This study reports the development of ultra-high performance geopolymer concrete (UHPGC) and overcoming the brittleness feature of geopolymer matrix by using different steel fibers. Four straight steel fibers with different aspect ratios and two different deformed steel fibers were investigated. Flowability, compressive strength and flexural behavior including strengths and deflection, and energy absorption capacity of UHPGC, were systematically evaluated. A deformation ratio of steel fiber was introduced to quantitatively correlate the steel fiber shape and the mechanical performance. The flowability of fresh UHPGC mixtures decreased when the fiber content and length increased, as expected, and was inconspicuously influenced by fiber shape. The increase in fiber content and the decrease of fiber diameter contributed to the improvement of the mechanical strengths of UHPGC. The flexural behaviors of UHPGC improved as the fiber volume and length increased, while the compressive and first crack strengths were affected by both curing conditions and fiber dosages as well. Different from Portland cement-based composites, the corrugated fibers with a higher deformation ratio added in UHPGC, had an inferior strengthening and toughening efficiency, while for straight fibers, those longer and smaller in diameter were more preferred. Finally, based on the previous research, a new one with adjustment and simplification was proposed for that of newly-developed UHPGC, and the fitted results had higher correlation coefficients (r²).

这项研究报告了超高性能地质聚合物混凝土（UHPGC）的发展，并通过使用不同的钢纤维克服了地质聚合物基体的脆性特征。研究了四种不同长径比的直钢纤维和两种不同的变形钢纤维。系统地评估了UHPGC的流动性，抗压强度和挠曲特性（包括强度和挠度）以及能量吸收能力。引入钢纤维的变形比以定量地关联钢纤维的形状和机械性能。当纤维含量和长度增加时，新鲜的UHPGC混合物的流动性下降，正如预期的那样，并且不受纤维形状的影响。纤维含量的增加和纤维直径的减小有助于UHPGC的机械强度的提高。随纤维体积和长度的增加，UHPGC的弯曲行为得到改善，而固化条件和纤维用量也影响了抗压强度和初裂强度。与波特兰水泥基复合材料不同，在UHPGC中添加的变形率较高的波纹纤维的增强和增韧效率较差，而对于直纤维，更优选直径更长且直径较小的那些。最后，在先前研究的基础上，针对新开发的UHPGC提出了一种经过调整和简化的新方法，拟合结果具有较高的相关系数（r 随纤维体积和长度的增加，UHPGC的弯曲行为得到改善，而固化条件和纤维用量也影响了抗压强度和初裂强度。与波特兰水泥基复合材料不同，在UHPGC中添加的变形率较高的波纹纤维的增强和增韧效率较差，而对于直纤维，更优选直径更长且直径较小的那些。最后，在先前研究的基础上，针对新开发的UHPGC提出了一种经过调整和简化的新方法，拟合结果具有较高的相关系数（r 随纤维体积和长度的增加，UHPGC的弯曲行为得到改善，而固化条件和纤维用量也影响了抗压强度和初裂强度。与波特兰水泥基复合材料不同，在UHPGC中添加的变形率较高的波纹纤维的增强和增韧效率较差，而对于直纤维，更优选直径更长且直径较小的那些。最后，在先前研究的基础上，针对新开发的UHPGC提出了一种经过调整和简化的新方法，拟合结果具有较高的相关系数（r 在UHPGC中添加较高变形比的波纹纤维，其增韧和增韧效率较差，而对于直纤维，直径较长和直径较小的那些更优选。最后，在先前研究的基础上，针对新开发的UHPGC提出了一种经过调整和简化的新方法，拟合结果具有较高的相关系数（r 在UHPGC中添加较高变形比的波纹纤维，其增韧和增韧效率较差，而对于直纤维，直径较长和直径较小的那些更优选。最后，在先前研究的基础上，针对新开发的UHPGC提出了一种经过调整和简化的新方法，拟合结果具有较高的相关系数（r²）。