Abstract
Portland cement concrete is fragile in tension and it has numerous negative impacts on the environment. To deal with these issues, both fiber reinforcement and recycled materials can be utilized to manufacture sustainable and ductile concrete. In this study, the synergistic effects of high-performance mineral admixture silica fume and glass fiber reinforcement were investigated on the hardened properties of RC. For this purpose, two concrete mix families, namely, NC and RC were prepared. To understand the benefits of synergistic utilization of glass fiber and silica fume, in both NC and RC, 0.5% glass fiber was incorporated with three different levels of silica fume. i.e., 0%, 5%, and 10%. Both strength and permeability-related durability properties were investigated. Results revealed that combined incorporation of 0.5% fiber and 10% silica fume can help in the production of RC having better mechanical and durability performance compared to reference “NC”. Simultaneous incorporation of silica fume and glass fiber produces a combined effect greater than their individual effects on both mechanical and permeability properties of concrete. Silica fume plays a very dominant and positive role in the development of CS, WA, and CIPR of RC, whereas glass fiber plays a vital role in upgrading STS and FS of RC and whereas, with the addition of 0.5% glass fiber, RC can yield 8–9 times higher flexural toughness than that of the plain NC.
Highlights
Many countries are suffering acute shortages of waste disposal sites to accommodate solid wastes generated during the demolition and construction activities
These findings showed no clear trend about how much loss in compressive strength (CS) is expected studies was about 17%, which is closer to CS loss experienced in the present study
The Splitting Tensile Strength (STS) loss reported in this study was compared withwas thatcompared reported with reported in 11 studies, see studies, Figure 6.the
Summary
Many countries are suffering acute shortages of waste disposal sites to accommodate solid wastes generated during the demolition and construction activities. This issue is severe in many developing countries where rapid urbanization has increased construction and demolition wastes (CDWs) over the past few years. CDWs can be transformed into recycled aggregates (RA) employing an appropriate crushing method. This practice saves humans from different troubles ensuring eco-friendly disposal of solid wastes and it relieves natural resources from the distress of constant depletion. Researchers have reported successful applications of RA in different structures, i.e., concrete pavements and buildings [2,3]. Another study [4,5] showed that RA is suitable for steel-reinforced structural applications, i.e., beams and columns
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