Material characterization reveals high heat resistance but weathering vulnerability in historical Od volcanic tuff, indicating limited suitability for modern paving and cladding.
Key Points
Investigate the geological, mineralogical, and geomechanical properties of Od volcanic stone to determine its suitability for modern restoration and construction.
Gathered volcanic tuff samples from south Karamürsel for petrographic thin-section analysis to classify rock composition.
Conducted standard laboratory geomechanical testing, including uniaxial compressive strength, Schmidt hammer rebound, and frost resistance assays.
Petrographic analysis classified the stone as rhyodacitic-dacitic tuff dominated by plagioclase and feldspar minerals susceptible to clay alteration.
Mechanical testing showed an average uniaxial compressive strength of 56.78 MPa, point load strength of 5.69 MPa, water absorption of 1.3%, and Schmidt rebound value of 18.
Durability assays recorded 99.61% MgSO4 frost resistance, 55.65% Los Angeles abrasion resistance, and a Böhme friction abrasion loss of 11.54 cm³/50 cm².