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引用本文:	李庆华,徐松杰,徐世烺,吕瑶,柯锦涛,吴宇星.采用碳纳米管提高纤维砂浆的起裂断裂韧度[J].建筑材料学报,2017,20(2):186-190

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采用碳纳米管提高纤维砂浆的起裂断裂韧度
李庆华, 徐松杰, 徐世烺, 吕瑶, 柯锦涛, 吴宇星
浙江大学高性能建筑结构与材料研究所,浙江杭州310058

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.

关键词: 碳纳米管纤维砂浆起裂断裂韧度

DOI：103969/j.issn1007 9629201702005

分类号:

基金项目:浙江省自然科学基金资助项目（LR16E080001）

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

LI Qinghua, XU Songjie, XU Shilang, L Yao, KE Jintao, WU Yuxing

Institute of Advanced Engineering Structures and Materials, Zhejiang University, Hangzhou 310058, China

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.

Key words: carbon nanotube fiber mortar initial fracture toughness