纤维表面处理对碳纤维水泥基复合材料功能特性的影响  

Effect of fiber surface treatment on functional properties of carbon fiber reinforced concrete

作　　者：姜翠香[1] 

机构地区：[1]武汉科技大学理学院,湖北武汉430065

出　　处：《混凝土》2011年第9期90-92,共3页Concrete

基　　金：武汉科技大学绿色制造与节能减排科技研究中心研究项目(B0925);武汉科技大学冶金工业过程系统科学湖北省重点实验室(C201002);湖北省教育厅科技研究项目(B20081104);国家自然科学基金重点项目(50238040)

摘　　要：通过单丝拔出微观力学试验研究了纤维表面处理对碳纤维水泥基复合材料功能响应的影响。未经表面处理的碳纤维表面惰性大,与基体的结合强度低,容易脱黏,界面韧性和稳定性差,以脱黏破坏为主的界面结构变化,使试样电阻上升较快;碳纤维经过表面处理后,其与基体的结合强度提高,纤维拔出过程中试样电阻的变化平缓,显示了随着界面黏结强度及界面韧性的提高,由界面弹塑性变形而引起界面电阻变化的成分更大。电阻变化率曲线斜率反映了电阻变化的灵敏度,纤维表面处理后,由界面结构变化引起材料电阻变化的灵敏度在一定程度上有所降低。Single fiber testing was carried out to study the effect of fiber surface treatment on mechano-electric properties between carbon fiber carbon fiber is deficient in the chemical groups on the surface.The surface of the fiber is inactive.The Varder Waal force between fiber and cement matrix is a dominant force.The bonding strength is low and interfacial debonding is easy.The reliability and repeatability of the sensing ability is low.Surface treatment of the carbon fiber improves both the interfacial bonding strength and the interfacial ductility.The interfacial stability is improved through surface treat of the carbon fiber.The superior interracial mechanical properties can help improve the strain-sensing ability relates to the better reliability.The change in resistance is more smoothly.But the gage factor decreases at some extent.

关 键 词：碳纤维 水泥 功能响应 表面处理 

分 类 号：TU528.041[建筑科学—建筑技术科学]