回收碳纤维对混凝土电热性能的影响
Effect of recycled carbon fiber on the electrothermal properties of concrete
王艳 1李文俊 2李奥阳 2孙琳琳 2郭冰冰3
作者信息
- 1. 西安建筑科技大学 材料科学与工程学院,西安 710055;西安建筑科技大学 绿色建筑全国重点实验室,西安 710055
- 2. 西安建筑科技大学 材料科学与工程学院,西安 710055
- 3. 西安建筑科技大学 土木工程学院,西安 710055;西安建筑科技大学 绿色建筑全国重点实验室,西安 710055
- 折叠
摘要
碳纤维在生产使用过程中会产生大量的废弃料,将回收碳纤维(Recycle carbon fiber,RCF)掺入混凝土中既能减少RCF对环境造成的污染,又能实现高利用价值.本文研究了回收碳纤维混凝土(Recycle carbon fiber concrete,RCFC)在不同RCF掺量下的力学性能、导电性能和电热性能.结果表明,随RCF掺量的增加,RCFC抗压强度降低,但抗折强度略有提升,而电阻率明显下降,最大降幅为 99.11％.通电一定时间后,RCFC的热传导效果显著,且升温速率随着RCF掺量、输入电压的增加而增大.当环境温度为 20℃、-10℃、-30℃时,能使RCFC产生电热性能的最小纤维掺量分别为 1.0vol％、1.5vol％、2.0vol％,所对应的最高升温速率分别是2.267℃/min、2.525℃/min和1.45℃/min.
Abstract
Carbon fiber in the production and use of the process will produce a large number of waste materials,the recycled carbon fiber(RCF)into the concrete can reduce the pollution caused by RCF to the environment,but also to achieve a high value of utilization.In this paper,the mechanical properties,electrical conductivity and electro-thermal properties of recycle carbon fiber concrete(RCFC)were investigated under different RCF mixing amounts.The results showed that with the increase of RCF dosage,the compressive strength of RCFC decreased,but the flexural strength slightly increased,while the electrical resistivity decreased significantly,with a maximum decrease of 99.11％.After a certain time of energization,the heat conduction effect of RCFC is significant,and the warming rate increases with the increase of RCF doping and input voltage.When the ambient temperature is 20℃,-10℃and-30℃,the minimum fiber doping amount that can make RCFC produce electrical and thermal per-formance is 1.0vol％,1.5vol％and 2.0vol％,respectively,and the corresponding maximum temperature rise rate is 2.267℃/min,2.525℃/min and 1.45℃/min,respectively.
关键词
回收碳纤维混凝土/力学性能/导电性能/电热性能/传热机制Key words
recycled carbon fiber concrete/mechanical property/electrically conducting properties/electro-thermal performance/heat transfer mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据