کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1457116 | 989242 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Comparison between two ultrasonic methods in their ability to monitor the setting process of cement pastes Comparison between two ultrasonic methods in their ability to monitor the setting process of cement pastes](/preview/png/1457116.png)
This paper presents the comparison between ultrasonic wave transmission (USWT) method and ultrasonic wave reflection (USWR) method in their ability to monitor the setting process of cement pastes. The velocity of ultrasonic longitudinal waves and shear wave reflection coefficient were measured simultaneously on cement pastes with different hydration kinetics. Even though both methods are able to reliably monitor the hydration process and formation of structure of an arbitrary cement paste, they monitor the setting process in different ways. The relationship between the velocity of longitudinal waves and shear wave reflection coefficient can be simplified into three characteristic phases and the end of the first phase can be used to define the beginning of the setting process of cement paste.
Journal: Cement and Concrete Research - Volume 39, Issue 10, October 2009, Pages 876–882