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The foundation of constructions built in the permafrost areas undergo considerable creeping or thawing deformation because of the underlying ice-rich permafrost. Soil improvement may be of advantage in treating ice-rich permafrost at shallow depth. Sulphoaluminate cement was a potential material to improve frozen soil. Simultaneously, two other cements, ordinary Portland cement and Magnesium phosphate cement were selected as the comparison. The mechanical behavior of modified frozen soil was studied with thaw compression tests and uncon

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Bi Fold Repairs - Save Money and Keep Your Home Secure If your bifold doors are difficult to open or let in drafts, it's likely that the hardware has degenerated. It needs repairing. If you don't take care of these issues, it could result in a huge repair bill. Wear and tear is a major issue for all bi-fold doors whether they are solid or glazed. Regular maintenance can help prevent the damage. Locks Bi fold doors are stunning and functional design elements for any home. But, just like any other door or window