Effect of Waste Plastic Shreds on Bond Resistance between Concrete and Steel Reinforcement

Osifala, K B; Salau, Musbau Ajibade; Adeniyi, A

doi:10.1088/1757-899x/96/1/012051

Cited by 3 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following the crushing of the particle, mechanical interlocking was reduced. Osifala, Salau, and Adeniyi (2015) found that RILEM specimens with the addition of plastic shreds failed by slipping, and RILEM specimens without the addition of plastic failed by splitting. All concrete specimens failed by splitting in this study, as shown in Figure 15, the splitting failure mode of all 12 test specimens after failure following the push-out testing.…”

Section: Steel-concrete Bondmentioning

confidence: 99%

Effects of waste plastics as partial fine-aggregate replacement for reinforced low-carbon concrete pavements

Tota-Maharaj

Adeleke

Nounu

2022

International Journal of Sustainable Engineering

View full text Add to dashboard Cite

Using waste plastics as a partial natural aggregate replacement and monitoring strength and workability reduction in pavement structures is vital to net-carbon zero. This study explores the utilisation of waste plastic as a fine aggregate replacement in medium-strength reinforced concrete pavements, for improving plastic aggregate performance and the intrinsic reasoning for observed strength performance. Various weight fractions of fines were substituted by the same weight of plastic aggregates ranging from 5-15% according to the appropriate standards (Eurocodes and British Standards). The physical and mechanical properties of the composites were analysed. The results indicated that the use of polymeric materials as a partial replacement for fines contributed to a decrease in workability, compressive strength and push-out bond between steel reinforcement and concrete. Despite these trends, 5% replacement of fine aggregates with plastic waste surpassed all the feasibility criteria. Furthermore, using 10% of plastic replacement by weight was deemed feasible in non-structural applications such as roads, pavements, and facades. The outputs have demonstrated environmental engineering concepts in tackling plastic waste, providing an alternative to conventional aggregate. Environmental benefits can arise due to the removal of potentially hazardous plastics from entering ecosystems as well as minimising dredging of global sand reserves.

show abstract

Section: Steel-concrete Bondmentioning

confidence: 99%

Effects of waste plastics as partial fine-aggregate replacement for reinforced low-carbon concrete pavements

Tota-Maharaj

Adeleke

Nounu

2022

International Journal of Sustainable Engineering

View full text Add to dashboard Cite

show abstract

“…__________________________________________________________________________________________________ 2017/20 39 bond strength of coated bars [5]. Waste aluminium and steel shreds have also been found to increase the cube and bond strength of concrete with uncoated bars [6]. The effect of transverse reinforcement on the behaviour of lap spliced steel in tension zone are reported in [7].…”

Section: Construction Sciencementioning

confidence: 99%

“…The steel stress developed in each beam determined from equation (6) was substituted in equation (8) to obtain τt.…”

mentioning

confidence: 99%

Influence of Stirrups on Overlap Splice Strength of Epoxy Coated Deformed Bars

Osifala¹,

Akeju²

2017

Construction Science

View full text Add to dashboard Cite

This paper reports the effect of transverse reinforcement on tensile reinforcement splice strength of epoxy coated reinforcing bars. Thirty six (36) full size beams of varying lengths and sectional dimensions with lap spliced bars in constant moment region were cast and tested in a four point bending system. The beams were cast with three high yield diameter bars, namely 16 mm, 20 mm and 28 mm. 8 mm and 10 mm diameter high yield stirrups were introduced over the lap in an attempt to study the effect of stirrups on bond performance of epoxy coated reinforcing bars. The ultimate moment from the tests were used to determine the stress developed in the steel rods. The ratios of the test bond stresses and bond stress values using the tensile reinforcement yield stress τt/τy were used for comparison of the parameter under investigation. Transverse reinforcement was found to increase the splice strength of epoxy coated reinforcing bars and the larger the diameter of stirrup the better the improvement of the bond efficiency.

show abstract

“…The higher the fibre contents the higher was the obtained bond strength. Rostasy & Hartwich [2] as well as Osifala et al [5] performed direct pull-out tests and Dancygier et al [3] undertook flexural and direct pull-out tests that showed that fibres do not influence the rebar-matrix bond strength in a positive manner. Osifala et al [5] and Dancygier et al [3] even show a negative impact of the micro-reinforcement on the bond strength [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fibres on the Rebar - Concrete Bond: Further Evidence of Toughness Enhancement

Goffin¹

2018

CERJ

View full text Add to dashboard Cite

The bond between the rebar and the surrounding concrete plays a substantial role in the mechanical performance of a reinforced concrete member due to the stress transfer that occurs at the aforementioned interface. In this study direct rebar pull out tests were performed at different concrete maturities, fibre contents and fibre materials. PET fibres that have a lower energy requirement during production and improved properties in comparison to polypropylene were used and their performance compared to steel fibres. The addition of fibres leads to a more ductile failure during pull-out. The improved energy absorption capacity is particularly important under seismic loading. Interestingly, a small amount of fibres is enough to notably improve the post-failure behaviour by reducing the softening slope of the stress-slip curve. An increase in fibre content beyond 0.1% for PET fibres does not improve the post-failure behaviour any further. However, steel fibres continue to improve the post-peak behaviour. Thus, the effect of steel fibres is more significant compared to PET fibres and the most pronounced at a high concrete maturity. An analytical model describing the bond stress slip response is proposed and matches the experimental observations well.

show abstract

Effect of Waste Plastic Shreds on Bond Resistance between Concrete and Steel Reinforcement

Cited by 3 publications

References 2 publications

Effects of waste plastics as partial fine-aggregate replacement for reinforced low-carbon concrete pavements

Effects of waste plastics as partial fine-aggregate replacement for reinforced low-carbon concrete pavements

Influence of Stirrups on Overlap Splice Strength of Epoxy Coated Deformed Bars

Influence of Fibres on the Rebar - Concrete Bond: Further Evidence of Toughness Enhancement

Contact Info

Product

Resources

About