Modelling the Influence of Waste Rubber on Compressive Strength of Concrete by Artificial Neural Networks

Hadzima-Nyarko, Marijana; Nyarko, Emmanuel Karlo; Ademović, Naida; Miličević, Ivana; Šipoš, Tanja Kalman

doi:10.3390/ma12040561

Cited by 54 publications

(24 citation statements)

References 50 publications

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“…The reuse of rubber in concrete results in two major opposing effects: an enhancement in durability and a reduction in mechanical strength [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Replacing more than 25% of fine aggregates with rubber crumb caused the compressive strength of concrete to drop significantly [5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

et al. 2020

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The reuse of rubber in concrete results in two major opposing effects: an enhancement in durability and a reduction in mechanical strength. In order to strengthen the mechanical properties of rubber concrete, steel fibers were added in this research. The compressive strength, the four-point bending strength, the mass loss rate, and the relative dynamic elastic modulus of steel fiber reinforced rubber concrete, subjected to cyclic freezing and thawing, were tested. The effects of the content of steel fibers on the freeze–thaw resistance are discussed. The microstructure damage was captured and analyzed by Industrial Computed Tomography (ICT) scanning. Results show that the addition of 2.0% steel fibers can increase the compressive strength of rubber concrete by 26.6% if there is no freeze–thaw effect, but the strengthening effect disappears when subjected to cyclic freeze–thaw. The enhancement of steel fibers on the four-point bending strength is effective under cyclic freeze–thaw. The effect of steel fibers is positive on the mass loss rate but negative on the relative dynamic elastic modulus.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

et al. 2020

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“…The devulcanization of ELT rubber in autoclave [36] or in a co-rotating twin screw extruder [37] allows obtaining reclaimed rubber with superior characteristics. Partial or full replacement of aggregate in concrete with waste rubber has become possible [38]. All of these non-combustion methods seem to be less dangerous from an environmental point of view.…”

Section: Discussionmentioning

confidence: 99%

End of Life Tires as a Possible Source of Toxic Substances Emission in the Process of Combustion

et al. 2019

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Several million tons of end of life tires (ELTs) are piled annually as a result of human activities. Various methods have been proposed for the extraction and recycling of the resource potential of ELTs. The chemical composition of ELTs seems to enable their usage as a fuel after mechanical separation of a steel cord. Indeed, in the rubber of ELTs, up to 90 mass% accounts for carbon and hydrogen. Currently, it is by incineration that a significant proportion of ELTs is utilized. However, ELTs contain not only sulfur, which is used for vulcanization, but also nitrogen-containing additives. The behavior of these heteroatoms during oxidation is poorly investigated. It has been shown that the pyrolysis liquid fuel obtained from ELTs contains such sulfur compounds as mercaptans and nitrogen in the form of hydrocyanic acid and cyanogen. Deep oxidation of ELTs results in the oxidation of sulfur compounds to dioxide, but the oxidation products have been found to contain traces of cyanogen. Taking this into account, one should pay attention to the ways of transforming heteroatoms during the process of ELT oxidation and the products of ELT pyrolysis as potential sources of highly toxic gas emissions.

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“…However, common high strength concretes are very brittle and have low tensile capacities (Song and Hwang, 2004). The use of CR in normal and high strength concretes has been found to enhance the deformability and reduce the brittleness significantly but with a reduction in compressive strength (Youssf et al, 2016;Hadzima-Nyarko et al, 2019). Following are findings of research on the use of waste tire rubber (CR and PR) in ECC.…”

Section: Compressive Strengthmentioning

confidence: 98%

“…The ever increasing global environmental challenge posed by the disposal of solid wastes particularly used and discarded tires has attracted the interest of researchers to focus on finding alternative ways of positively exploiting the menace (Chen and Lee, 2019;Sofi, 2018;Li et al, 2019;Al-Fakih et al, 2019;Mohammed et al, 2012;2018d;Al-Fakih et al, 2018). The use of crumb rubber (CR) obtained from waste tires as a sustainable construction material is among the feasible ways of safely getting rid of the problem (Mohammed, 2010;Mohammed and Adamu, 2018;Youssf et al, 2019;Hadzima-Nyarko et al, 2019). Discarded waste tires pose a threat to humans due to their potential to serve as a breeding place for mosquitoes and rodents that are vectors of numerous types of diseases (Mohammed et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

A review of the effect of waste tire rubber on the properties of ECC

Abdulkadir¹

2020

Int. j. adv. appl. sci.

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Due to the growing concern over the adverse effect and threat posed by waste tire all over the world, researchers have over the last two decades focused attention on the use of rubber obtained from the waste tire in the form of crumb rubber (CR) or powdered rubber (PR) as a construction material by incorporating it in cementitious composites. Although there exists a lot of research on the use of CR/PR in cementitious composites, the only literature reviews available are on rubberized mortars and concrete but not on engineered cementitious composites (ECC). This paper aims at contributing towards filling this gap by reviewing relevant research works on the use of CR/PR in ECC. The effect of the tire rubber addition on the properties of the composite in fresh and hardened states have been comprehensively reported. The results revealed that the incorporation of tire rubber in ECC enhances the tensile ductility but negatively affects the compressive strength.

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Modelling the Influence of Waste Rubber on Compressive Strength of Concrete by Artificial Neural Networks

Cited by 54 publications

References 50 publications

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

End of Life Tires as a Possible Source of Toxic Substances Emission in the Process of Combustion

A review of the effect of waste tire rubber on the properties of ECC

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