Identification of Pore Structure of Waterproof Sheet in Underground Engineering Based on Micro-CT Technology
- 10.2991/ifeesm-17.2018.13How to use a DOI?
- Underground engineering; Waterproof sheet; Micro-CT technology; Porosity; Connectivity; Equivalent diameter
The microstructure of waterproof sheet in corrosive water environment of underground engineering was studied by using X-ray CT technology, and the indexes characterizing the failure of material impermeability were explored. Distilled water and NaOH solutions were prepared to simulate corrosive groundwater environment, Ethylene-Propylene-Diene Monomer (EPDM) waterproof sheet in groundwater environment was scanned with micro-CT technology, 3D reconstruction images were acquired, porosity and pore connectivity were calculated, the number and volume of pores in each equivalent diameter interval were counted, and the effect on the impermeability of waterproof sheet that the changes of pore structure had was analyzed. The results show that when the difference of pore sizes is great, the largest pore will control the material impermeability. 60 µm in diameter is the inflection point of the relationship between the diameter and the number of the pores. When the pore diameter is in the range between 20 µm and 80 µm, an approximately log linear decline trend between the diameter and the number of the pores will appear. Middle and large pores have much effect on the porosity of the material. Porosity and pore connectivity can be used as the key indexes to the impermeability evaluation of waterproof sheet.
- © 2018, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Qingguo Wang AU - Qixin Yang PY - 2018/02 DA - 2018/02 TI - Identification of Pore Structure of Waterproof Sheet in Underground Engineering Based on Micro-CT Technology BT - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017) PB - Atlantis Press SP - 64 EP - 69 SN - 2352-5401 UR - https://doi.org/10.2991/ifeesm-17.2018.13 DO - 10.2991/ifeesm-17.2018.13 ID - Wang2018/02 ER -