Akademik Veri Yönetim Sistemi
The First International Cement Based Composite Congress , Erzurum, Türkiye, 29 - 30 Haziran 2022, cilt.1, sa.1, ss.83-88
This study investigates the mechanical properties of silica fume and
quartz powder ultra-high performance geopolymer concrete.In the
designed geopolymer concrete mixtures, ground blast furnace slag
(GGBFS) as binding material, silica fume (SF) for rapid strength gain
of geopolymer concrete, quartz powder of 0-0.05 mm and 1-3 mm diameters
as aggregate, and sodium hydroxide (NaOH) and sodium silicate (Na2SiO3)
as alkali solutions were used. In the mixtures, a constant volume ratio
of 29.9% and 14.9%, 0-0.05 mm and 1-3 mm diameters of quartz were
used, respectively. In addition, a total of three different geopolymer
mixture designs were made as 2.1%, 4.2% and 6.4% silica fume.
Geopolymer mixtures were kept in curing environments at 60℃ for 4, 6
and 8 hours. Physical, mechanical and capillary water absorption
properties of geopolymer samples with different mixing ratios were
determined experimentally. The test results showed that the highest
compressive strength was 97.9 MPa and flexural strength was 9.4 MPa
in the mixture with the lowest silica fume and kept in the curing
environment for 8 hours. In addition, it was determined that the lowest
capillary water absorption value was 0.43 kg/m2 and the lowest dry
unit volume weight value was 2203 kg/m3 in the same mixture.