The Influence of Water Absorption Increment on Infrared Radiation Characteristics of Rammed Earth
Targeting for the description of water occurrence status in the rammed earth of Mogao Grottoes, the infrared thermography was applied to study the relationship between water absorption increment and infrared radiation temperature at various water absorption stages. The result showed that (1) before the infiltrating of all rock samples, and due to the impact of the increasing volume of water passing, the overall relationship between the water absorption increment of unit mass of dry rocks and the infrared radiation temperature was positive, but no obvious regular difference existed in various water absorption stages; (2) by making use of the characteristic that NMI of adjacent thermal images was 0, the moment when water in rammed earth turned from partial infiltration to complete infiltration could be judged; (3) by making use of the characteristic that NMI of adjacent thermal images was 0, the moment when rammed earth turned from unsaturation to complete saturation could be judged. A non-destructive, convenient and real-time method was expected to be provided for the judgment of water occurrence conditions in rammed earth of Mogao Grottoes.
KeywordsWater occurrence conditions Water absorption increment Infrared radiation characteristics Mutual information
This work was supported by the National Natural Science Foundation for Young Scientists of China [Grant Nos. 51604276 and 41502323].
- 1.Kuchitsu, N., Ishizaki, T., Nishiura, T.: Salt weathering of the brick monuments in Ayutthaya. Eng. Geol. 55(1), 91–99 (1999)Google Scholar
- 4.Ye, D., Hongjun, G., Lei, Q., et al.: Application of infrared thermography in the water-proof and leakage detection of underground buildings. China Building Waterproofing 5, 33–36 (2014)Google Scholar
- 6.Grinzato, E., Ludwig, N., Cadelano, G., et al.: Infrared thermography for moisture detection: a laboratory study and in-situ test. Mater. Eval. 69(1), 97–104 (2011)Google Scholar
- 7.Shakmak, B., Al-Habaibeh, A.: Detection of water leakage in buried pipes using infrared technology; a comparative study of using high and low resolution infrared cameras for evaluating distant remote detection. In: Applied Electrical Engineering & Computing Technologies, pp. 1–7 (2015)Google Scholar
- 9.Mingde, D., Zongfei, F., Xiaohong, L., et al.: Research on the action of water in the infra-red radiation of rocks. Earthq. Res. China 13(3), 288–296 (1997)Google Scholar
- 10.Huihui, Z.: The experimental study on the use of infrared thermal imaging for nondestructive detection of deterioration disease in stone relics. J. Liaoning Prov. College Commun. 15(06), 20–22 (2013)Google Scholar
- 11.Yuhua, W., Shanjun, L.: Infrared imaging detection on water-permeation of rock paint-ings. Geotech. Invest. Surv. 38(05), 31–35 (2010)Google Scholar
- 13.Furmański, P., Wiśniewski, T., Wyszyńska, E.: Detection of moisture in porous materials through infrared methods. Arch. Thermodyn. 29(1), 19–40 (2008)Google Scholar
- 15.Yong, W.: Study of the machine learning methods based on mutual information and prior knowledge. Institute of Automation, Chinese Academy of Sciences (2014)Google Scholar
- 16.Yu, Z.: Scene matching techniques based on mutual information and spatial information. Xidian University (2013)Google Scholar
- 17.Zhengwei, X.: Medical image registration based on normalized mutual information. Kunming University of Science and Technology (2014)Google Scholar