Preparation and characterization of self-cured geopolymer binder using metakaolin precursor
H. M. Khater, S. A. ElMoied
TL;DR
This paper introduces a self-curing geopolymer binder that achieves high strength at room temperature, potentially replacing traditional cement.
Contribution
The study introduces a novel self-curing geopolymer system using OPC and process modifications, eliminating the need for external heat or alkaline liquids.
Findings
Adding OPC enhances early strength and mechanical properties of geopolymers.
Latent heat from OPC and activators provides internal heat comparable to external curing.
Strength values of up to 48 MPa were achieved with 40% replacement after 28 days.
Abstract
This study presents an advancement in “Self-cured geopolymer” technology, aiming to enable ambient-temperature curing. The experimental work systematically investigated two primary strategies: the incorporation of Ordinary Portland Cement (OPC) as an additive and the modification of manufacturing processes. The results demonstrate that the supplementary calcium from OPC enhances the geopolymer’s curing regime, yielding superior early-age strength and mechanical properties. Notably, the latent heat released from the reactions of high-energy compounds (e.g., OPC and activators) was found to be a significant internal heat source, functionally comparable to external heat curing. The synergy of these approaches establishes a feasible pathway for developing “Self-cured geopolymer cement” that achieves substantial mechanical strength under ambient conditions. The developed Self-cured…
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Taxonomy
TopicsConcrete and Cement Materials Research · Concrete Properties and Behavior · Microbial Applications in Construction Materials