Effects of temperature and confining pressure on the mode I and mode II fracture toughness of cement mortar. (December 2019)

• Record Type: Journal Article
• Authors: Ghanbari, Navid; Hosseini, Mehdi; Saghafiyazdi, Morteza
• Is Part Of: Theoretical and applied fracture mechanics. Volume 104(2019)
• Publication Date: 2019-12
• Subjects: Confining pressure -- Temperature -- Cement mortar -- Fracture toughness -- Mode I -- Mode II; Fracture mechanics -- Periodicals; 620.1126
• DOI: 10.1016/j.tafmec.2019.102361
• Languages: English
• ISSNs: 0167-8442

Abstract

Highlights: Investigating the effect of the confining pressure and the temperature on the mode I and mode II fracture toughness of cement mortar. Presenting the relationship between the mode I and mode II fracture toughness and the confining pressure for cement mortar. Presenting the relationship between the mode I and mode II fracture toughness and the temperature. Abstract: The effects of temperature and confining pressure were investigated on the mode I and mode II fracture toughnesses of Cracked Chevron-Notched Brazilian Disc (CCNBD) cement mortar specimens. The specimens were tested at ambient temperature (20 °C), as well as 60, 100 and 150 °C to study the effects of temperature. Furthermore, CCNBD cement mortar specimens were tested under 0, 3, 5, 7, and 10 MPa to investigate the effect of confining pressure on fracture toughness. Cement mortar specimens were used for testing in this study. According to the results, both mode I and mode II fracture toughnesses of the cement mortar increased linearly with increasing the confining pressure. Mode I and mode II fracture toughnesses initially increased by increasing the temperature up to 60 °C but then decreased as the temperature was elevated to the 100–150 °C range.