Akademik Veri Yönetim Sistemi
IV. INTERNATIONAL ANKARA CONFERENCE ON SCIENTIFIC RESEARCH, Ankara, Türkiye, 10 - 11 Nisan 2021, cilt.1, sa.1, ss.186-194
In this study, the strength development of geopolymer mortar specimens subjected to the prerest period was investigated under the effect of microwave (MW) curing. In the study, in the
production of geopolymer mortar samples, NaOH as an activator and F class fly ash as a
binder were used and prismatic samples of 40x40x160mm were produced. The sand-binder
ratio was determined as 3 and the water-binder ratio was 0.35 in the samples produced. CEN
standard sand was used in the preparation of the mixtures. After the samples were placed in
molds, they were kept in room conditions for 0, 1, 2, 3, 7, 14, and 28 days. The samples that
completed the pre-rest period were firstly heat cured at 75⁰C for 6 hours. After heat curing,
microwave cure was applied to geopolymer mortar samples at 180 W (Watt) for 60 minutes.
After curing, the unit weight, ultrasonic pulse velocities, the flexural, and compressive
strength of the samples were determined. According to the results obtained, the flexural and compressive strengths of the samples
subjected to the pre-rest period were increased. The flexural strength of the samples, which
were subjected to heat curing at 75⁰C for 6 hours after the pre-rest period, was obtained as a
maximum of 2.15 MPa, and compressive strength was determined as 12.50 MPa. On the other
hand, flexural strengths up to 5.16 MPa and compressive strengths up to 25.3 MPa were
determined in samples subjected to microwave curing after heat curing. In general, an
increase in the strengths obtained after heat curing and microwave curing was observed with
the increase in the pre-rest period. The results ofthe study showed that a much higher and
faster strength gain can be achieved by pre-rest and microwave curing in geopolymer mortar
samples.