Sewage Waste (SW) and Industrial Furnace Waste (IFW) as Cement and Sand Replacement in Ultra-High Performance Concrete
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Department of Civil and Environmental Engineering(MPE), Islamic University of Technology(IUT), Board Bazar, Gazipur-1704, Bangladesh
Abstract
Ultra-High-Performance Concrete (UHPC) production involves high energy and material
consumption because of cement, silica fume, and fine quartz sand. Therefore, this study
presents an approach to UHPC that is more sustainable by substituting silica fume partially
with Sewage Waste (SW) and also replacing sand with Industrial Furnace Waste (IFW). Both
are wastes from industries-SW from wastewater treatment plants, and IFW from steelmaking
industries-thus usable in the minimization of environmental burdens as well as CO₂ emissions
besides enhancing waste valorization.
Nine trial mixes and six SW-IFW incorporated UHPC mixes were prepared, cast, and tested
for workability, compressive strength, water absorption, sorptivity, and shrinkage tests as per
ASTM standards. The SW and IFW percentages composition were from o to 20% SW as a
replacement of silica fume and from o to 5o% IFW as sand replacement respectively. Results
indicated that moderate substitution levels maintained UHPC-grade compressive strength (over
120 MPa) with the possibility of reduction of up to 25% embodied CO₂ emissions. Higher
replacement ratios negatively influence flowability and early age strength due to increased
porosity and altered hydration kinetics.
The findings show that incorporating SW and IFW into UHPC not only achieves high strength
and durability but also promotes environmental sustainability through waste reuse and carbon
reduction. The research validates SW-IFW-UHPC as a feasible, eco-efficient alternative for
next-generation structural materials.
Description
Supervised by
Dr. Tanvir Ahmed,
Assistant Professor,
Department of Civil and Environmental Engineering (CEE)
Islamic University of Technology (IUT)
Board Bazar, Gazipur, Bangladesh
This thesis is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Civil and Environmental Engineering, 2025
Citation
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