钢-无机纤维对轻骨料混凝土力学性能及耐久性能的影响

Effect of steel inorganic fiber on mechanical properties and durability of lightweight aggregate concrete

为了研究钢-无机纤维对轻骨料混凝土力学性能和耐久性能的影响,设计不同掺量的单掺陶瓷纤维和玄武岩纤维以及不同掺杂方式的混杂钢-玄武岩纤维和钢-陶瓷纤维增强轻骨料混凝土试件。结果表明,钢-玄武岩纤维对轻骨料混凝土抗压强度和60d透水时水压强度提高最明显,最大增幅分别达14.5%、42.9%;掺入1.35kg/m^(3)玄武岩纤维对抗折强度增幅为62.2%;掺入陶瓷纤维降低了抗压强度和抗渗性能,但提高了抗折强度及抗冻性能;钢-陶瓷纤维对抗渗性能和抗冻性能提升效果较好。

In order to study the effect of steel-inorganic fibers on the mechanical properties and durability of lightweight aggregate concrete,single ceramic fibers and basalt fibers,and hybrid steel-basalt fibers and steel-ceramic fibers reinforced lightweight aggregate concrete with different fiber contents are designed.The results show that steel-basalt fibers increase the compressive strength and water pressure strength at 60-day permeability with the most significant 3 improvement of 14.5%and 42.9%.The addition of 1.35kg/m^(3) basalt fibers increases the flexural strength by 62.2%.Ceramic fibers have adverse effect on the compressive strength and impermeability,but improve the flexural strength and frost resistance.Steel-ceramic fibers have a better effect on improving the impermeability and frost resistance of lightweight aggregate concrete.