Ambient Temperature Drying Shrinkage and Cracking in Metakaolin-Based Geopolymers
By Carsten Kuenzel, L. Vandeperre, S. Donatello, Aldo R. Boccaccini, Chris Cheeseman. 2012
262 citations recorded by the source corpus.
Ambient temperature drying shrinkage in metakaolin-based geopolymer pastes exposed to low relative humidity environments has been investigated. The effect of varying the geopolymer composition (water content, Si:Al ratio, Na:Al ratio, and Na + or K + cations) on the sensitivity to ambient temperature drying shrinkage is reported. The definition of “structural” water as being the minimum water content required that prevents contractions in the gel structure, and thus drying shrinkage from occurring, is introduced. From the results presented, it is clear that the ionic charge density of cations, the total quantity of cations, and the relative quantities and stabilities of cation: AlO4 � pairs in the paste are major factors affecting the sensitivity of pastes to ambient temperature drying shrinkage.
Subfields: Civil and Structural Engineering, Earth-Surface Processes
View Paper: https://www.semanticscholar.org/paper/d2243948f1cf5b7bf2fa2309d8021faf6ec2bb0e
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In Civil and Structural Engineering
- Mingzhong Zhang
- P. Ghadir
- Navid Ranjbar
- Pascaline Patureau
- A. Marsh
- Ö. Cizer
- Ahmed Khalifa
- Y. Pontikes
In Earth-Surface Processes
Citations in the corpus
- Advances in alkali-activation of clay minerals (2020, methodology): “On a micro-to-macro level, as for other cements, liquid:solid ratio influences the workability of the fresh mixture [139], as well as the drying shrinkage [41,42], porosity, and hence strength, of the hardened microstructure [140,141].”
- Fiber-reinforced geopolymer composites: A review (2020, background): “3 Drying shrinkage Drying shrinkage of geopolymers is due to the high capillary pressure produced between wet and dry zones of the micropore network, which leads to specimen deformation and crack initiation [140].”
- Clayey soil stabilization using geopolymer and Portland cement (2018, background): “The structural water is not evaporable at low temperatures [29, 30].”