Strength properties of cemented-pastebackil materials mixed with mining wastes

• Main Author: Pabilona, Wincent Nicole K.
• Format: text
• Language: English
• Published: Animo Repository 2015
• Subjects: Controlled low-strength materials; Tailings (Metallurgy); Structural Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/6778
• Institution: De La Salle University

The use of cemented paste backfill is an increasingly important component of underground mining operations and is becoming a standard practice for use in many cut-and-fill mines around the world. Billions of tons of tailing wastes derived from mining remains as wastes forever. Utilizing cemented-paste backfill mixed with aggregate quarry waste can be used as a method of tailing disposal since the supply of aggregate quarry waste is quite abundant and its disposal has always been a problem. Studies with regards to the applicability of cemented-paste backfill materials mixed with mine wastes instead of sand or known as the cemented-paste tailing backfill (CPTB) are limited. This study determines the applicability of cemented-paste backfill materials mixed with aggregate quarry wastes locally known as banlik as ground support to concrete structures like footings or retaining walls. The mixture is called cemented-paste tailing backfill (CPTB) . Strength properties such as compressive strength, shear strength, and angle of friction was determined. The undrained shear strength and unconfined compressive strength at various curing time was determined using unconfined compressive test. Also, the stress-strain interface behavior between the cemented-paste backfill and concrete structure was investigated vi using direct shear test. Chemical composition was obtained using SEM/EDX analysis performed by DLSU-Physics Department. The prediction of stressstrain interface behavior of CTPB was formulated using modified hyperbolic model.