Mechanical and Durability Properties of Fly Ash Based Geopolymers Mortars with Different Filling Materials

Tammam Y., Chakkor O., Uysal M., Canpolat O., Aygörmez Y., Al-Mashhadani M., ...More

4th Eurasian Conference on Civil and Environmental Engineering (ECOCEE), İstanbul, Turkey, 17 - 18 June 2019, pp.866-874

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.866-874
  • Yıldız Technical University Affiliated: Yes


The cement industry accounts for about 7% of all CO2 emissions caused by humans. Therefore, it is necessary to find another material in order to support sustainable material. An alternative way is replacing cement material with alternative material as fly ash. Fly ash as a binder is needed to mix with an activator which consists the sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). Fly ash (FA) and Ground Granulated Blast Furnace Slag (GGBS) are the most common aluminosilicate materials used in the production of geopolymer concrete.

This paper is about an experimental investigation which was carried out to study some mechanical and microstructural characteristics of fly ash based geopolymer mortars with three different filler types (limestone, marble, and basalt stone powder) by replacing it with river sand in different ratios. Compressive and flexural strengths for the different geopolymeric specimens were tested in 7, 28 and 56 days. Also voids ratio was tested. Experimental test results indicated that adding limestone filler effect positively on compressive strength. Experimental test results indicated that fly ash based geopolymer positively effect on the compressive and flexural strength properties of geoplymer composites.