TY - GEN
T1 - Utilization of Sewage Sludge Ash in Self-Compacted Concrete
AU - Shanti, Siham Al
AU - El-Dieb, Amr
AU - Maraqa, Munjed A.
N1 - Funding Information:
and technician in conducting the work is very much appreciated. The authors would like to thank ASTM Project Grant Award 2019 and the ACI Foundation - ACI Middle East Fellowship 2020-2021 awarded to the M.Sc. student.
Funding Information:
The UAEU-UPAR Research Grant #31N377 provided funding for this study. The authors would like to thank Al Saad Wastewater Treatment Plant in Al Ain, UAE, for providing sewage sludge samples. The help of the Concrete Lab engineer
Publisher Copyright:
© 2021, Avestia Publishing, Switzerland. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Rapid urbanization throughout the world resulted in a considerable amount of sewage sludge, which is commonly considered a great environmental concern. Also, the rapid growth of self-compacting concrete (SCC) marks a significant milestone in enhancing the construction industry's effectiveness. Hence, an experimental program was carried out to study self-compacting concrete (SCC) properties incorporating sewage sludge ash (SSA) as a partial replacement of cement. Mixes were prepared with two percentages (0 and 20% by mass) of SSA as partial replacement of cement. The slump flow, T50 flow time, J-ring, and V-funnel were evaluated for the fresh SCC. Hardened properties of SCC were assessed by measuring compressive strength, rapid chloride penetration, bulk electrical resistivity, water absorption rate (i.e., sorptivity), and water permeability. Test results indicated that SCC made with SSA must incorporate a higher dosage of admixtures than the control mix to achieve satisfactory workability, passing ability, and viscosity. SSA contributed to the concrete mix's late strength development and led to durable concrete with a low chloride permeability resistance and a high electrical resistivity. There was a negligible increase in the rate of water absorption and water permeability. However, the water absorption rate and permeability are expected to reduce with age due to the pozzolanic reaction of SSA. SSA was found to have the potential to be used as partial cement replacement in making SCC, which could lead to a profound impact on solid waste management and sustainable development in the construction industry.
AB - Rapid urbanization throughout the world resulted in a considerable amount of sewage sludge, which is commonly considered a great environmental concern. Also, the rapid growth of self-compacting concrete (SCC) marks a significant milestone in enhancing the construction industry's effectiveness. Hence, an experimental program was carried out to study self-compacting concrete (SCC) properties incorporating sewage sludge ash (SSA) as a partial replacement of cement. Mixes were prepared with two percentages (0 and 20% by mass) of SSA as partial replacement of cement. The slump flow, T50 flow time, J-ring, and V-funnel were evaluated for the fresh SCC. Hardened properties of SCC were assessed by measuring compressive strength, rapid chloride penetration, bulk electrical resistivity, water absorption rate (i.e., sorptivity), and water permeability. Test results indicated that SCC made with SSA must incorporate a higher dosage of admixtures than the control mix to achieve satisfactory workability, passing ability, and viscosity. SSA contributed to the concrete mix's late strength development and led to durable concrete with a low chloride permeability resistance and a high electrical resistivity. There was a negligible increase in the rate of water absorption and water permeability. However, the water absorption rate and permeability are expected to reduce with age due to the pozzolanic reaction of SSA. SSA was found to have the potential to be used as partial cement replacement in making SCC, which could lead to a profound impact on solid waste management and sustainable development in the construction industry.
KW - Durability
KW - Fresh Stage
KW - Hardened Stage
KW - Self-Compacted Concrete
KW - Sewage Sludge Ash
KW - Sustainability
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U2 - 10.11159/iccste21.126
DO - 10.11159/iccste21.126
M3 - Conference contribution
AN - SCOPUS:85123418598
SN - 9781927877845
T3 - International Conference on Civil, Structural and Transportation Engineering
BT - Proceedings of the 6th International Conference On Civil Structural and Transportation Engineering, ICCSTE 2021
PB - Avestia Publishing
T2 - 6th International Conference On Civil Structural and Transportation Engineering, ICCSTE 2021
Y2 - 17 May 2021 through 19 May 2021
ER -