TY - JOUR
T1 - Improving circular economy by assessing the use of fly ash as a replacement of lime pastes reducing its environmental impact
AU - Saldarriaga, Juan F.
AU - Gaviria, Ximena
AU - Gene, Jorge M.
AU - Aguado, Roberto
N1 - Funding Information:
This work was carried out with financial support from the Department of Civil and Environmental Engineering at Universidad de los Andes. The authors thank the laboratory technicians of the Department of Civil and Environmental Engineering, for their support in the development of the tests. Thanks to the microscopy center ??core at the Universidad de los Andes.
Funding Information:
This work was carried out with financial support from the Department of Civil and Environmental Engineering at Universidad de los Andes. The authors thank the laboratory technicians of the Department of Civil and Environmental Engineering, for their support in the development of the tests. Thanks to the microscopy center μ·core at the Universidad de los Andes.
Publisher Copyright:
© 2022 The Institution of Chemical Engineers
PY - 2022/3
Y1 - 2022/3
N2 - In this work, bituminous coal, sugar cane, untreated and pretreated hazardous waste ashes are tested as supplementary cement materials, analyzing their reactivity in lime pastes prepared according to ASTM C–305, using a 0.5 water/lime ratio. The hydration process was stopped with acetone at the ages of 1, 3, 7, 14, 28, 56, 90 and 180 d. Mineral phases were determined by thermogravimetry, XRD, and SEM finding high contents of SiO2 and Al2O3 in the coal and sugarcane ashes, while in the hazardous waste ashes low contents of these oxides were found. Samples of sugarcane and untreated hazardous waste ashes seems to be attractive to be used as substitutes in the production of construction supplies. In addition to this, an E-factor analysis was carried out, which showed that carrying out fly ash replacements in any quantity contributes to the circular economy of all the economic activities involved. Reducing the amount of solid waste to be disposed of and improving the local and regional environmental quality.
AB - In this work, bituminous coal, sugar cane, untreated and pretreated hazardous waste ashes are tested as supplementary cement materials, analyzing their reactivity in lime pastes prepared according to ASTM C–305, using a 0.5 water/lime ratio. The hydration process was stopped with acetone at the ages of 1, 3, 7, 14, 28, 56, 90 and 180 d. Mineral phases were determined by thermogravimetry, XRD, and SEM finding high contents of SiO2 and Al2O3 in the coal and sugarcane ashes, while in the hazardous waste ashes low contents of these oxides were found. Samples of sugarcane and untreated hazardous waste ashes seems to be attractive to be used as substitutes in the production of construction supplies. In addition to this, an E-factor analysis was carried out, which showed that carrying out fly ash replacements in any quantity contributes to the circular economy of all the economic activities involved. Reducing the amount of solid waste to be disposed of and improving the local and regional environmental quality.
KW - Circular economy
KW - Fly ashes
KW - Lime paste
KW - Reactivity
KW - Waste
UR - http://www.scopus.com/inward/record.url?scp=85123919683&partnerID=8YFLogxK
U2 - 10.1016/j.psep.2022.01.074
DO - 10.1016/j.psep.2022.01.074
M3 - Artículo
AN - SCOPUS:85123919683
SN - 0957-5820
VL - 159
SP - 1008
EP - 1018
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
ER -
