TY - GEN
T1 - Experimental determination of early age fracture toughness and fracture process zone size in cement pastes
AU - Hoover, C.
PY - 2013
Y1 - 2013
N2 - The micro-scratch test and its analysis continue to grow in the fields of material science and engineering, particularly as it relates to materials at smaller scales being used for fracture resistance. In this study, white cement paste specimens were cast, extracted and their hydration was stopped at desired curing ages. A Rockwell probe was used to scratch the surface of the specimens to determine the fracture toughness at that age. Classical Brazilian split-cylinder tests were also performed to compliment the scratch tests. The excellent convergence of the raw data allows the increase of fracture toughness and splitting strength over time to be determined. Finally, Irwin's characteristic length, which is proportional to the fracture process zone size, is determined and shown to asymptotically reach a constant size.
AB - The micro-scratch test and its analysis continue to grow in the fields of material science and engineering, particularly as it relates to materials at smaller scales being used for fracture resistance. In this study, white cement paste specimens were cast, extracted and their hydration was stopped at desired curing ages. A Rockwell probe was used to scratch the surface of the specimens to determine the fracture toughness at that age. Classical Brazilian split-cylinder tests were also performed to compliment the scratch tests. The excellent convergence of the raw data allows the increase of fracture toughness and splitting strength over time to be determined. Finally, Irwin's characteristic length, which is proportional to the fracture process zone size, is determined and shown to asymptotically reach a constant size.
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U2 - 10.1061/9780784413111.043
DO - 10.1061/9780784413111.043
M3 - Conference contribution
AN - SCOPUS:84887399683
SN - 9780784413111
T3 - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013
SP - 364
EP - 371
BT - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete
PB - American Society of Civil Engineers (ASCE)
T2 - 9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013
Y2 - 22 September 2013 through 25 September 2013
ER -