Use of dry mixing method in fly ash based geopolymer as a stabilizer for dredged soil

• Main Authors: Ang, Kimberly D., Isaac, Aila Mae L., Joven, John Joshua R., Sollano, Ma. Beatrice T.
• Format: text
• Language: English
• Published: Animo Repository 2016
• Subjects: Soils > Quality > Philippines > Mindanao Island; Fly ash > Philippines > Mindanao Island; Civil Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/8933
• Institution: De La Salle University

In this study the researchers aims to improve the properties of dredged soil obtained from a river beside a coal fired power plant in Mindanao. The researchers would be using different percentages namely 10%, 20%, 30% of fly ash based geopolymer using dry mixing method were studied to determine the optimum mix. The dredged soil was treated with varying percentages of fly ash based geopolymer were studied. The procedures based on the ASTM standards were conducted to determine the index properties namely grain size distribution curve (ASTM D422), specific gravity (ASTM D854), Atterberg's limits (D4318), and CBR test (ASTM D1833) and UCS test (ASTM D2166) of untreated soil. While only the California bearing ratio test and UCS test were conducted on the treated soil. The experimental results showed that the fly ash based geopolymer improved both the CBR index and unconfined compression strength of the dredged soil. The optimum mix for the soil-geopolymer mix was 30% because it displayed the largest increase in the CBR index (50.23%) and unconfined compressive strength (912.88 Kpa).