征了纤维增强机理。同时，利用数字图像相关性探索了FAGC的应变场和位移场。结果表明，玄武岩纤维的加入提高了抗压强度，劈裂抗拉强度，峰值载荷，断裂韧性和断裂能，其中6mm的纤维增强FAGC最大。此外，