2018 年 3 巻 p. 129-134
The authors have developed a new recycling method for high water content mud which is called “Fiber-Cement-Stabilized Soil method”. In this method, paper debris (fragments of old paper) and solidification material are mixed with mud to produce modified soils. The modified soils have several features such as large failure strength, large failure strain, and high durability in wetting and drying condition. However, recently, as the price of old paper is increasing, development of new fiber materials which can substitute for paper debris is strongly desired. In this study, the applicability of gypsum board paper to Fiber-Cement-Stabilized Soil method was investigated. The board paper was cut into small pieces with the same size of conventional paper debris, and they were used to produce modified soils. As a result, modified soils using board paper only did not have enough failure strength compared to modified soils produced by using conventional paper debris. However, when the board paper and paper debris were used together to improve the sludge, the amount of paper debris was reduced to a half of the amount used in conventional Fiber-Cement-Stabilized Soil method to get enough failure strength.
