###
工程科学与技术:2014,46(1):177-182
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
聚丙烯纤维增强陶瓷模型石膏性能及机理研究
(1.重庆大学 材料科学与工程学院;2.重庆建大建材有限公司)
Study on Performance Improving and Mechanism of Model-gypsum by Polypropylene Fiber
(1.College of Materials Sci. and Eng.,Chongqing Univ.;2.Chongqing Jianda Construction Materials Co. Ltd.)
摘要
图/表
参考文献
相似文献
附件
本文已被:浏览 1717次   下载 129
投稿时间:2013-07-08    修订日期:2013-10-01
中文摘要: 系统研究了聚丙烯纤维体积掺量(Vc)及长径比(l/d)对陶瓷模型石膏工作性能、力学行为、软化系数、弯曲韧性及吸水性能的影响。研究表明:l/d≤600,Vc≤0.88kg/m3范围内石膏浆体工作性能良好,长径比、掺量增加,浆体流动性变差,凝结时间小幅缩短;石膏硬化体力学性能受纤维影响显著,长径比、掺量增大,软化系数、弯曲韧性增强;抗折强度随纤维长径比增大而降低,l/d≤600时,掺量增加,抗折强度呈抛物线变化,继续增大长径比,强度逐渐降低。最佳纤维参数为l/d=400,Vc=0.88 kg/m3。SEM及孔结构微观机理分析表明:聚丙烯纤维综合改善模型石膏性能效果显著,纤维与石膏界面结合强度及在石膏基体中的分散程度是影响纤维-石膏复合材料性能的主要因素。
Abstract:The effects of l/d and Vcof polypropylene fiber on the working performance,mechanical behavior and water absorption of model-gypsum were presented.The result showed that when the l/d≤600 and Vc≤0.88 kg/m3,fiber had little influence on the fluidity of gypsum slurry,and the setting time was slightly shortened by the increasing of Vc and l/dof fiber.The mechanical properties of fiber-gypsum composite were significantly influenced by the change of l/dand Vc.Coefficient of softness and flexural toughness grew stronger with the increase of l/d and Vc.Flexural strength decreased as parabola with the increase of l/d.The best parameter of polypropylene fiber was l/d=400 and Vc=0.88 kg/m3.SEM indicated that polypropylene takes advantages on the improvement of model-gypsum properties.The most influence factors to composite are interface bounding of fiber-gypsum and the degree of scatter of fiber in the compound.
文章编号:201300733     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(50872160)
作者简介:
引用文本:
赵敏,彭家惠,张明涛,朱登玲.聚丙烯纤维增强陶瓷模型石膏性能及机理研究[J].工程科学与技术,2014,46(1):177-182.
Zhao Min,Peng Jiahui,Zhang Mingtao,Zhu Dengling.Study on Performance Improving and Mechanism of Model-gypsum by Polypropylene Fiber[J].Advanced Engineering Sciences,2014,46(1):177-182.