Optimisation of rubberised concrete with high rubber content: An experimental investigation

Raffoul, Samar; Garcia, Reyes; Pilakoutas, Kypros; Guadagnini, Maurizio; Medina, Nelson Flores

doi:10.1016/j.conbuildmat.2016.07.054

Cited by 213 publications

(113 citation statements)

References 60 publications

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“…These are referred to throughout the paper as R20, R40 and R60, respectively. The optimisation studies carried out on these mixes [2] showed that the mechanical properties are significantly influenced by the coarse rubber properties, whilst the fine rubber has adverse effects on workability. Silica fume and fly ash, primarily added to improve workability, segregation and slump, and to optimise the particle packing of the mixture, improved strength and concrete flowability [2].…”

Section: Proportionsmentioning

confidence: 99%

“…The optimisation studies carried out on these mixes [2] showed that the mechanical properties are significantly influenced by the coarse rubber properties, whilst the fine rubber has adverse effects on workability. Silica fume and fly ash, primarily added to improve workability, segregation and slump, and to optimise the particle packing of the mixture, improved strength and concrete flowability [2]. One-third of the quantity of admixtures added to improve workability, as depicted in Table 3, was plasticisers [56], whilst the other two-thirds were super-plasticisers [57].…”

Section: Proportionsmentioning

confidence: 99%

“…The mix proportions were identified following an optimisation study within a wider research project [2,55] and further analysed elsewhere by the authors [4] in terms of mechanical properties and complete stress-strain response. The rubberised concrete mix details depicted in Table 3 were designed from a reference normal aggregate (non-rubberised) concrete mix (R00) with a water-tobinder ratio of 0.35.…”

Section: Proportionsmentioning

confidence: 99%

“…The mechanical properties of rubberised concrete have therefore been investigated in many previous studies, with particular focus on the compressive strength properties [e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In order to use such modified concrete materials in structural applications there is, however, a need for a reliable characterisation of the bond interaction with the embedded reinforcement bars.…”

Section: Introductionmentioning

confidence: 99%

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Bond-slip response of deformed bars in rubberised concrete

Bompa

Elghazouli

2017

Construction and Building Materials

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This paper is concerned with examining the complete bond-slip behaviour between deformed reinforcement bars and concrete incorporating rubber particles from recycled tyres as partial replacement for mineral aggregates. An experimental study consisting of fifty-four pull-out tests on cylindrical rubberised and normal concrete specimens, in conjunction with two reinforcement sizes with short embedment lengths, is described. In addition to a detailed assessment of the full bondslip relationship, the test results offer a direct interpretation of bond behaviour under practical levels of confinement and its influence on the failure modes. Particular emphasis is given to the characteristic bond behaviour of rubberised concrete in terms of maximum bond strength and splitting strength as well bond stiffness and slip parameters. The detailed test measurements and observations provided in this study enable the definition of key bond parameters depicting the interfacial behaviour between rubberised concrete and deformed bars. The findings also permit the development of modified approaches for reliable representation of the failure modes and bond capacities for the concrete materials considered in this investigation.

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Section: Proportionsmentioning

confidence: 99%

Section: Proportionsmentioning

confidence: 99%

Section: Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bond-slip response of deformed bars in rubberised concrete

Bompa

Elghazouli

2017

Construction and Building Materials

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“…In another study aiming to reduce the expansion caused by alkali-silica reactions, for samples having 16% rubber, there were determined a decrease in 43% ratio in the alkali-silica reaction expansion [12]. As a result of these studies it was determined that compressive strength, bending strength, tensile splitting strength and elasticity module properties of rubber aggregate added concretes decrease, but energy absorption capacity and ductility property of them increase [1,[5][6][7]9,[13][14][15]. As a result of microstructural examinations preformed on the samples prepared with such concretes, it was observed that the decrease in strength was based on the poor adherence between the rubber aggregate and concrete paste [4,14].…”

Section: Introductionmentioning

confidence: 99%

Physical Characteristics of Rubberized Concrete Including Granulated Waste Tire Aggregate

