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Improving performance of recycled aggregate concrete with superfine pozzolanic powders
  • ISSN号:2095-2899
  • 期刊名称:Journal of Central South University
  • 时间:2013.12.1
  • 页码:3715-3722
  • 分类:TU528.59[建筑科学—建筑技术科学] TQ172.715[化学工程—水泥工业;化学工程—硅酸盐工业]
  • 作者机构:[1] Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China, [2] School of Planning, Architecture and Civil Engineering, Queen', s University, Belfast BT9 5AG, UK
  • 相关基金:Project(51178417) supported by the National Natural Science Foundation of China; Project(2012R10025) supported by the Qianjiang Talent Plan of Zhejiang Province, China; Project(2012HY006B) supported by the Marine Cross-Guide Research Funds of Zhejiang University, China; Project(2013FZA4015) supported by the Fundamental Research Funds for the Central Universities, China; Project supported by the Department of Construction of Zhejiang Province, China
  • 相关项目:荷载作用下砼宏细观损伤演变对渗透性能劣化的影响机制
中文摘要:

磷的炉渣(PHS ) ,扎根的成粒的强风炉子炉渣(GGBS ) 和苍蝇灰(FA ) 被用作波特兰水泥的代替修改再循环的总数水泥的微观结构(皇家装甲兵) 。命名 W3T4 被建议改进在再循环的总数和臼之间的界面的转变地区(ITZ ) 的表演的一个新生产方法。机械性质和耐久性皇家装甲兵被测试,它证明这个新生产方法改进性质皇家装甲兵,并且有最好的尺寸的 GGBS 做大贡献到表演皇家装甲兵由于它的更好充满的效果和早得多的凝硬性的反应。与 GGBS 结合了,设置时间的延迟上的 PHS 的效果能被减轻, synergistic 效果帮助皇家装甲兵做一个更多的协议。为有 25% 再循环的总数(RA ) 的 RAC, 10% GGBS 添加剂,在 25.4% 的压缩力量增加,而是关于参考水泥的在 64.3% 的渗透减少与自然做了的代替和 10%PHS + 聚集。这些改进的微观机构被扫描电子显微镜(SEM ) 调查。SEM 图象证明新生产方法,增加的特级的凝硬性的粉末和超级可塑剂的好处,做稠密得多的 ITZ 在皇家装甲兵。

英文摘要:

Phosphorous slag (PHS), ground granulated blast-furnace slag (GGBS) and fly ash (FA) were used as replacements of Portland cement to modify the microstruc~xe of recycled aggregate concrete (RAC). A new manufacturing method named "W3T4" was proposed to improve the performances of interracial transition zone (ITZ) between recycled aggregate and mortar. The mechanical properties and the durability of RAC were tested, which show that this new manufacturing method improves the properties of RAC, and the GGBS with finest size makes a great contribution to the performance of RAC due to its better filling effect and much earlier pozzolanic reaction. Combined with GGBS, the effects of PHS on the retardation of setting time can be alleviated and the synergistic effect helps to make a more compact RAC. For the RAC with 25% of the recycled aggregate (RA) replacement and 10% PHS + 10% GGBS additives, the compressive strength increases by 25.4%, but the permeability decreases by 64.3% with respect to the reference concrete made with nature aggregates. The micro-mechanisms of these improvements were investigated by the scanning electron microscope (SEM). The SEM images show that the new manufacturing method, adding superfine pozzolanic powders and super-plasticizer benefits, makes a much denser ITZ in RAC.

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期刊信息
  • 《中南大学学报:英文版》
  • 主管单位:教育部
  • 主办单位:中南大学
  • 主编:黄伯云
  • 地址:湖南长沙中南大学校本部
  • 邮编:410083
  • 邮箱:jcsu@csu.edu.cn
  • 电话:0731-88836963
  • 国际标准刊号:ISSN:2095-2899
  • 国内统一刊号:ISSN:43-1516/TB
  • 邮发代号:42-316
  • 获奖情况:
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  • 被引量:334