Temporal dynamics of rheological properties of metakaolin-based geopolymers: Effects of synthesis parameters

Despite advanced development of geopolymers, reliable methods to define their technological features are scarce. The objective of this paper is to evaluate the influence of synthesis parameters (water/binder ratio, alkaline activator type and concentration) on the temporal rheological behavior of metakaolin-based geopolymers. Oscillatory tests were conducted in rheometer with a parallel-plates system, where different rheological parameter were measured (storage/loss modulus, linear viscoelastic interval, loss factor, transition point, among others). The rheological behavior was assessed over time. From the results was identified the time period when pastes in fresh state can be handled and which synthesis conditions improve the workability. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

This study evaluated the influence of synthesis parameters on the temporal rheological behavior of metakaolin-based geopolymers using oscillatory tests. It identified the time period when pastes in fresh state can be handled and which synthesis conditions improve the workability.