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Effectiveness of sewage sludge ash combined with waste pozzolanic minerals in developing sustainable construction material: An alternative approach for waste management

Title
Effectiveness of sewage sludge ash combined with waste pozzolanic minerals in developing sustainable construction material: An alternative approach for waste management
Author
조병완
Keywords
Sewage sludge ash; Mortar; Cementitious materials; Alkali activation; Waste management
Issue Date
2017-06
Publisher
ELSEVIER SCI LTD
Citation
JOURNAL OF CLEANER PRODUCTION, v. 153, no. 1, page. 253-263
Abstract
Utilization of the sewage sludge ash in fabricating the construction material would be an effective alternative approach under the sludge management scheme other than landfilling. The present investigation deals with the utilization of the recycled sewage sludge ash (SSA) combined with the quicklime (QL) and blast furnace slag (BFS) as a cementitious material in controlling the physical and mechanical performances of mortar. The mortar samples were prepared using the different amount of SSA, QL, BFS, and alkali activator (AA). The performance of the sewage sludge ash based mortar (SAM) was evaluated measuring the bulk density, apparent porosity, compressive strength, flexural strength, and shrinkage strain, etc. The result reveals that the higher dose of AA (50% weight w.r.t the volume of water used) and QL (20% w.r.t weight of the total cementitious material) influences the mechanical strength of SAM. Additionally, the optimum dose of the BFS (10% w.r.t. weight of the total cementitious material) leads to yield a maximum compressive strength (31.3 MPa) of SAM. Finally, based on the analytical analysis, a model has been proposed to explain the overall performance of the SAM. Hence, the utilization of SSA (70%) combined with QL (20%) and BFS (10%) for the fabrication of mortar and concrete is assumed to be an effective alternative technique in developing sustainable construction material and waste management as well. (C) 2017 Published by Elsevier Ltd.
URI
https://www.sciencedirect.com/science/article/pii/S0959652617304948?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114537
ISSN
0959-6526; 1879-1786
DOI
10.1016/j.jclepro.2017.03.059
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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