SOLIDIFYING MATERIAL FOR WATER-CONTAINING SOIL AND SOLIDIFICATION AND IMPROVEMENT OF WATER-CONTAINING SOIL

摘要

PROBLEM TO BE SOLVED: To obtain the subject solidifying material exhibiting excellent performance for the solidification and improvement of water-containing soil by adding a specific amount of cement as a strengthening agent to gypsum. SOLUTION: This solidifying material is composed of (A) 2-8 pts.wt. (based on 1,00 pts.wt. of the total solidifying material) of cement and (B) the remaining part of gypsum. The component A is especially preferably alumina cement owing to its low alkali content and the component B is preferably hemihydrate gypsum. The solidifying material is preferably further incorporated with 0.5-10 pts.wt. of carboxymethyl cellulose and further with porous inorganic water- absorbent or organic polymer water-absorbent. The solidifying material produced by this process gives solidified and improved soil having pH of 6-9 which is suitable for planting and an unconfined compressive strength of >=0.5 kgf/cm to allow the walk of a worker on the soil.