Althoughmechanical bond provided by

Although
mechanical bond provided by fiber end-hooks or twists is still beneficial
in crack bridging performance, optimized UHPC matrix with
high packing density allows for enhanced performance of smooth
high strength steel fibers, typically with a length-to-diameter ratio
of 65 and a fiber diameter of 0.2 mm.

結果 (中文) 1:

虽然机械的债券提供的纤维端钩或曲折是仍然有益在裂缝桥接性能，优化与增韧矩阵高堆积密度允许实现更高性能的光滑高强度钢纤维，通常与长度直径比65 和纤维直径 0.2 毫米。

結果 (中文) 3:

虽然
机械粘结纤维端钩或曲折提供仍在裂缝桥接性能有益的
UHPC矩阵，优化
高堆积密度允许平滑
高强度钢纤维增强的性能，通常用长径比为65的
和一个0.2毫米的纤维直径。