Development of a Self-Cured Alkali-Activated Mortar


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Ekiz Barış K.

Journal of sustainable construction materials and technologies (Online), cilt.10, ss.263-279, 2025 (Scopus, TRDizin) identifier

Özet

Alkali-activated mortars (AAM) can be produced with self-curing (SC), which supplies internal moisture to accelerate

alkaline-activation reactions. The aim of using SC is to make AAMs with an early-age strength without any additional

curing energy consumption and higher CO2 emissions, and to obtain in-situ practical advantages that enable the large-

scale application of AAMs. The previous study produced natural pozzolan-based AAMs by applying energy-intensive

heat (HC), microwave (MWC), and hybrid (HC+MWC) curing. This study investigates alternative curing regimes that

reduce production energy without compromising material properties. The impacts of air curing (AC), water curing (WC),

and SC on the properties were investigated. PEG 400 was used as an SC agent. The key findings of the research can be

summarized as follows: AC and SC were determined as alternative methods, whereas WC didn’t show a positive effect

on the properties at either early or later periods. Increasing the curing period from 7 to 90 days greatly improves the

properties. However, this increasing rate after 90 days was lower than in the early period. The properties after 28-day

AC and SC met the values of HC and MWC. The highest compressive strength (19.20 MPa), flexural strength (3.35 MPa),

ultrasound velocity (2.67 km/s), and unit weight (2.26 g/cm3) were obtained after 365-day SC.