Salt damage/Ground deformation Mechanism and its repair method using porous ceramic particles made from paper sludge

众所周知，盐岩层广泛沉积在欧亚大陆的基底之下。地下水含有微弱的盐分，盐岩层偶尔会沉积在地表附近。这样的典型例子在泰国东北部地区随处可见。由于咸化的地下水位逐渐上升，导致地面出现盐晶，并伴随着雨季和旱季的年复一年的重复，农业生产力下降。这一研究项目旨在开发一种数值计算技术，以揭示导致荒漠化的盐害机制。另一方面，造纸业排放的造纸污泥造成了严重的环境问题。通过在1300度的温度下焚烧，这种污泥可以变成多孔稳定的陶瓷材料。本研究项目还旨在利用这类材料来保护和修复盐害。

It is well known that salt rock layer is widely deposited under the Eurasian basement. Underground water contains weakly salt where the salt rock layer is occasionally deposited near the ground surface. Such a typical example can be seen in the northeast area of Thailand. Agricultural productivity decreases due to the salt damage of that the salty ground water level gradually rises resulting in appearance of salt crystals on the ground surface associated with annual repeat of rainy and dry seasons. This research project is intended to develop a numerical computation technique to reveal the mechanism of salt damage which will lead desertification. On the other hand, paper sludge discharged from paper manufacture causes a serious environmental problem. Such sludge can be changed to porous stable ceramic materials by burning it at 1300 degrees. This research project also aims at utilizing such materials to protect and repair the salt damage.