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Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment
المؤلفون المشاركون
Liu, Guang-cheng
Huang, Xin
Pang, Jianyong
Chen, Yu
المصدر
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-17، 17ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-03-21
دولة النشر
مصر
عدد الصفحات
17
التخصصات الرئيسية
الملخص EN
Underground engineering, especially deep geotechnical engineering, is often affected alternately by groundwater infiltration and ventilation drying during construction and use.
In addition, acid rain, mineral dissolution, acid deposition, and other factors make groundwater acidic.
This caused the underground structure to erode and has also threatened its safety and durability.
In this study, both the physical and mechanical properties under acid dry-wet (A-D-W) cycles were investigated.
Deep sandstone was treated repeatedly under acid cycling, and its physical parameters were measured.
Uniaxial compressive strength tests and microtests were carried out.
Finally, using a combination of scanning electron microscopy (SEM) and backscatter electron images (BSE), the microstructural changes of sandstone under the combined action of an acidic environment and a dry-wet cycle were described.
The test results show that the mass, P-wave velocity, peak stress, and elastic modulus of sandstone after the A-D-W cycles decreased by 0.43%, 7.87%, 70.20%, and 88.10%, respectively.
With the increase in the number of cycles, the loss of these indicators increased.
However, the peak strain increased with an average increase of 55.8%.
In addition, 10 cycles are the critical point for physical and mechanical indicators of the A-D-W cycles.
After 10 cycles, the changes of various indicators increase rapidly.
Microscopic analysis shows that the reasons of this phenomenon were that the specimen was corroded by the sulfuric acid solution, which resulted in the development of pores and cracks and the decline of physical and mechanical properties.
Conversely, the development of pores was hindered by sediment, which slowed down the decline rate of the physical and mechanical indexes of specimens, but this phenomenon disappeared with the increase of A-D-W cycles.
Based on the analysis of the experimental phenomena, the constitutive model of uniaxial compression based on Weibull damage variable has been established in this article, and the model has the best effect in acid solution with less cycle times or pH value of solution greater than 6.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Huang, Xin& Pang, Jianyong& Liu, Guang-cheng& Chen, Yu. 2020. Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1121184
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Huang, Xin…[et al.]. Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment. Advances in Civil Engineering No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1121184
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Huang, Xin& Pang, Jianyong& Liu, Guang-cheng& Chen, Yu. Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1121184
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1121184
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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