| Title |
Effect of Wasol Type and Replacement Ratio on Hydration Reaction and Strength Development of Korean Traditional Lime?Pozzolan Systems |
| Authors |
이다희(Lee, Da-Hee) ; 강성훈(Kang, Sung-Hoon) ; 권양희(Kwon, Yang-Hee) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.2.419 |
| Keywords |
Lime?Pozzolan System; Architectural Heritage; Non-hydraulic Lime; Brick Powder; Firing Temperature; Pozzolanic Reaction |
| Abstract |
This study examines the hydration and strength development of lime mortars containing Wasul, a traditional Korean pozzolanic material, with
particular attention to the effects of Wasul type and replacement ratio. Wasul produced from low-quality roof tiles calcined at 800 °C and
standard-quality roof tiles calcined at 950 °C was used to partially replace lime. Pozzolanic reactivity and microstructural characteristics were
evaluated through flowability, compressive strength, heat of hydration, X-ray diffraction, thermogravimetric analysis, and mercury intrusion
porosimetry. The results show that higher Wasul replacement ratios increase mortar flowability due to the dilution of lime. Wasul derived
from low-quality tiles exhibits high pozzolanic reactivity because the aluminosilicate phase remains largely amorphous, leading to improved
early and long-term strength development. In contrast, Wasul produced from standard-quality tiles shows limited pozzolanic reactivity and
contributes less to strength gain, as aluminosilicate crystallization has already begun. These findings clarify how Wasul type and replacement
ratio influence the reactivity and strength evolution of traditional lime-pozzolan systems, and provide a scientific basis for addressing the
inherent limitations of air lime mortars. |