Microstructure and hydration degree of cement paste based on CT

WU Zehong; WEI Ya

doi:10.13801/j.cnki.fhclxb.20190612.001

Volume 37 Issue 4

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WU Zehong, WEI Ya. Microstructure and hydration degree of cement paste based on CT[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 971-977. doi: 10.13801/j.cnki.fhclxb.20190612.001

Citation:

WU Zehong, WEI Ya. Microstructure and hydration degree of cement paste based on CT[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 971-977. doi: 10.13801/j.cnki.fhclxb.20190612.001

WU Zehong, WEI Ya. Microstructure and hydration degree of cement paste based on CT[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 971-977. doi: 10.13801/j.cnki.fhclxb.20190612.001

Citation:

WU Zehong, WEI Ya. Microstructure and hydration degree of cement paste based on CT[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 971-977. doi: 10.13801/j.cnki.fhclxb.20190612.001

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Microstructure and hydration degree of cement paste based on CT

doi: 10.13801/j.cnki.fhclxb.20190612.001

WU Zehong,
WEI Ya

Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China

Received Date: 2019-04-03
Publish Date: 2020-04-15

Abstract

Abstract

CT scanning tests of cement paste with water/cement ratios of 0.3 and 0.5 from 1-40 days' age were carried out. The 3D microscopic model of cement paste was successfully reconstructed, and the morphological changes of unhydrated cement particles, hydration products and pores during this period were observed. Based on the results of CT scanning, the volume fraction of unhydrated clinkers and the hydration degree were calculated. The calculated results were compared with the commonly used TGA method, and agree well with the TGA results. CT scanning could be used as a reliable method for quantifying the hydration degree of cement.
- cement paste,
- CT scanning,
- 3D reconstruction,
- TGA,
- degree of hydration
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