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首页> 外文会议>National Academic Symposium on Testing and Evaluation of Building Materials >An Experimental Study of Water in Pore System of Hardened Cement Paste by Magnetic Resonance
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An Experimental Study of Water in Pore System of Hardened Cement Paste by Magnetic Resonance

机译：磁共振耐盐水泥膏孔隙系统水实验研究

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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，水与水泥比（W / C）的水和不同固化方法的水分布。横向松弛时间T_2用作描述在孔中受约束的水相的参数。结果表明，早期糊状物的T_2分布是双峰分布。随着固化时间的增加，T_2分布峰值逐渐移位到反映平均孔尺寸的减小的短T_2值以及由凝胶产品产生的比表面积的增加。此外，初始水与水泥比和固化方法的影响主要是在早期发生的。固化为28天时，各种样品中的水分布差异是不合理的。

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