采用碳纳米管提高纤维砂浆的起裂断裂韧度

Improvement of the Initial Fracture Toughness of Fiber Mortar by Carbon Nanotubes

摘要:

将01%(质量分数)碳纳米管掺加到微钢纤维PVA纤维增强水泥砂浆中，以提高其起裂断裂韧度.结果显示：与空白试件相比，在28d龄期时，掺加01%碳纳米管的微钢纤维PVA纤维增强水泥砂浆弹性模量和起裂断裂韧度分别提升了905%和2144%；碳纳米管主要通过桥连作用、网格填充作用增强微钢纤维PVA纤维增强水泥砂浆的起裂断裂韧度.

Abstract:

A new method to improve the initial fracture toughness of steel fiber(ST) PVA mortar by adding 01%(by mass) carbon nanotubes was presented. Compared with the blank control group, elastic modulus and initial fracture toughness of fiber mortar by carbon nanotubes are enhanced by 905% and 2144% after 28 days, respectively. The mechanism for using carbon nanotubes as a reinforcement in mortar is mainly based on its bridging and mesh filling effects.