A Comparative Study on the Flexural Behaviour of Rubberized and Hybrid Rubberized Reinforced Concrete Beams

Alasmari, H; Bakar, B.H. Abu; Noaman, Ahmed Tareq

doi:10.28991/cej-2019-03091311

Cited by 11 publications

(8 citation statements)

References 24 publications

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“…S4 in the additional supporting information). This value is comparable with the flexural strength of conventional concrete (Sayhood et al 2018;Alasmari et al 2019;Awoyera et al 2019), and thus ensures that the packaged system can withstand the external physical stress. In turn, the cultural relics are safeguarded during the extraction process.…”

Section: Resultsmentioning

confidence: 55%

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

et al. 2020

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The flexible sponge/epoxy composite can wrap underwater artefacts in any shape and forms a protective shell after curing, thus effectively wrapping and reinforcing the artefacts. However, the hydroscopicity of the sponge itself limits the underwater application of the sponge/epoxy composite. In this study, a novel polyurethane sponge was prepared by modified with super‐hydrophobic multi‐wall carbon nanotubes (SH‐MWCNTs@PU sponge). Compared with the pristine PU sponge, the water‐contact angle on the surface of SH‐MWCNTs@PU sponges increased from 103.3 ± 1.82 to 152.6 ± 1.54o, and oily epoxy resin was able to cover the surface completely. The study shows that when SH‐MWCNTs@PU sponges/epoxy resin composite material is used underwater, it prevents both water from entering the sponge and also the inside epoxy resin from overflowing into the water. Moreover, the composite materials have excellent toughness after reinforcement under water (flexural strength = 3.56 MPa) and the soft sponges can be moulded to wrap any type of underwater artefacts. In the laboratory, when taking a broken, three‐dimensional blue‐and‐white porcelain pot as a research subject, the entire retrieval process—temporary stabilization, packaging, extraction and reinforcement material removal—was simulated to evaluate systematically all the technological aspects of safely excavating fragile underwater relics.

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Section: Resultsmentioning

confidence: 55%

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

et al. 2020

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“…Some layered structures can be named as hybrid concrete with different materials inserted in each layer controlling the reduction of load capacity due to the concentration of waste material. Authors in [17] conducted comparative studies of the rubberized and hybrid rubberized concrete with double-layer reinforced concrete beams. At the top layer rubberized reinforcement concrete was placed with sand replacement of 10%, 12.5%, and 15% by CR, while at the bottom normal reinforcement concrete was used.…”

Section: Introductionmentioning

confidence: 99%

Influence of Crumb Rubber and Recycled Steel Fibers on Hybrid Layered Reinforced Concrete Columns under Compression Load

Alasmari

2024

Eng. Technol. Appl. Sci. Res.

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Waste tires pose an environmental issue that causes health problems when discarded by either land burial or burning. The current study investigated the properties and characteristics of different-length hybrid layered columns of Recycled Steel Fibers (RSF) at a fixed ratio (0.6%) of the volume fraction with utilized fixed content (15%) of Crumb Rubber (CR). Nine square column specimens were prepared and tested under axial compression load to reveal the effect of RSF and CR content on hybrid layered reinforcement columns. The results revealed that as the RSF content increased concrete’s properties were enhanced. However, the inclusion of CR at the top layer resulted in performance reduction. Additionally, the layered structure with CR and RSF has higher characteristic properties, including higher load capacity and displacement. Moreover, adding 0.6% RSF to both layers and CR at the top led to a 120% increase in the toughness of the concrete loading capacity. This was followed by a reasonable improvement in displacement and ductility.

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“…Since it requires fewer natural resources to produce concrete and eliminates used tires, using scrap tire rubber in concrete has been an interesting topic [1] since 2003, and more research has been done on recycling used tire rubber for incorporation into concrete. The effectiveness of incorporating or removing coarse or/and fine aggregate in concrete using different rubber ratios has been investigated in several studies [2,3,4]. Waste tire rubber can improve concrete's structural properties, such as its capacity to withstand repeated freezing and thawing, energy dissipation, deformability, and impact resistance.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Rubber-Filled Reinforced Concrete Beams Strengthening with CFRP Sheets

Adday,

Ali

2023

E3S Web Conf.

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Although there are many advantages to using rubber to produce reinforced concrete substrates, there are still few applications for rubberized concrete substrates like beams, where the mechanical properties of rubber-infused concrete, such as flexural strength, begin to decline. On the other hand, flexural strengthening constitutes a sizeable portion of the structural uses for externally carbon fiber reinforced polymer (CFRP) sheets when used to strengthen reinforced concrete beams. For this study's rubberized concrete beams, the externally adhered (CFRP) sheets were used as a substitute for the loss of flexural strength. The study's reinforced concrete beams were split into two groups, each consisting of three beams. The first group's concrete mixture was included as a filler (5) % of the cement weight in the form of waste tire rubber with a size not more than (0.075) mm. Any group of concrete beams always had a first beam without any external reinforcement, a second beam with one layer, and a third beam with two layers of (CFRP) sheet. The results indicate that the load at the first crack increases to be equal to that of the un-rubberized beam when the rubberized reinforced concrete beam is strengthened with one layer of (CFRP) sheets, and it increases by (20%) when reinforced with two layers of (CFRP) sheets. When reinforced with one or two layers, the load at failure rises by 23.58 and 42.75 percent, respectively. The first crack deflection rises by 88.11 and 120.24 percent, while the failure deflection falls by 2.97 and 6.01 percent, respectively. On the (load-deflection) curve, the deflection decreases at symmetrical loads.

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A Comparative Study on the Flexural Behaviour of Rubberized and Hybrid Rubberized Reinforced Concrete Beams

Cited by 11 publications

References 24 publications

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

Temporary consolidation and packaging of fragile cultural relics at underwater archaeological sites to maintain their original state during extraction

Influence of Crumb Rubber and Recycled Steel Fibers on Hybrid Layered Reinforced Concrete Columns under Compression Load

Flexural Behavior of Rubber-Filled Reinforced Concrete Beams Strengthening with CFRP Sheets

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