EVALUATION OF FACTORS AFFECTING THE UNCONFINED COMPRESSIVE STRENGTH OF CHEMICALLY IMPROVED SOIL

Abstract

 The port and airport facilities constructed on the landfill sites whose ground is usually contains large particles such as gravel and shell fragments. Because, the strength of the chemically improved soil decreases with larger soil particles, it is important to identify the factors that influence the strength development of the improved soil in order to develop the strength for such materials. Because, the homogel strength of the chemical solution for liquefaction countermeasures used in recent years is considerably lower than before, it was unclear whether the previous research results could be applied. Therefore, in this study, the factors affecting strength development were confirmed by measuring the pore water pressure generated inside the specimen during the unconfined compression test. From the test results, it was found that the unconfined compressive strength of the chemically improved soil consists of two strengths caused by the adhesive force of the soil particles and the generated negative pore water pressure. It was also observed that the surface area of the soil particles, the internal friction angle and the negative pore water pressure during loading affect the unconfined compressive strength.