TY - JOUR
T1 - Heat Generation and Accumulation from Industrial Wastes in Landfills
AU - Jafari, Navid H.
AU - Nazari, Murad
AU - Nandakumar, Krishnaswamy
AU - Saghayezhian, Mohammad
N1 - Publisher Copyright:
© 2020 American Society of Civil Engineers.
PY - 2020
Y1 - 2020
N2 - Disposal of high-water content sludge wastes can pose problems in landfill operations due to trafficability of compaction equipment, long-term slope stability, and generation of odors. As sludge wastes become increasingly solidified with binding agents, such as cements and fly ashes to improve strength characteristics, the corresponding hydration process of calcium oxide generates heat. The study presents the use bench-scale semi-adiabatic tests to estimate the time required for the heat to dissipate from solidified sludge waste stockpiles. Calorimeters used in hydration testing were made from Dewar flasks which greatly minimizes heat loss to the environment. Heat loss to the environment was estimated using resistor wires. Semi-adiabatic test results are converted to adiabatic time temperature curves using the heat loss estimated from the calorimeter. Materials used in the study include various industrial sludge wastes and ashes. Heat generation of ash and waste mixtures at various ash to waste ratios were performed. A numerical model was developed to estimate the period of heat loss in waste stockpiles so it can be safely landfilled. Climate data was incorporated as boundary conditions in the numerical model.
AB - Disposal of high-water content sludge wastes can pose problems in landfill operations due to trafficability of compaction equipment, long-term slope stability, and generation of odors. As sludge wastes become increasingly solidified with binding agents, such as cements and fly ashes to improve strength characteristics, the corresponding hydration process of calcium oxide generates heat. The study presents the use bench-scale semi-adiabatic tests to estimate the time required for the heat to dissipate from solidified sludge waste stockpiles. Calorimeters used in hydration testing were made from Dewar flasks which greatly minimizes heat loss to the environment. Heat loss to the environment was estimated using resistor wires. Semi-adiabatic test results are converted to adiabatic time temperature curves using the heat loss estimated from the calorimeter. Materials used in the study include various industrial sludge wastes and ashes. Heat generation of ash and waste mixtures at various ash to waste ratios were performed. A numerical model was developed to estimate the period of heat loss in waste stockpiles so it can be safely landfilled. Climate data was incorporated as boundary conditions in the numerical model.
UR - http://www.scopus.com/inward/record.url?scp=85081980758&partnerID=8YFLogxK
U2 - 10.1061/9780784482827.026
DO - 10.1061/9780784482827.026
M3 - 会议文章
AN - SCOPUS:85081980758
SN - 0895-0563
VL - 2020-February
SP - 232
EP - 239
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
IS - GSP 319
T2 - Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics
Y2 - 25 February 2020 through 28 February 2020
ER -