研究了不同纤维参数对偏高岭土基地质聚合物开裂性能的影响,采用裂缝宽度和裂缝面积两个性能指标分析研究了纤维种类、纤维复掺、纤维掺量、纤维长径比、纤维截面形状对偏高岭土基地质聚合物开裂性能的影响。研究表明:碳纤维的抗裂性能优于耐碱玻璃纤维、矿物纤维和聚丙烯纤维;耐碱玻璃纤维与矿物纤维的复掺性能优于其他两组复掺;聚丙烯纤维的抗裂性能随掺量的增大而逐渐提升,在掺量大于体积比为0.15%时,抗裂性能增幅较缓;长度为18mm的聚丙烯纤维优于12mm和6mm的纤维;截面形状为三叶形的聚丙烯纤维抗裂性能优于截面形状为三角形和圆形的纤维。 The influence of different fiber parameters on the cracking behavior of metakaolin-based geopolymer was studied. Two kinds of performance indexes of crack width and crack area were analyzed to study the effects of fiber type, fiber doping, fiber content, fiber aspect ratio, fiber cross-section shape Influence of metakaolin - based geopolymer cracking behavior. The results show that the crack resistance of carbon fiber is better than that of alkali-resistant glass fiber, mineral fiber and polypropylene fiber. The complex doping property of alkali-resistant glass fiber and mineral fiber is better than the other two groups. The crack resistance of polypropylene fiber The amount of increase and gradually increased, when the content is greater than 0.15% by volume, the crack resistance increases more slowly; length of 18mm polypropylene fibers better than 12mm and 6mm fibers; cross-sectional shape of trilobal polypropylene Fiber crack resistance is better than the cross-sectional shape of the triangle and circular fibers.