| 石膏原岩静水溶蚀时间-温度效应试验初步研究 |
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| 引用本文： | 张玲玲.石膏原岩静水溶蚀时间-温度效应试验初步研究[J].中国岩溶,2019,38(2):265-268. |
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| 作者姓名： | 张玲玲 |
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| 作者单位： | 山西省第三水文地质工程地质队，山西 晋中 030620 |
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| 摘 要： | 文章对石膏原岩在静水溶蚀条件下的时间-温度效应进行了初步研究,并从微观角度对石膏岩溶蚀破坏机理进行分析。试验发现随着溶液温度的升高、溶蚀时间的延长,石膏岩溶蚀破坏加剧。具体表现为:石膏岩失重率随温度升高、时间延长而增大,溶蚀速率均值随温度升高而增大;溶液中Ca^2+浓度随温度升高、时间延长而增大,Ca^2+浓度增长速率均值随温度升高而增大。Fick扩散及溶胀应力是石膏岩溶蚀破坏的主要原因。静水溶蚀条件下,石膏原岩主要溶蚀破坏形式为:溶胀裂缝、柱状劈裂及片状剥离。
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| 关 键 词： | 石膏原岩 温度 时间效应 溶蚀效应 |
Preliminary experimental study on time-temperature effects of gypsum rock corrosion in static water |
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| ZHANG Lingling.Preliminary experimental study on time-temperature effects of gypsum rock corrosion in static water[J].Carsologica Sinica,2019,38(2):265-268. |
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| Authors: | ZHANG Lingling |
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| Institution: | The 3rd Hydrological & Engineering Geological Team of Shanxi Province, Jinzhong, Shanxi 030620,China |
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| Abstract: | This work studies the time-temperature effects of gypsum rock corrosion in static water in laboratory. The mechanism of gypsum rock corrosion is observed by the Scanning Electron Microscope (SEM) method. The results indicate that gypsum rock would be corroded more seriously with temperature rising and time prolonging. The weight loss rate of gypsum rock increases with temperature rising and time prolonging. The corrosion rate of gypsum rock also increases with the rise of temperature. So does the concentration of Ca2+ in water. The main reasons for gypsum rock corrosion are Fick diffusion and water swelling stress resulted from water absorption. The main corrosion ways of gypsum rock in static water are fracturing caused by water swelling, columnar splitting and flake exfoliation. |
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| Keywords: | gypsum rock temperature time effect corrosion effect |
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