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An Experimental Study of Water in Pore System of Hardened Cement Paste by Magnetic Resonance

机译：硬化水泥浆孔系统中水的磁共振实验研究

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摘要

The water distribution in hardened cement paste with different ages, water to cement ratio (w/c) and different cured methods were investigated by low field NMR. The transverse relaxation time, T_2, was used as a parameter to describe the water phase constrained in pores. The results show that the T_2 distributions of pastes in the early age are bimodal distribution. As the curing time increase, the T_2 distribution peaks shift gradually to the short T_2 values reflecting the decrease of mean pore dimension as well as the increase of specific surface area resulted from the gel products. In addition, the influences of initial water to cement ratio and cure methods on water distribution are occurred mainly during the early age. When cured to 28 days, the differences of water distribution in various samples are unconspicuous.
机译：通过低场NMR研究了不同年龄，水灰比（w / c）和不同固化方法的硬化水泥浆中的水分布。横向弛豫时间T_2被用作描述约束在孔隙中的水相的参数。结果表明，早期糊状物的T_2分布为双峰分布。随着固化时间的增加，T_2分布峰逐渐移至较短的T_2值，这反映了平均孔径的减小以及凝胶产物导致的比表面积的增加。此外，初始水灰比和固化方法对水分布的影响主要发生在早期。固化至28天后，各种样品中水分布的差异不明显。

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  • 来源
  • 会议地点 Shanghai(CN)
  • 作者

    Anming She; Wu Yao; Wancheng Yuan;

  • 作者单位

    Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 201804, China;

    Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 201804, China;

    State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cement paste; Water; NMR; Relaxation time;

    机译：水泥浆水; NMR;休息时间;

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