CHARACTERIZATION OF EARLY-AGE MECHANICAL AND MICROSTRUCTURAL PROPERTIES OF GEOPOLYMER COMPOSITE MORTARS USING OBSIDIAN POWDER AS BINDER


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Çakmak T., Kurt Z., Ustabaş İ.

ASES II. INTERNATIONAL KAYSERI SCIENTIFIC RESEARCH CONFERENCE, Kayseri, Turkey, 26 - 28 January 2024, pp.1-9

  • Publication Type: Conference Paper / Full Text
  • City: Kayseri
  • Country: Turkey
  • Page Numbers: pp.1-9
  • Recep Tayyip Erdoğan University Affiliated: Yes

Abstract

Cement, the binder component of concrete, which is the most widely used in the construction

industry, emits a significant amount of CO2 to nature during production and utilization. Due to

global warming which threatens the future of our world, it is desired to reduce the production

of cement and the consumption of traditional concrete. At this point, geopolymer stands out as

it is one of the sustainable technologies. In this study, early-age mechanical and microstructural

properties of geopolymer composite mortars were investigated using obsidian powder as a

binder and NaOH as an alkali activator. Geopolymer mortar specimens were produced by TS

EN 196-1 standard with dimensions of 40x40x160 mm, and 3 samples were used for each

mechanical test. Geopolymer mortars were cured at 90 °C, and compressive strengths were

measured at 2, 4, and 8 hours. Also, SEM analysis was conducted to determine the microstructural properties of the mechanically tested specimens. To sum up, geopolymer mortar

with obsidian powder gained 8 MPa compressive strength value for 8h curing time.