Скачать или смотреть Impact of Wet Curing on the Curling of Cement Paste from Drying Shrinkage

Did you know that wet curing of concrete slabs or pavements will cause them to curl more when they dry than other curing methods? This changes the way that pavements and slabs are constructed and designed. This is a surprising finding that has been verified with many laboratory tests and models.

This video summarizes two papers :

Hajibabaee, A., & Ley, M. T., (2015), "Impact of Wet and Sealed Curing on Curling in Cement Paste Beams from Drying Shrinkage," ACI Materials Journal, 112(1), 79-84.

Hajibabaee, A., Grasley, Z., & Ley, M. T., (2016), "Mechanisms of dimensional instability caused by differential drying in wet cured cement paste," Cement and Concrete Research, 79, 151-158.

The slides can be found at:
https://www.dropbox.com/s/xdpdw50bm5r...

The times and sections of the video:
00:56 ACI Paper
01:15 Introduction
04:08 Variations in previous findings
05:36 Experimental setup
06:38 Mass loss results
07:32 Curling results
09:00 Change in pore sizes
09:30 Wet cured vs sealed cured
12:06 0.42 vs 0.34 w/cm
13:53 CCR Paper
14:17 Discussion of mechanisms
17:46 Degree of saturation experiments
19:38 Analytical models
21:49 Experimental vs analytical results
22:57 Linear vs nonlinear results
24:22 Effective pore pressure versus depth
26:04 What does this mean?
27:36 Conclusion