scholarly journals Influence of the Interfacial Transition Zone and Interconnection on Chloride Migration of Portland Cement Mortar

2015 ◽  
Vol 13 (3) ◽  
pp. 169-177 ◽  
Author(s):  
Kai Wu ◽  
Linglin Xu ◽  
Geert De Schutter ◽  
Huisheng Shi ◽  
Guang Ye
Keyword(s):  
Portland Cement ◽  
Transition Zone ◽  
Cement Mortar ◽  
Interfacial Transition Zone ◽  
Chloride Migration

scholarly journals Influence of Graphene Oxide on Interfacial Transition Zone of Mortar

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Hongfang Sun ◽  
Zhili Ren ◽  
Li Ling ◽  
Shazim Ali Memon ◽  
Jie Ren ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Image Analysis ◽  
Graphene Oxide ◽  
Prediction Model ◽  
Transition Zone ◽  
Cement Mortar ◽  
Interfacial Transition Zone ◽  
Backscattered Electron ◽  
The Difference

In this paper, the influence of graphene oxide (GO) on the microstructure of interfacial transition zone (ITZ) in cement mortar was investigated through image analysis (IA) of backscattered electron (BSE) micrographs. The results showed that the incorporation of GO significantly reduced the thickness of ITZ. The porosity in ITZ and bulk paste decreased due to the introduction of GO; meanwhile, the compressive strength of the mortar samples was improved. The addition of GO also narrowed the gap between the porosity of ITZ and bulk paste, and therefore, the entire microstructure of mortar became more homogenous. Based on the above results, the model to predict the compressive strength of mortar was modified for better precision. The improved prediction model indicated that the difference between the compressive strength of ITZ and bulk paste was reduced upon the refinement of ITZ by GO.

Effect of the Interfacial Transition Zone on the Conductivity of Portland Cement Mortars

2004 ◽  
Vol 83 (5) ◽  
pp. 1137-1144 ◽  
Author(s):  
John D. Shane ◽  
Thomas O. Mason ◽  
Hamlin M. Jennings ◽  
Edward J. Garboczi ◽  
Dale P. Bentz
Keyword(s):  
Portland Cement ◽  
Transition Zone ◽  
Interfacial Transition Zone ◽  
Cement Mortars

A numerical model for permeability of cement mortar considering the interfacial transition zone

2021 ◽  
Vol 73 (1) ◽  
pp. 1-14
Author(s):  
Xun Han ◽  
Mingqian Ren ◽  
Xuehui An ◽  
Zuguang Liu ◽  
Ding Nie
Keyword(s):  
Numerical Model ◽  
Transition Zone ◽  
Cement Mortar ◽  
Interfacial Transition Zone

Microstructural Analysis of Paste and Interfacial Transition Zone in Cement Mortars Modified with Water-Soluble Polymers

2011 ◽  
Vol 466 ◽  
pp. 21-28 ◽  
Author(s):  
Elke Knapen ◽  
Dionys Van Gemert
Keyword(s):  
Transition Zone ◽  
Cement Mortar ◽  
Microstructural Analysis ◽  
Interfacial Transition Zone ◽  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Cement Mortars ◽  
The Matrix ◽  
Mixing Water

The presence of water-soluble polymers affects the microstructure of polymermodified cement mortar. Such effects are studied by means of SEM investigation. Polyvinyl alcohol-acetate (PVAA), Methylcellulose (MC) and Hydroxyethylcellulose (HEC) are applied in a 1 % polymer-cement ratio. The polymers provide an improved dispersion of the cement particles in the mixing water. The tendency of certain water-soluble polymers to retard the flocculation of the cement particles minimizes the formation of a water-rich layer around the aggregate surfaces. They also provide a more uniform distribution of unhydrated cement particles in the matrix, without significant depletion near aggregate surfaces. Both effects enable to reduce the interfacial transition zone (ITZ). The polymers also provide a more cohesive microstructure, with a reduced amount of microcracks.

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