Determining the Contact Angle of Hardened Cement Paste Using Thin Layer Wicking Method

Abstract:

Contact angle is a very important parameter to investigate the function mechanism of chemical admixtures as well as the capillary stress resulted from self-desiccation or drying. However, in most of the studies, it is only assumed to be 0 degrees. This paper studied the contact angle of hardened cement paste using thin wicking method. A serious of study was conducted on the influence of layer preparation, pre-contacting method, cement paste powder size, and suspension concentration on the measuring results. An optimized thin layer wicking method was proposed for determining the contact angle of hardened cement paste, which improves effectively the linear correlation of the penetration distance - time curve and satisfies the prerequisite of Washburn function.

• Periodical: Key Engineering Materials (Volume 539)
• Pages: 184-188
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.539.184
• Online since: January 2013
• Authors: Qian Tian, Hang Zhang, Yu Jiang Wang, Fei Guo, Ting Yao, Ji Ping Liu
• Keywords: Cement Paste, Contact Angle (CA), Superplasticizer, Thin Layer Wicking Method

References

[1] E. Chibowski. Adv. Colloid Interface Sci. Vol.98 (2002), P. 245-264.

[2] E.W. Washburn. Phys. Rev. Phys. Rev. Vol. 17(1921), P. 273-283.

[3] P.M. Costanzo, W. Wu, R.F. Giese and C.J. van. Langmuir. Vol.11(1996), P.1827-1830.

[4] A. Daniel, J. Norris. Controlled Release. Vol. 59(1999), P. 173–185.

[5] E. Chibowski and F. Gonzdez. Langmuir. Vol. 9(1993), P. 330-340.

[6] E. Chibowski and R. Perea-Carpio. J. Colloid Interface Sci. Vol. 240(2001), P. 473–479.

[7] C. Karagüzel. J. Colloid Interface Sci. Vol. 285(2005), P. 192–200.

[8] H. Chu and Z.G. Cui: Journal of Southern Yangtze Universtity(Natural Science Edition). Vol. 4 (2005), P.302-305.