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Fracture of foamed portland cements
AbstractThe effects of microstructural parameters such as pore size, pore wall thickness, grain size, and bulk density on the mechanical behavior of foamed Portland Type I and Type III cements with densities ranging from 0.28 (18 lb/ft3) to 0.72 g/cm3 (45 lb/ft3) were studied.For both types of cements the elastic modulus and notched-beam fracture surface energies were found to increase with increasing bulk density.The strength of notched specimens varied as a function of the inverse square root of the notch depth indicating that the Griffith criterion of failure is applicable. The strength was found to increase with increasing bulk density which correlated with changes in the elastic modulus and fracture surface energy. The maximum in the strength as a function of refining time correlated with a minimum in the pore size.
Fracture of foamed portland cements
AbstractThe effects of microstructural parameters such as pore size, pore wall thickness, grain size, and bulk density on the mechanical behavior of foamed Portland Type I and Type III cements with densities ranging from 0.28 (18 lb/ft3) to 0.72 g/cm3 (45 lb/ft3) were studied.For both types of cements the elastic modulus and notched-beam fracture surface energies were found to increase with increasing bulk density.The strength of notched specimens varied as a function of the inverse square root of the notch depth indicating that the Griffith criterion of failure is applicable. The strength was found to increase with increasing bulk density which correlated with changes in the elastic modulus and fracture surface energy. The maximum in the strength as a function of refining time correlated with a minimum in the pore size.
Fracture of foamed portland cements
Hengst, R.R. (author) / Tressler, R.E. (author)
Cement and Concrete Research ; 13 ; 127-134
1983-10-25
8 pages
Article (Journal)
Electronic Resource
English
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