| Autor: |
Keng, J. C. W., Morita, H., Ramia, N. T. |
| Zdroj: |
Soil Science Society of America Journal; March 1985, Vol. 49 Issue: 2 p289-293, 5p |
| Abstrakt: |
The effect of the cryoprotective property of dimethyl sulfoxide (DMSO) on soil pore structure during freeze‐drying was examined in the laboratory. Undisturbed heavy clay soil cores (75 mm high and 75 mm in diameter) were saturated with 0%, 10%, 28% and 35% H2O‐DMSO solution before freeze‐drying. Shrinkage measurements, mercury intrusion determinations, and scanning electron microscope (SEM) examinations were performed to study the effects of DMSO on soil structure. Shrinkage results suggest that the shape of soil samples has the greatest effect on directional shrinkage. Freeze‐drying caused thermal cracks which belies the true volume shrinkage. Mercury intrusion data and SEM photographs indicate that DMSO treatments alter the pore size distributions. The most interesting discovery in this experiment was, for this particular soil, that pores in the range of 10 nm to 102nm seem most susceptible to compaction caused by ice crystal formation. |
| Databáze: |
Supplemental Index |
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