Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Mechanical properties of glass-based geopolymer affected by activator and curing conditions under the optimal aging conditions

Version 1 : Received: 9 April 2021 / Approved: 12 April 2021 / Online: 12 April 2021 (09:38:07 CEST)

A peer-reviewed article of this Preprint also exists.

Chen, T.-A. Mechanical Properties of Glass-Based Geopolymers Affected by Activator and Curing Conditions under Optimal Aging Conditions. Crystals 2021, 11, 502. Chen, T.-A. Mechanical Properties of Glass-Based Geopolymers Affected by Activator and Curing Conditions under Optimal Aging Conditions. Crystals 2021, 11, 502.

Journal reference: Crystals 2021, 11, 502
DOI: 10.3390/cryst11050502

Abstract

Inorganic polymeric materials react slowly at room temperature and as a result usually require high-temperature curing. This study used the Arrhenius equation to analyze the correlation between curing temperature and curing duration during high-temperature curing. The test results show that optimal values exist for each alkali equivalent of the activator (weight ratio of Na2O/glass powder), curing temperature, and curing duration. Extending the curing duration and increasing the curing temperature have positive effects when the alkali equivalent is lower than the optimal value. However, over-curing results in invisible cracking in the specimens. Furthermore, despite exhibiting high strength initially, the strength of specimens gradually diminishes after standing in air. To ensure the durability of glass-based geopolymer, the curing temperature should not exceed 70℃, and the curing duration should be less than one day.

Subject Areas

Waste glass; Inorganic binder; Curing temperature; Curing duration

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