𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Surface fractal dimension of bentonite and its application to determination of swelling properties

✍ Scribed by Y.F. Xu; De’an Sun; Yangping Yao

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
193 KB
Volume
19
Category
Article
ISSN
0960-0779

No coin nor oath required. For personal study only.

✦ Synopsis

Bentonite with a low hydraulic conductivity is often used as engineered barriers to prevent groundwater contamination by leachate from the nuclear waste. When bentonite is immersed into the water solution, swelling deformation and swelling pressure will occur to create a tight contact with confining rock. The swelling deformation and swelling pressure are proportional to the amount of water volume absorbed by bentonite. The water volume absorbed by bentonite is related to its surface fractality. The correlation of the normalized water volume by bentonite volume (V w =V m ) to vertical overburden pressure (p) is obtained as V w =V m ¼ Kp DsÀ3 , which presents a method to determine the surface fractal dimension of bentonite using the swelling tests. The surface fractal dimensions (D s ) of Wyoming bentonite and Tsukinuno bentonite are 2.64, 2.65, respectively obtained from the swelling tests. The surface fractal dimension of bentonite can be used to estimate the maximum swelling strain and swelling pressure in the disposal system of nuclear waste.

📜 SIMILAR VOLUMES

A new method to calculate the fractal di
A new method to calculate the fractal dimension of surfaces: application to human cell proliferation
✍ M. Bigerelle; A. Iost 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 1003 KB

This paper presents a new method of calculating the fractal dimension of surfaces as well as a correction method which improved the results. To test its efficiency, the algorithms have been applied to stochastic surfaces of mathematical functions with known fractal dimensions and compared with the o

Swelling and Mechanical Properties of a
Swelling and Mechanical Properties of a Temperature-Sensitive Dextran Hydrogel and its Bioseparation Applications
✍ Jing Dong; Li Chen; Yamei Ding; Weijun Han 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 143 KB

## Abstract **Summary:** A series of temperature‐sensitive dextran hydrogels (poly(NIPA‐__co__‐GMA‐Dex)) were synthesized by the copolymerization of glycidyl methacrylate‐derivatized dextran (GMA‐Dex) and __N__‐isopropylacrylamide (NIPA) in aqueous solution. Their swelling and mechanical properties