Property investigation of individual phases in cementitious composites containing silica fume and fly ash |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China;2. Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing, China;1. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, United States;2. Facultad de Ingeniería y Ciencias Aplicadas, Universidad de los Andes, Chile;3. G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, United States;1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA;2. Schlumberger Riboud Product Center, 1 Rue Henri Becquerel, Clamart 92140, France;3. Schlumberger-Doll Research Center, 1 Hampshire St., Cambridge, MA 02139-1578, USA |
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| Abstract: | In this study, nanoindentation was used to investigate the microstructures of cementitious composites containing silica fume and fly ash. With the help of scanning electron microscope, the mechanical properties (elastic modulus and hardness) of individual phases (like outer product, inner product, calcium hydroxide, remained fly ash particles, residual cement grains) in cementitious composites containing silica fume and fly ash were investigated and analyzed. Additionally, this study examined the differences between the ‘C–S–H’ phases in the different cementitious composites and provided an insight into the influence of mineral admixtures (silica fume and fly ash) on the properties of the ‘C–S–H’ phase. |
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| Keywords: | Silica fume Fly ash Microstructure Calcium silicate hydrate Mechanical properties |
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