• 首页
  • 期刊介绍
  • 编委会
  • 征稿启事
  • 期刊订阅
  • 相关下载
  • 联系我们
-10℃即时受冻条件下外加剂和掺和料对负温混凝土性能影响
Effects of Chemical and Mineral Admixtures on Negative Temperature Concrete in the Instant Freezing Condition of -10℃
投稿时间:2017-07-26  修订日期:2018-01-11
DOI:103969/j.issn.1007 9629201804020
中文关键词:  -10℃即时受冻  负温混凝土  化学外加剂  矿物掺和料  SK复合防冻剂
英文关键词:instant freezing condition of -10℃  minus temperature concrete  chemical admixture  mineral admixture  SK antifreeze compound
基金项目:国家重点研发计划(973计划)项目(2017YFC0405004);中国水科院青年科学研究专项(SM0145B242016,SM0145B442017);广西省自然科学基金资助项目(2016GXNSFBA380056);广西水工程材料与结构重点实验室开放课题(GXHRI WEMS 2018 5)
              
作者单位
张思佳
ZHANG Sijia
中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038
Beijing IWHRKHL Co., Ltd., China Institute of Water Recourses and Hydropower Research, Beijing 100038, China
纪国晋
JI Guojin
中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038
Beijing IWHRKHL Co., Ltd., China Institute of Water Recourses and Hydropower Research, Beijing 100038, China
陈建国
CHEN Jianguo
广西壮族自治区水利科学研究院广西水工程材料与结构重点实验室,广西南宁530023
Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning 530023, China
孔祥芝
KONG Xiangzhi
中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038
Beijing IWHRKHL Co., Ltd., China Institute of Water Recourses and Hydropower Research, Beijing 100038, China
马锋玲
MA Fengling
中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038
Beijing IWHRKHL Co., Ltd., China Institute of Water Recourses and Hydropower Research, Beijing 100038, China
摘要点击次数: 211
全文下载次数: 
中文摘要:
      在-10℃即时受冻条件下,采用SK复合防冻剂、粉煤灰、纤维素醚和硅粉配制C30F300混凝土,以研究无预养情况下,化学与矿物外加剂对负温混凝土抗压强度、耐久性能和变形性能的影响.结果表明:在-10℃即时受冻条件下,掺加SK复合防冻剂可配制满足C30F300设计等级的负温混凝土,复掺SK复合防冻剂和矿物掺和料是制备负温混凝土的关键技术.另外,借助X射线衍射(XRD)、压汞法(MIP)、扫描电子显微镜(SEM)等测试方法,对比研究了未掺与掺加SK复合防冻剂水泥净浆的水化过程,阐明了SK复合防冻剂的作用机理;从理论上探讨了SK复合防冻剂、纤维素醚和矿物掺和料对负温混凝土的作用,可以为混凝土配合比设计与施工提供技术参考.
英文摘要:
      SK antifreeze compound, fly ash, cellulose ether and silica fume were used to prepare C30F300 concrete in the instant freezing condition of -10℃. The effects of chemical and mineral admixtures on compressive strength, durability and deformation performance of negative temperature concrete were investigated when pre curing is not required. The results show that in the instant freezing condition of -10℃, SK antifreeze compound can be applied to prepare negative temperature concrete that satisfies the design requirements of C30F300 The key technology of preparing negative temperature concrete is adding SK antifreeze compound and mineral admixtures. In addition, the mechanism of SK antifreeze compound is clarified by means of X ray diffraction(XRD),mercury intrusion porosimetry(MIP) and scanning electron microscope(SEM), which are utilized to compare and observe the hydration process of cement paste with and without SK antifreeze compound. The function of SK antifreeze compound, cellulose ether and mineral admixtures in negative temperature concrete is explored theoretically, which is aimed to provide technical reference to mix design and construction.
查看全文  查看/发表评论  下载PDF阅读器
关闭