Weathering rate quantification and lifetime of the building stones used in Angkor monuments, Cambodia

分析了位于亚热带环境的吴哥古迹的风化速率和建筑石材的寿命以及风化环境。在7-12世纪建造的古迹中，在原始位置测量了建筑石材的风化速率和物理化学性质，并进行了岩石风化试验。此外，利用安装在吴哥窟寺庙圣殿内的气象观测数据记录仪对风化环境进行了测量。结果表明，29个纪念地35个点的风化速率为0.7 ~ 9.2 mm/100 yr。建筑石材的风化初期以轻微的理化性质变化和藻类覆盖开始，随后风化速率表现出较强的方向性依赖性。建筑石材的寿命与体积和干湿变化的频率有关。

Weathering rates and lifetime of building stones along with weathering environment were analysed at Angkor monuments located in sub-tropical environment. In the monuments which were constructed in 7-12th century, weathering rates and physicochemical properties of the building stones were measured in the original position accompanied by rock weathering tests. In addition, weathering environment was measured using data loggers installed in the sanctuary of Angkor Wat temple with meteorological observation. As a result, the weathering rates of 35 points of 29 monuments were 0.7 - 9.2 mm/100 yr. Weathering of the building stones starts with slight physicochemical property change and algae covering in the early stage, then weathering rates reveal strong directional dependence. Lifetime of the building stones is concerned with volume and frequency of wet-dry change.