Characterization of physio-chemical processes and hydration kinetics in concretes containing supplementary cementitious materials using electrical property measurements
Characterization of physio-chemical processes and hydration kinetics in concretes containing supplementary cementitious materials using electrical property measurements
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DOI：
10.1016/j.cemconres.2013.03.008
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发表时间：
2013-08
影响因子：
11.4
通讯作者：
W. McCarter;T. Chrisp;G. Starrs;A. Adamson;P. Basheer;S. Nanukuttan;S. Srinivasan;C. Green
中科院分区：
文献类型：
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作者：
W. McCarter;T. Chrisp;G. Starrs;A. Adamson;P. Basheer;S. Nanukuttan;S. Srinivasan;C. Green
目前的研究监测短期和长期的水化特性的混凝土使用离散电导率测量从初始计量，通过设置和硬化，后者包括固化和后固化期。特别是，注意力集中在近表面混凝土，因为它是保护钢材免受外部环境影响的区域，并对耐久性，性能和使用寿命产生重大影响。广泛的混凝土混合物进行了研究，包括平原波特兰水泥混凝土和混凝土含有粉煤灰和地面粒化高炉矿渣。参数归一化电导率被用来确定四个不同的阶段在水化过程中，并突出的影响，补充胶凝材料（SCM）的水化和水化动力学。已经提出了一种关系来解释10天水合后电导率的暂时降低。提出的测试程序和方法适合于钢筋混凝土结构的现场监测。
The current study monitors both the short- and long-term hydration characteristics of concrete using discretized conductivity measurements from initial gauging, through setting and hardening, the latter comprising both the curing and post-curing periods. In particular, attention is directed to the near-surface concrete as it is this zone which protects the steel from the external environment and has a major influence on durability, performance and service-life. A wide range of concrete mixes is studied comprising both plain Portland cement concretes and concretes containing fly-ash and ground granulated blast furnace slag. The parameter normalised conductivity was used to identify four distinct stages in the hydration process and highlight the influence of supplementary cementitious materials (SCM) on hydration and hydration kinetics. A relationship has been presented to account for the temporal decrease in conductivity, post 10-days hydration. The testing procedure and methodology presented lend itself to in-situ monitoring of reinforced concrete structures.