磷酸锌改性钢纤维与水泥基界面的黏接强度试验研究

Test study on the bond strength between Zinc phosphate steel fiber and cement

钢纤维与水泥基体的界面黏接性能是保证钢纤维混凝土承载能力的关键,而钢纤维的腐蚀会影响界面强度。在钢纤维表面沉积一层磷酸锌保护膜,通过微观结构分析(SEM和EDX)、动电位极化腐蚀试验和纤维拔出试验对比分析钢纤维处理前后的变化,发现钢纤维表面的磷酸锌层不仅可以提高纤维与基体界面间的黏接强度,而且能够改善钢纤维的防腐性。

The interface bond between steel fibers and cement matrix is the key of carrying capacity of steel fiber reinforced concrete（SFRC）.In this study,we deposited zinc phosphate coating on steel fiber.By microstructure analysis （SEM and EDX）,the linear polarization test and fiber pull-out test,we found that ZnPh coatings fabricated on the carbon steel surface not only provided strong mechanical interlocking bonds between fibers and matrix,but also protected steel fiber from corrosion.