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| Determination of specific gravity of bentonite based on the interlamellar hydration model |
| ZHU Zancheng1，2，SUN Dean2，LI Chenghong3，QIU Zhanhong2，LI Lin2 |
| (1. Department of Civil Engineering，Shanghai University，Shanghai 200072，China；2. School of Civil Engineering and Architecture，Taizhou University，Taizhou，Zhejiang 318000，China；3. School of Pharmaceutical and Chemical Engineering，Taizhou University，Taizhou，Zhejiang 318000，China) |
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Abstract According to the interlamellar hydration model of montmorillonite proposed by Forslind，an equation is established for predicting the specific gravity of montmorillonite at the end of the hydration process. When the solvent is pure water in measuring the specific gravity，the larger the total specific surface area and thickness of interlamellar hydration layers of bentonite are，the greater the specific gravity of bentonite is. The interlayer thicknesses of calcium bentonite from Gaomiaozi with different initial water contents and saturated using ethylene glycol were determined with the X-ray diffraction and were approximately the same. By comparing the measured and predicted values of the specific gravity of sand and bentonite using pure water and kerosene respectively，it was found that the solvent influenced the specific gravity of bentonite. The measured specific gravity using pure water is larger than that using the kerosene，which verified the rationality of the proposed formula.
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2016, Vol. 35 
