混凝土材料表層水分變化受環境濕度影響之先期研究

Preliminary Study of the Moisture Variation in the Surface of the Concrete Material Affected by the Environmental Humidity

喻新(Hsin Yu) ； 歐陽慧濤(Huei-Tau Ouyang) ； 江啓明(Chii-Ming Jiang) ； 林政隆(Cheng-Long Lin)

《農業工程學報》 53卷2期 (2007/06) Pp. 15-21

https://doi.org/10.29974/JTAE.200706.0002

摘要

台灣地區溫暖潮濕，是適合霉菌生長的環境；在混凝土材料霉菌生長與表層水分有較大相關，所以本研究之目的在瞭解水害建築物室內空氣相對溼度環境因子與混凝土外殼（例如牆壁）的表層水分、孔隙相對溼度及混凝土材料水分含量變化之關係，以作為評估環境變化時對建築材料所產生之表面溼度狀況，進而評估霉菌生長之可能性。研究方法利用實驗箱中各固定溫溼度的環境狀況下，將混凝土試體鑽孔以量測其孔隙相對溼度，同時以水分計量測材料表層水分，並將試體稱重及烘乾，以得到混凝土材料含水量的變化。結果得到孔隙相對溼度、試體水分含量與試體表面水分與環境相對溼度之水分等溫圖，並可得到三種水分之相互關係圖，可以作為以環境相對溼度預測混凝土材料水分狀況之基礎資料，以評估霉菌生長之可能性。

關鍵字

混凝土材料 ； 表層水分 ； 相對溼度 ； 霉菌生長

並列摘要

The climate of Taiwan area is warm and humid that is beneficial for mold growth. The effect is significant between mold growth and the surface water condition. The objective of this study is to find the relationship between the relative humidity of environment and the surface moisture, pore relative humidity, and water content of concrete materials, such as a concrete wall, in a water damaged building. Concrete samples are stored in a controlled plant growth chamber with constant relative humidity to measure the pore relative humidity by drilling a hole with a humidity sensor, and to measure the surface moisture by moisture meter, the water content of concrete samples is decided by weighting and oven-dry method. The pore relative humidity, water content, and surface moisture related to the environmental relative humidity are concluded as plots of water isotherm. The relationships between the above moisture expressions are also found. These results are not only helpful to predict the moisture condition of concrete materials with environmental relative humidity, but also can evaluate the possibility of mold growth.

並列關鍵字

Concrete materials ； Surface moisture ； Relative humidity ； Mold growth