ELASTIC PROPERTIES OF CONSTITUENT PHASES IN PORTLAND CEMENT MORTAR INCORPORATING FLY ASH

Author(s): Y.Y. Gao, Y.M. Zhang, Y.G. Han, Z.J. Li
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 165-173
Total Pages: 961
Language : English

Abstract: Elastic properties of constituent phases in mortar are very important inputs for modelling the macroscopic mechanical properties of cement based materials using multi-scale modelling. A mortar incorporating fly ash was analyzed by grid-nanoindentation coupled with scanning electron microscope image analysis. At the microscopic scale, the elastic moduli of three kinds of sand are 108.06GPa, 93.22GPa, 66.43Gpa, respectively. And the elastic modulus of fly ash is between 40.18GPa and 119.95GPa with a mean value of 70.63GPa. Meanwhile, the existence of low density hydration products and high density hydration products could still be found in the mortar incorporating fly ash and the calculated elastic moduli of these two phases are 21.14GPa and 28.32GPa, correspondingly. The results also show that there is a new kind of hydration product existing in the mortar incorporating fly ash with a mean elastic modulus of 13.19GPa, which is supposed to be the product of pozzolanic effect of fly ash.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00