院报 ›› 2019, Vol. 36 ›› Issue (7): 149-152.DOI: 10.11988/ckyyb.20171297

• 水工结构与材料 • 上一篇    下一篇

硅粉对混凝土绝热温升的影响

陈嘉健1, NGP-L(吴沛林)2, 关宪章3   

  1. 1. 佛山科学技术学院 土木工程系,广东 佛山 528000 ;
    2.维尔纽斯皇家科技大学 土木工程学院,立陶宛 维尔纽斯LT-10223;
    3.港合丰建筑科技有限公司,香港 999077
  • 收稿日期:2017-11-10 出版日期:2019-07-01 发布日期:2019-07-18
  • 作者简介:陈嘉健(1985-),男,广东佛山人,副教授,博士,主要从事混凝土材料及混凝土结构研究。E-mail:chenjiajian@fosu.edu.cn
  • 基金资助:
    广东省绿色建材与装配式建筑工程技术研究中心开放基金项目(ZCZX201803);欧盟Marie Sktodowska-Curie Actions项目 (751461);佛山市科技计划项目 (2016AB000031)

Effect of Microsilica on Adiabatic Temperature Rise of Concrete

CHEN Jia-jian1, NG Pui-Lam2, GUAN Xian-zhang Garfield3   

  1. 1.Department of Civil Engineering, Foshan University, Foshan 528000, China;
    2.Faculty of Civil Engineering, Vilnius Gediminas Technical University, Vilnius LT-10223,Lithuania;
    3.ConHubForm Construction Technology Co., Ltd., Hong Kong 999077, China
  • Received:2017-11-10 Online:2019-07-01 Published:2019-07-18

摘要: 为探讨硅粉对混凝土绝热温升的影响,配制了15组不同水胶比、不同硅粉掺量的硅粉混凝土配比试样作半绝热温升值测量,并通过热补偿法获得绝热温升值。结果表明:硅粉能降低混凝土绝热温升量,其中掺5%硅粉降低绝热温升值1.8~7.3 ℃,掺10%硅粉降低绝热温升值3.3~10.2 ℃,绝热温升降低程度受水胶比的影响;硅粉能在要求相同强度情况下显著降低混凝土绝热温升值。基于硅粉混凝土绝热温升值结果,通过回归分析获得绝热温升值预测式,并绘制了硅粉混凝土绝热温升值设计图,可供从事混凝土温度控制的技术人员参考。

关键词: 大体积混凝土, 硅粉, 绝热温升, 热量补偿, 水胶比

Abstract: Microsilica is able to improve the strength and durability of concrete, but the effect of microsilica on adiabatic temperature rise of concrete is unclear. Researchers had even obtained contradictory findings. In this study, 15 concrete samples mixed with microsilica of varied content at different water-binder ratios were produced for semi-adiabatic temperature rise experimental measurement, and then the adiabatic temperature rise of each concrete sample was calculated with the heat loss compensation technique. Results demonstrated that the addition of microsilica could suppress the adiabatic temperature rise at the same water-binder ratio and the same strength. The adiabatic temperature rise amounted to 1.8~7.3 ℃ in the presence of 5% microsilica, and 3.3~10.2 ℃ in the presence of 10% microsilica. The suppression of adiabatic temperature rise was affected by water-binder ratio. On the basis of the result of adiabatic temperature rise, the predication formula and design chart for predicting adiabatic temperature rise of microsilica concrete were presented.

Key words: mass concrete, microsilica, adiabatic temperature rise, heat loss compensation, water-binder ratio

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