TY - JOUR
T1 - Micro- and macroscale coefficients of friction of cementitious materials
AU - Lomboy, Gilson
AU - Sundararajan, Sriram
AU - Wang, Kejin
N1 - Funding Information: This research is sponsored by the National Science Foundation (Grant No. 0927660 ). The assistance from Mr. Robert Steffes in the direct shear test setup is greatly appreciated.
PY - 2013
Y1 - 2013
N2 - Millions of metric tons of cementitious materials are produced, transported and used in construction each year. The ease or difficulty of handling cementitious materials is greatly influenced by the material friction properties. In the present study, the coefficients of friction of cementitious materials were measured at the microscale and macroscale. The materials tested were commercially-available Portland cement, Class C fly ash, and ground granulated blast furnace slag. At the microscale, the coefficient of friction was determined from the interaction forces between cementitious particles using an Atomic Force Microscope. At the macroscale, the coefficient of friction was determined from stresses on bulk cementitious materials under direct shear. The study indicated that the microscale coefficient of friction ranged from 0.020 to 0.059, and the macroscale coefficient of friction ranged from 0.56 to 0.75. The fly ash studied had the highest microscale coefficient of friction and the lowest macroscale coefficient of friction.
AB - Millions of metric tons of cementitious materials are produced, transported and used in construction each year. The ease or difficulty of handling cementitious materials is greatly influenced by the material friction properties. In the present study, the coefficients of friction of cementitious materials were measured at the microscale and macroscale. The materials tested were commercially-available Portland cement, Class C fly ash, and ground granulated blast furnace slag. At the microscale, the coefficient of friction was determined from the interaction forces between cementitious particles using an Atomic Force Microscope. At the macroscale, the coefficient of friction was determined from stresses on bulk cementitious materials under direct shear. The study indicated that the microscale coefficient of friction ranged from 0.020 to 0.059, and the macroscale coefficient of friction ranged from 0.56 to 0.75. The fly ash studied had the highest microscale coefficient of friction and the lowest macroscale coefficient of friction.
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U2 - 10.1016/j.cemconres.2013.08.006
DO - 10.1016/j.cemconres.2013.08.006
M3 - Article
SN - 0008-8846
VL - 54
SP - 21
EP - 28
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -