A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Wood Ash-Based Low-Carbon Cementitious Composites
Concrete is a huge emitter of CO2. About 900 kg of CO2 is emitted to produce 1000 kg of cement, concrete’s main ingredient. To reduce the carbon footprint of cement, supplementary cementitious materials (SCM) are adopted as a partial replacement. Coal fly ash is a popularly used SCM to replace cement in concrete; however, coal industries are being shut down globally because of the negative environmental impact, resulting in the scarcity of coal fly ash. Wood ash, a byproduct of bioenergy found in abundance in the timber-based construction industry in western Canada, has the potential to serve as a substitute for coal fly ash. Including wood ash in concrete solves the disposal issue of the abundant wood ash produced as well. This study evaluates the performance of wood ash-based cementitious composites considering their compressive strength and setting time results. There are two types of ash produced from burning wood, wood fly ash (WFA) and wood bottom ash (WBA). Being the finer ash, WFA replaced cement, and the coarser WBA replaced sand at 15, 30, 45%, and 15, 30% levels, respectively. It was observed that the combination of 15% WFA and 15% WBA provided a comparable result with the reference mortar based on the compressive strength.
Wood Ash-Based Low-Carbon Cementitious Composites
Concrete is a huge emitter of CO2. About 900 kg of CO2 is emitted to produce 1000 kg of cement, concrete’s main ingredient. To reduce the carbon footprint of cement, supplementary cementitious materials (SCM) are adopted as a partial replacement. Coal fly ash is a popularly used SCM to replace cement in concrete; however, coal industries are being shut down globally because of the negative environmental impact, resulting in the scarcity of coal fly ash. Wood ash, a byproduct of bioenergy found in abundance in the timber-based construction industry in western Canada, has the potential to serve as a substitute for coal fly ash. Including wood ash in concrete solves the disposal issue of the abundant wood ash produced as well. This study evaluates the performance of wood ash-based cementitious composites considering their compressive strength and setting time results. There are two types of ash produced from burning wood, wood fly ash (WFA) and wood bottom ash (WBA). Being the finer ash, WFA replaced cement, and the coarser WBA replaced sand at 15, 30, 45%, and 15, 30% levels, respectively. It was observed that the combination of 15% WFA and 15% WBA provided a comparable result with the reference mortar based on the compressive strength.
Wood Ash-Based Low-Carbon Cementitious Composites
Lecture Notes in Civil Engineering
Alam, M. Shahria (editor) / Hasan, G. M. Jahid (editor) / Billah, A. H. M. Muntasir (editor) / Islam, Kamrul (editor) / Rumman, Rubaiya (author) / Kamal, Meraj Rubayat (author) / Bediwy, Ahmed Gaber (author) / Alam, M. Shahria (author)
International Conference on Advances in Civil Infrastructure and Construction Materials ; 2023 ; Dhaka, Bangladesh
2024-08-22
11 pages
Article/Chapter (Book)
Electronic Resource
English
Supplementary cementitious material , Wood fly ash , Wood bottom ash , Cementitious composites , Compressive strength , Setting time Engineering , Construction Management , Geotechnical Engineering & Applied Earth Sciences , Structural Materials , Building Construction and Design , Geoengineering, Foundations, Hydraulics
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