Effect of humidity and porosity on fracture of hardened Portland cement

From National Research Council Canada

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DOI	Resolve DOI: https://doi.org/10.1016/0008-8846(82)90033-3
Author	Search for: Beaudoin, J. J.¹
Affiliation	National Research Council of Canada
Format	Text, Article
Subject	Concrete; Portland cement; breakage; relative humidity; porosity; hydration; HCP; drying history effects; meniscus effects; aging; moisture assisted-stress corrosion processes
Abstract	The dependence of fracture mechanics terms (gamma[T], K[c], G[c] and J[c]) on relative humidity and porosity is determined for hardened Portland cement paste (HCP). The cardinal features of the fracture term/humidity curves and fracture term/porosity curves are discussed. Large hysteresis in fracture term/relative humidity curves is observed, the magnitude depending on the drying history of HCP. Meniscus effects, aging and moisture-assisted stress corrosion processes are thought to contribute to fracture of HCP. Unhydrated Portland cement, Ca(OH)[2] particles, and pores with specific size distributions in the HCP system possibly act as crack arrestors.
Publication date	1982-11-01
In	Cement and Concrete Research 12, no. November 6 (1 November 1982): 705–716.
Language	English
Peer reviewed	Yes
Identifier	DBR-P-1057
NRC number	NRCC 20677 NRC-IRC-3777
NPARC number	20375754
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Record identifier	0214f5d1-ceac-4ca0-baf7-df077e048dde
Record created	2012-07-23
Record modified	2024-03-22

Date modified:: 2024-07-08