Abstract
The mudstone is undergoing great change and disintegration in cyclic wetting–drying due to the weak durability, and the change is expected to cause geohazards and potential risks for engineering. The probable impact emphasizes the vitality of understanding mudstone disintegration in various environments. Slake durability tests considering four different factors are implemented: (i) only drainage (to simulate moisture environment), (ii) cyclic wetting and drying, (iii) rotation speed of apparatus (frequency of drainage and filling), and (iv) solutions. This work extends the limitation of research by experimentally investigating the four impact factors in mudstone disintegration and analyzing grain size distribution with orthogonal images improving accuracy. In this experiment, four indexes of describing disintegration performance, i.e., slake durability index, grain size gradation, relative breakage, and median grain size were acquired throughout experimental process. This research shows mudstone disintegration should be considered in moisture environment. In comparison, cyclic wetting and drying, high rotation speed, and ion-enriched solution significantly impact and weaken the durability of mudstone. The findings reveal probable impacts may lead to geohazards and potential risks in various exposed environment of mudstones. Grain analysis based on orthogonal images considers grain shape effect of conventionally sieving disintegrated mudstone grains and improves the acquired grain size distribution.
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This study was supported by the National Key R&D Program of China (2018YFC1504804) and the National Natural Science Foundation of China (No. 41977215).
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He, J., Leng, Y., Wu, Y. et al. Slaking and disintegration behavior of mudstone: insights from laboratory experiment and orthogonal images. Bull Eng Geol Environ 81, 277 (2022). https://doi.org/10.1007/s10064-022-02778-w
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DOI: https://doi.org/10.1007/s10064-022-02778-w