| Title |
Enhancing the Performance of Lime Mortar for Repairing and Restoring Architectural Heritage Using Traditional Brick Powder |
| Authors |
이다희(Lee, Da-Hee) ; 강성훈(Kang, Sung-Hoon) ; 권양희(Kwon, Yang-Hee) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.5.197 |
| Keywords |
Architectural Heritage; Lime Mortar; Traditional Brick Powder; Pozzolanic Reaction |
| Abstract |
Late Joseon Dynasty documents reveal the use of crushed roof tiles or bricks as additives for mortars. This study suggests a method for
enhancing the performance of mortar to restore and repair architectural heritage. To this end, the effects of traditional brick powder on the
hydration and strength development of lime mortar were investigated, with firing temperatures (800°C, 1000°C, 1200°C) and particle sizes
(<75 ㎛, 75-150 ㎛, 150-300 ㎛ and 300-500 ㎛) of the powder as main variables, while also considering the binder-to-aggregate ratio (1, 2,
3) as an additional variable. This allowed for a clear understanding of the mortar performance, including influencing factors that were not
documented in the historical records, such as fire temperature and particle size. The addition of the brick powder affected the workability and
compressive strength of the mortar, with the extent of this impact depending on the firing temperature and particle size. The results of tests
on the hydration characteristics such as isothermal calorimetry, X-ray diffraction, and thermogravimetric analysis revealed that the brick
powder reacts with hydrated lime under specific conditions of temperature (800°C) and particle size (<150 ㎛). This results in a pozzolanic
reaction, forming hydration products such as monocarboaluminate, hemicarboaluminate, stringite, and calcium silicate hydrate. The compressive
strength of the lime mortar increased by up to 2.2 times as a result of this reaction. These findings can be used to provide direction for
improving the performance of repair and restoration mortars. |