Multiscale Prediction of Creep Property of Cementitious Materials

Wei, Ya; Liang, Siming; Kong, Weikang

doi:10.1007/978-981-19-6883-9_10

Cited by 1 publication

(3 citation statements)

References 64 publications

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“…It was interesting to note that fewer acoustic events were noted in the case of high strength concrete (HSC) compared to plain concrete, but the mean width of the crack was wider [15]. This indicates rapid failure since more elastic strain energy is converted to surface crack energy without any additional load(sustained load case) [1,17,18].…”

Section: Literature Reviewmentioning

confidence: 99%

“…With the help of two key parameters ( C and τ ), one can understand the creep behaviour of the material. Creep Modulus contains the long term logarithmic creep rate information [18,22,37,38]. Creep modulus is inversely related to magnitude of creep.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Additionally the presence of capillary water in specimens considerably increases the short-term creep contribution [28]. Drop in RH cause rise in capillary suction in the capillary pores which result in internal friction of CSH sheets reducing its sliding capacity inturn affecting long term creep [18,26]. For any given age at loading, the mean values of the contact creep modulus, C, reduces with increase in silicafume content.…”

Section: Creepmentioning

confidence: 99%

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Study On Interaction Between Fracture And Creep Of UHSC Using Microindentation Technique

Shankar,

M.B.,

Sasmal

2023

Proceedings of the 11th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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The interaction between fracture and creep in cementitious materials can be interpreted as the cracking that occurs during sustained loading and the effect this cracking has on subsequent change of creep. This study aims at examining creep-fracture interaction in UHSC cement paste mixes (w/b = 0.20) with varying levels of silica fume (SF) replacement (0%, 20%, and 40%) for the two different holding periods (5s and 180s) at different ages (3d, 7d, 28d, 90d) using microindentation technique. This preliminary results of a detailed experimental investigations revealed that longer dwelling time (180s) under sustained load led to decrease in fracture toughness (K c ), indicating progressive internal microcracking. This microcracking cause relaxation of stress at one site and overstressing at other site. This stress imbalance due to microcracking, influence the long-term creep rate thereby establishing an interaction between creep and fracture.

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Section: Literature Reviewmentioning

confidence: 99%