دپارتمان مهندسی مکانیک ایران

انجمن مهندسی مکانیک

انجمن تست های غیر مخرب

انجمن علمی مهندسی پزشکی

انجمن بیومکانیک

آموزش تعمیر تجهیزات پزشکی

آموزش تعمیرات تجهیزات پزشکی

دوره های مهندسی پزشکی

دوره های آموزشی مهندسی پزشکی

انجمن مهندسی پزشکی

آموزش تعمیر تجهیزات دندانپزشکی

آموزش بازرسی جوش

آموزش پایپینگ


             

Evolutionary trace for early hydration of cement paste using electrical resistivity method

Abstract

Setting time and early strength of cement are two key parameters to the early hydration of cementitious materials. The two indexes are qualified via traditional electrical method in the past, but several defects still remain in traditional electrical methods, electrical resistivity measurement is put forward to study the two key parameters in this paper. A relationship between setting times (including initial and final setting time) and the electrodeless resistivity has been discussed, aiming to establish a rapid testing method which could predict setting time of cementitious materials. Furthermore, electrical resistivity measurement and standard compressive strength test has been studied and the experimental results show that the cement paste matrices with higher water cement ratio present the lower electrical resistivity value. A linear relation is established between the standard compressive strength of cements at 1 d and the resistivity of the pastes at 24 h, which can demonstrate the resistivity and the standard compressive strength have a close corresponding relationship, and the resistivity curve of cement and the strength development curve has the same trend. So the standard compressive strength of cements could be predicted by electrical resistivity curve.

Keywords

  • Setting time;
  • Standard compressive strength;
  • Cementitious materials;
  • Hydration;
  • Electrical resistivity

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