Enhancing Reinforced Concrete Beams: Investigating Steel Dust as a Cement Substitute

Infrastructures, Journal Year: 2023, Volume and Issue: 8(11), P. 157 - 157

Published: Oct. 31, 2023

This research undertook an extensive examination of the ramifications integrating steel dust as a partial substitute for cement within reinforced concrete beams. The investigation encompassed assessment various facets, encompassing workability mixture, alongside crucial mechanical properties such compressive strength, split tensile flexural ultrasonic pulse velocity (UPV), and elasticity modulus. findings unveiled notable reduction in proportion increased with consequential substantial impact on Notably, strength exhibited enhancement at 10% replacement yet decline higher degrees substitution. inclusion led to formulation adjusted equations pertaining characteristics mixture. Remarkably, incorporation yielded increase ductility. Conversely, 30% level, ductility diminished maximum load-bearing capacity. In light these findings, it is imperative exercise prudence when considering utilization substitute, particularly approaching or exceeding level threshold. Further comprehensive acquire understanding its implications susceptibility potential corrosion concerns.

Language: Английский

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Performance-based engineering: formulating sustainable concrete with sawdust and steel fiber for superior mechanical properties

Frontiers in Materials, Journal Year: 2024, Volume and Issue: 11

Published: Sept. 11, 2024

Construction using eco-friendly materials reduces environmental impact and promotes sustainable practices. This research uses sawdust steel fibers to design concrete. The main goal is improve mechanical properties reduce embodied carbon emissions. study examines the of concrete with different fiber combinations fill a gap in literature. In this synergistic effect saw dust on characteristics have been studied. also these pairings’ benefits. used response surface methodology (RSM) an experimental program assess effects input variables (sawdust percentages) output responses like compressive strength (CS), split tensile (STS), flexural (FS), modulus elasticity (MOE), (EC), eco-strength efficiency (ESE). Established testing methodologies RSM provided optimum prediction model based specimen properties. Sawdust enhances concrete’s Varying proportions both were added mix; (0%–12%) (0%–2%). findings suggest that optimized composition achieved following properties: 13.85 MPa strength, 1.4 3.67 18.027 GPa elasticity, 211.272 kg CO2e/m3 carbon, 0.065487 efficiency. showed aims improving reducing achieved. As per multi-objective optimization, optimal percentages are 11.81% 0.063% respectively. investigation yielded many suggestions. To test blend ecologically friendly real-world building projects, start realistic projects. Finally, life cycle evaluations cost studies needed determine economic impacts compared standard options.

Language: Английский

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Bending performance of dapped-end beams having web opening: Experimental and numerical investigation

Structures, Journal Year: 2023, Volume and Issue: 48, P. 736 - 753

Published: Jan. 5, 2023

Language: Английский

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Shear strength of functionally graded self-compacting concrete deep beams reinforced with steel and GFRP bars

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 18, P. e01872 - e01872

Published: Jan. 20, 2023

Glass fiber-reinforced polymer (GFRP) bars are emerging as a potential replacement for steel rebars due to their vulnerability corrosion. However, the shear behavior of GFRP is not well established, especially in functionally graded self-compacting concrete (SCC) deep beams reinforced with hybrid (GFRP and steel). This article experimentally explores high-strength SCC having tension reinforcement. A total fourteen were prepared varying reinforcement ratios fiber volume fractions. There three groups beams: (i) plain (i.e., no fibers) beams, (ii) (FRSCC) 0.6 % 1.2 fibers, (iii) beams. The functional grading was achieved by casting two layers, first layer lower two-thirds depth fibers second without fibers. deficient tested flexure. resistance compared full test results reveal significance system rebars, which found effectively improve structural capacity increase load required initiate cracking. In addition, mixing enhanced beam 15–23 37–39 influenced use using only. model developed assessing incorporating dowel action longitudinal reinforcing bars. study indicates that provided comparable same area.

Language: Английский

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Impact of Fine Slag Aggregates on the Final Durability of Coal Bottom Ash to Produce Sustainable Concrete

Sustainability, Journal Year: 2023, Volume and Issue: 15(7), P. 6076 - 6076

Published: March 31, 2023

In the current investigation is presented prospective substitution of cement and fine aggregates with slag material (Alccofine 1203) coal bottom ash, respectively. The was carried out in two steps, viz. Phase I II. I, a control mix designed basic ingredients concrete, then were partially replaced five percentages (10%, 20%, 30%, 40% 50%) ash (CBA). To improve characteristics concrete mixtures, ultra-fine material, i.e., Alccofine 1203 (an innovative low calcium silicate, which offers reduced water demand depending upon performance) used as partial replacement cement. II, inspected effect replacing 5%, 10%, 15% 20% Alccofine, containing on properties such workability, compressive strength, split tensile flexural pulse velocity, rapid chloride penetration along microstructural analysis using SEM studied. It concluded from cost that achieved high-strength an 8.14% increase compared to increase. significance this work lies fact we by industrial waste, combination inclusion About 58% improvement strength recorded for mix.

Language: Английский

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