Hyperbolic model parameters of Philippine coal ash

• Main Authors: Uy, Erica Elice S., Dungca, Jonathan Rivera
• Format: text
• Published: Animo Repository 2018
• Subjects: Coal ash; Roads—Embankments; Waste products as building materials; Civil and Environmental Engineering; Civil Engineering
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/2763
• Institution: De La Salle University

In the 2016 Annual Energy Sector accomplishment report of the Philippine's Department of Energy, power generation in the Philippines relied on the coal-fired power plant at 46%. An increase of 19.47% was observed from 2003 to 2016. The increase in demand would result in an increase in production of waste material from the power plant namely, coal ash. Furthermore, the disposal of these waste materials can be an issue because it can cause a shortage in storage facilities. To address this, there is a need to study on the possibility of reusing these waste materials. A probable use of the waste material is by using it as a construction material for road embankments. In the Philippines some of these structures are constructed on areas exposed to seawater in order to address traffic congestion. This study proposes to use coal ash as the material for road embankment. Triaxial test under consolidated drained condition was performed considering the exposure to seawater. Three conditions were implemented namely, no exposure, immediate exposure and prolonged exposure. Based on the results, 100% fly ash had the highest strength. The hyperbolic model was employed to simulate the material's stress-strain response. The hyperbolic model was chosen since it has the capability of predicting the load-displacement behavior of the waste material under monotonic loading. The Hyperbolic model prediction shows that the material can still handle higher stresses. With this, the ash mixtures tested has a potential to be used as a construction material for a road embankment. © Int. J. of GEOMATE.