Potential use of rubber as aggregate in structural reinforced concrete element – A review

Strukar, Kristina; Šipoš, Tanja Kalman; Miličević, Ivana; Bušić, Robert

doi:10.1016/j.engstruct.2019.03.031

Cited by 142 publications

(62 citation statements)

References 56 publications

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“…The rubber particles consisted of six size ranges: 0-0.5 mm, 0.5-0.8 mm, 1.0-2.5 mm, 2-4 mm, 4-10 mm and 10-20 mm. These represented 5%, 15%, 20%, 10% and 45% of the total added rubber blend, respectively, and were chosen following a detailed mix optimisation procedure in which a balance between workability and strength loss was sought [2]. The specific gravity of rubber was 1.1, and the fineness modulus of the rubber blend was 4.90.…”

Section: Concrete Materialsmentioning

confidence: 99%

“…The potential benefits of rubberised concrete (RuC) compared with conventional concrete materials (CCMs) were highlighted in various recent investigations [1]. These studies indicated that RuC possesses enhanced ductility, energy absorption, durability and sound insulation, as well as lower unit weight in comparison with CCM [2]. In contrast, the partial replacement of mineral aggregates with rubber particles had a detrimental effect on the fresh and mechanical properties, particularly in terms of the reduction in elastic modulus as well as the compressive and tensile strengths [3].…”

Section: Introductionmentioning

confidence: 99%

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Confinement effects for rubberised concrete in tubular steel cross-sections under combined loading

Mujdeci

Bompa

Elghazouli

2021

Archiv.Civ.Mech.Eng

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This paper describes an experimental investigation into confinement effects provided by circular tubular sections to rubberised concrete materials under combined loading. The tests include specimens with 0%, 30% and 60% rubber replacement of mineral aggregates by volume. After describing the experimental arrangements and specimen details, the results of bending and eccentric compression tests are presented, together with complementary axial compression tests on stub-column samples. Tests on hollow steel specimens are also included for comparison purposes. Particular focus is given to assessing the confinement effects in the infill concrete as well as their influence on the axial–bending cross-section strength interaction. The results show that whilst the capacity is reduced with the increase in the rubber replacement ratio, an enhanced confinement action is obtained for high rubber content concrete compared with conventional materials. Test measurements by means of digital image correlation techniques show that the confinement in axial compression and the neutral axis position under combined loading depend on the rubber content. Analytical procedures for determining the capacity of rubberised concrete infilled cross-sections are also considered based on the test results as well as those from a collated database and then compared with available recommendations. Rubber content-dependent modification factors are proposed to provide more realistic representations of the axial and flexural cross-section capacities. The test results and observations are used, in conjunction with a number of analytical assessments, to highlight the main parameters influencing the behaviour and to propose simplified expressions for determining the cross-section strength under combined compression and bending.

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Section: Concrete Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Confinement effects for rubberised concrete in tubular steel cross-sections under combined loading

Mujdeci

Bompa

Elghazouli

2021

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

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“…The minimum the difference is the maximum will be the polymer‐filler interaction. [ 1,3,21,48 ] Figure 6D shows the delta stress of the samples before and after hydration. It can be inferred that the WC40 and WC20SG40 samples both before and after hydration have a good polymer‐filler interaction.…”

Section: Resultsmentioning

confidence: 99%

“…Comparable to cement, fly ash (FA), and slag (SG), which are industrial wastes (by‐products) also possess cementing properties due to the presence of the cementitious phases, calcium silicate (CS), and calcium silicate hydrate (CSH). [ 1–7,8–10 ] Owing to such properties, these industrial wastes are presently being utilized in various construction sites as expedient substitutes. [ 3,5–7,11 ]…”

Section: Introductionmentioning

confidence: 99%

“…The cement industry also utilizes these by‐products in bulk for making various types of cements such as portland pozzolana cement (PPC) and portland slag cement (PSC), since both SG and FA can trigger setting properties in a synergistic way thereby reducing the cost of the cement. Thus, SG and FA have gained the attention of many researchers and engineers working in the domain of construction materials [1,12–15 . ] The researchers have focused primarily on minimizing the waste SG and FA by developing advanced composites.…”

Section: Introductionmentioning

confidence: 99%

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Controlling the mechanoadaptive properties of hydrogenated nitrile rubber by the incorporation of cementious based industrial waste for downhole application

et al. 2020

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This work aims to develop smart stimuli responsive composites utilizing hydrogenated nitrile rubber (HNBR), fly ash (FA), and slag (SG) with white cement (WC). HNBR has been chosen by capitalizing its unique attributes of high temperature performance and high oil resistance as the matrix and coining the synergistic setting characteristics of FA and SG as industrial wastes with WC. The composites displayed synergism in mechanical and thermal properties. The calcium-rich phases of FA and SG, entice the postpolymerization modification of the rubber matrix in conjunction with cement serving as reactive fillers. The changes of modulus (50 MPa), mass (7%), volume (8%), and hardness were observed upon repeated wet-dry cycles. These are attributed to the ionic interactions between the modified polymer matrix and cementitious phases as a result of postpolymerization conversion. These smart composite materials could be used for sealing and microfluidic valves for the downhole applications in oil field industries.

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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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Potential use of rubber as aggregate in structural reinforced concrete element – A review

Cited by 142 publications

References 56 publications

Confinement effects for rubberised concrete in tubular steel cross-sections under combined loading

Confinement effects for rubberised concrete in tubular steel cross-sections under combined loading

Controlling the mechanoadaptive properties of hydrogenated nitrile rubber by the incorporation of cementious based industrial waste for downhole application

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

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