Bideci¹,

Saka²,

Bideci³

2017

Journal of Polytechnic

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Bu makaleye şu şekilde atıfta bulunabilirsiniz (To cite to this article): Sallı Bideci Ö., Saka R. C. and Bideci A., "Physical characteristics of rubberized concrete including granulated waste tire aggregate, Politeknik Dergisi, 20(4): 777-786, (2017). Politeknik Dergisi, 2017; 20 (4) : 777-786 Journal of Polytechnic, 2017; 20 (4) ABSTRACTEvery year hundreds of millions of tyres come out as waste because they fill their service period and this situation causes global problems in respect of health and environment. Today, as the natural building sand became a limited and costly material, and fine aggregate is more economical and sustainable, this lead to the usage of fine aggregate in concrete technology. In this study, rubber granule aggregate (CRA) obtained from waste tyres with 0% (control), 5%, 10% and 15% ratios by weight was replaced with the amount of fine aggregate which remains at 1-2 mm sieve opening, and mechanical and morphological properties of the samples were investigated. For this purpose, unit weight, water absorption, compressive strength for 3,7 and 28 days, freezing-thawing (100 cycles) and ultrasonic pulse tests of concrete samples were performed. Also, SEM (Scanning Electron Microscope) images and EDS (Energy-Dispersive X-ray Spectroscopy) spectrum analyses of samples were examined. As a result of the study, it was determined that the sample containing CRA with 5% ratio gave more suitable results than the other samples.Keywords: Aggregates/recycled aggregates, concrete, concrete technology, construction materials, size effect. Granüle Atık Lastik Agregası İçeren Kauçuk Betonunun Fiziksel Özellikleri ÖZHer yıl yüz milyonlarca araç lastiği servis süresini doldurması nedeniyle atık olarak ortaya çıkmakta, bu durum sağlık ve çevre açısından küresel sorunlara neden olmaktadır. Günümüzde doğal inşaat kumunun az bulunan ve daha maliyetli bir malzeme haline gelmesi, doğal kuma göre daha ekonomik, sürdürülebilir olması beton teknolojisinde ince agrega olarak kullanımının yolunu açmıştır. Bu çalışmada, atık lastiklerden elde edilen kauçuk granül agrega (CRA), beton karışım dizaynında ince agreganın 1-2 mm elek aralığında kalan miktarına ağırlıkça %0 (Kontrol), %5, %10 ve %15 oranlarında ikame edilmiş ve numunelerin mekanik ve morfolojik özellikleri araştırılmıştır. Bu amaçla beton numunelerinin; birim ağırlık, su emme, 3, 7 ve 28 günlük basınç dayanımları, donma-çözünme (100 çevrim) ve ultrases deneyleri yapılmıştır. Ayrıca, numunelerin SEM (ScanningElectronMicroscope) görüntüleri ve EDS spektrum analizleri incelenmiştir. Çalışmanın sonucunda, %5 oranında CRA içeren numunenin diğer numunelere göre dahauygun sonuçlar verdiği belirlenmiştir.

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Structural performance of composite steel rubberised concrete members under combined loading conditions

2021

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This paper investigates the structural behaviour of rubberised concrete‐filled steel tubular (RuCFST) members under a wide range of axial‐bending loading conditions. The results of an experimental programme on circular concrete‐filled steel tubes (CFST), incorporating conventional and rubberised concrete (RuC) materials with various rubber content ratios, are presented. After describing the specimen details and testing arrangements, the influence of the RuC infill on the behaviour of test members in terms of moment‐axial interaction and ductility, is examined. The test results show that whilst the cross‐sectional capacity of RuCFST members is reduced with the increase in rubber content, significantly higher ductility is obtained compared with conventional counterparts. An enhancement of about 85% in ductility is obtained for members with 60% rubber content compared to those with conventional concrete. Finally, the test results are compared with current design guidelines, indicating that the latter tend to overestimate the capacity, particularly for relatively high rubber contents.

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Optimisation of rubberised concrete with high rubber content: An experimental investigation

Cited by 213 publications

References 60 publications

Bond-slip response of deformed bars in rubberised concrete

Bond-slip response of deformed bars in rubberised concrete

Physical Characteristics of Rubberized Concrete Including Granulated Waste Tire Aggregate

Structural performance of composite steel rubberised concrete members under combined loading conditions

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