Matches in SemOpenAlex for { <https://semopenalex.org/work/W3195944924> ?p ?o ?g. }
- W3195944924 endingPage "106582" @default.
- W3195944924 startingPage "106582" @default.
- W3195944924 abstract "The interfacial characteristics of geopolymer binder to aggregate composites are poorly understood, especially at molecular level. Herein, molecular models are developed to study, for the first time, the geopolymer-aggregate interface. Chemically, various forms of interfacial bonding are characterized, including Al-O-Si bonding through condensation reactions, Na O and H-bonding. An atomic-level interfacial transition zone (ITZ) is identified, attributed to the concentration of –OH groups. Increasing the Si/Al ratio of geopolymer is found to decrease the ITZ density, but have limited effect on the ITZ width. A heterogeneous diffusion characteristic occurs in geopolymer, due to the weak interfacial interaction. Mechanically, lowering the Si/Al ratio promotes the interfacial strength due to the stronger interfacial interaction and higher cross-linking degree in geopolymer. Under loading the interfacial fracture undergoes three stages: crack propagation, chain bridging (including aluminosilicate and ionic bridging) and breakage. The above atomic-level findings may facilitate a better design of geopolymer concrete in engineering." @default.
- W3195944924 created "2021-08-30" @default.
- W3195944924 creator A5049358486 @default.
- W3195944924 creator A5091042720 @default.
- W3195944924 date "2021-11-01" @default.
- W3195944924 modified "2023-10-14" @default.
- W3195944924 title "Understanding geopolymer binder-aggregate interfacial characteristics at molecular level" @default.
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