Abstract
The purpose of the current study is to investigate the geopolymeric reactivity of volcanic tuff of Datça Peninsula (Earth of Datça) in Turkey and to evaluate whether it can be used as a green binder. The effects of alkali activator type, alkali hydroxide concentration, activator ratio, and curing conditions on the physical and mechanical properties were investigated. A combination of sodium silicate solution (SS) and potassium hydroxide (KOH) (12.5 M) with an activator ratio of 2.5 is selected as optimum activator type. Sealed curing at 90 °C and 90 ± 5% RH for 24 h provides the highest physical and mechanical properties. Results reveal that “Earth of Datça" as a natural pozzolan is a suitable precursor for the production of a geopolymer material with the properties of 2.0 g/cm3 bulk density, 5.4% water absorption ratio, 0.64 saturation coefficient, and 10.5 MPa compressive strength. The mortar produced in this research has promising characteristics to be used as a building material.
| Original language | English |
|---|---|
| Article number | 102760 |
| Journal | Journal of Building Engineering |
| Volume | 41 |
| DOIs | |
| Publication status | Published - Sept 2021 |
Bibliographical note
Publisher Copyright:© 2021 Elsevier Ltd
Funding
This work was supported by the ITU Center for Scientific Research Projects [grant number 41837 ]. The authors express their gratitude to Ibrahim Oztürk for testing the materials in Building Materials Laboratory, ITU, Faculty of Architecture. This work was supported by the ITU Center for Scientific Research Projects [grant number 41837]. The authors express their gratitude to Ibrahim Oztürk for testing the materials in Building Materials Laboratory, ITU, Faculty of Architecture.
| Funders | Funder number |
|---|---|
| Building Materials Laboratory | |
| ITU Center for Scientific Research Projects | 41837 |
| International Technological University |
Keywords
- Alkali activation
- Binder
- Earth of Datça
- Geopolymer
- Natural pozzolan