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Mechanical properties and compositional heterogeneities of fresh geopolymer pastes

Abstract This work explains the elastic properties of the reactive suspensions of metakaolin in sodium silicate solutions immediately after mixing. The flow properties of the interstitial fluid were obtained by mimicking it with synthetic aluminosilicate gels of different Si/Al molar ratios. By comparing these results with the rheological properties of fresh geopolymer pastes and with the ones of unreactive suspensions, we showed that the early age mechanical properties of geopolymer mixes cannot be explained by the colloidal interactions between metakaolin grains but rather by the formation of a gel with a molar ratio Si/Al
- French Institute for Research in Computer Science and Automation France
- Sciences et Ingenierie de la Matière Molle France
- French Institute of Science and Technology for Transport, Spatial Planning, Development and Networks France
- Institute for Building Materials (IfB), Switzerland
- Grenoble Institute of Technology France
FLY-ASH, Alkalis, SODIUM-SILICATE, CHEMICAL-COMPOSITION, [PHYS] Physics [physics], ALUMINOSILICATE GELS, PHYSICAL-CHEMISTRY, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS]Physics [physics], ALKALINE ACTIVATION, [ PHYS ] Physics [physics], INORGANIC POLYMERS, ENERGY EFFICIENCY, CEMENT INDUSTRY, NMR, [PHYS.COND.CM-SCM] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Elastic Moduli, [ PHYS.COND.CM-SCM ] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Rheology, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], [ PHYS.COND ] Physics [physics]/Condensed Matter [cond-mat], Metakaolin, PORTLAND-CEMENT, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat]
FLY-ASH, Alkalis, SODIUM-SILICATE, CHEMICAL-COMPOSITION, [PHYS] Physics [physics], ALUMINOSILICATE GELS, PHYSICAL-CHEMISTRY, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS]Physics [physics], ALKALINE ACTIVATION, [ PHYS ] Physics [physics], INORGANIC POLYMERS, ENERGY EFFICIENCY, CEMENT INDUSTRY, NMR, [PHYS.COND.CM-SCM] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Elastic Moduli, [ PHYS.COND.CM-SCM ] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Rheology, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], [ PHYS.COND ] Physics [physics]/Condensed Matter [cond-mat], Metakaolin, PORTLAND-CEMENT, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat]
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