Dynamic compressive properties of lightweight rubberized concrete

Pham, Thong M.; Chen, Wensu; Khan, Abdul Muktadir; Elchalakani, Mohamed; Tran, Trung Dinh

doi:10.1016/j.conbuildmat.2019.117705

Cited by 82 publications

(42 citation statements)

References 47 publications

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“…During the past decades, multiple techniques have been tried by researchers to develop consensus and encouragement of reuse of scrape-tyres in building construction and in rubber manufacturing industries [4,5]. The development of rubberized concrete is one such material that has offered numerous benefits and applications due to its improved mechanical performance and high sustainability [6,7]. Besides, the concept of rubber aerogel has shown excellent sound and thermal insulation abilities thereby resulting in effective and efficient recycling of waste tyres [8].…”

Section: Introductionmentioning

confidence: 99%

Impact of Length and Percent Dosage of Recycled Steel Fibers on the Mechanical Properties of Concrete

et al. 2021

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The global rapid increase in waste tyres accumulation, as well as the looming social and environmental concerns, have become major threats in recent times. The use of Recycled Steel Fiber (RSF) extracted from waste tyres in fiber reinforced concrete can be of great profitable engineering applications however the choice of suitable length and volume fractions of RSF is presently the key challenge that requires research exploration. The present experimental work aims at investigating the influence of varying lengths (7.62 and 10.16 cm) and dosages (1, 1.5, 2, 2.5, 3, 3.5, and 4%) of RSF on the various mechanical properties and durability of concrete. Test results revealed that the varying lengths and dosages of RSF significantly affect the mechanical properties of concrete. The improvements in the compressive strength, splitting tensile strength, and Modulus of Rupture (MOR) of RSF reinforced concrete observed were about 26, 70, and 63%, respectively. Moreover, the RSF reinforced concrete showed an increase of about 20 and 15% in the yield load and ultimate load-carrying capacity, respectively. The durability test results showed a greater loss in compressive strength and modulus of elasticity and a smaller loss in concrete mass of SFRC. Based on the experimental findings of this study, the optimum dosages of RSF as 2.5 and 2% for the lengths 7.62 and 10.16 cm lengths, respectively are recommended for production of structural concrete. Doi: 10.28991/cej-2021-03091750 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Impact of Length and Percent Dosage of Recycled Steel Fibers on the Mechanical Properties of Concrete

et al. 2021

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“…A number of studies have reported an enhancement in energy dissipation and damping caused by the increase in rubber content [45][46][47][48][49][50][51][52][53][54]. On the other hand, there are limited studies on the influence of strain rates on rubberised concrete [55][56][57]. Due to its hyperelastic nature, rubber is expected to be highly sensitive to strain rates, with significant increase in strength with higher rates.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its hyperelastic nature, rubber is expected to be highly sensitive to strain rates, with significant increase in strength with higher rates. Tests under compression at strain rates above 1×10 -2 have typically shown that the dynamic increase factors (DIF) for RuC, represented by dynamic-to-static strength ratios, are within those of CCM [55,57], whilst splitting tests have shown that the DIF for RuC are about two folds those of CCM [56,58].…”

Section: Introductionmentioning

confidence: 99%

Cyclic stress–strain rate-dependent response of rubberised concrete

Bompa

Elghazouli

2020

Construction and Building Materials

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This paper presents an experimental investigation into the constitutive response of rubberised concrete materials under monotonic and cyclic compression. After describing the test specimens and experimental arrangement, a detailed account of the stress-strain response of rubberised concrete materials, as well as their reference high strength conventional concrete, is given. The volumetric rubber content is varied between 0 and 40% of both fine and coarse aggregates. Both monotonic and cyclic loading conditions are considered for comparison, and three strain rate levels, simulating static, moderate and severe seismic action, are examined. The increase in rubber content is shown to have a detrimental effect on the stiffness and strength, as expected. However, with the increase in rubber content, rubberised concrete materials are shown to exhibit improved compressive recovery under cyclic loading, coupled with a higher energy accumulation rate, enhanced inter-cycle stability and lower inter-cycle degradation. It is also shown that the increase in strain rate, from static to severe seismic, leads to a notable increase in the stiffness and strength, with these enhancements becoming less significant with the increase in rubber content. Based on the results and observations, expressions for determining the unloading stiffness and residual strain, as a function of rubber content and strain rate, are proposed within the ranges considered. The suggested relationships enable the characterisation of rubberised concrete materials within widely used cyclic constitutive models.

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“…Research on the dynamic compressive strength of rubberized concrete is still limited when compared to that of traditional concrete. 5,[35][36][37] Existing studies of dynamic properties of rubberized concrete used a split Hopkinson pressure bar (SHPB) and considered four rubberized concrete mixes, which, respectively, contained a 5%, 10%, 15%, and 20% replacement of natural aggregates with rubber crumbs. Yang et al 36 used rubber crumb sizes ranging from 1 to 5 mm while the average rubber aggregate size in the study by Liu et al 35 was 2 mm.…”

Section: Quasi-static and Dynamic Properties Of Rucmentioning

confidence: 99%

Effect of rubber aggregate size on static and dynamic compressive properties of rubberized concrete

Pham

Renaud

Pang

et al. 2021

Structural Concrete

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This study experimentally examines the effect of rubber aggregate size on the static and dynamic behavior of rubberized concrete. Rubberized concrete specimens were prepared with different maximum rubber aggregate sizes ranging from 1 to 3 mm to 3 to 5 mm while the rubber content was kept constant at 15% by volume. The dynamic compressive behavior of rubberized concrete was investigated by using split Hopkinson pressure bar (SHPB) tests. The experimental results have shown that rubberized concrete with smaller rubber aggregates showed higher static compressive strength as compared to that with larger rubber aggregates. Meanwhile, the rubber aggregate size did not considerably affect the density of rubberized concrete. The use of smaller rubber aggregate size mitigated the slump reduction of rubberized concrete. Rubberized concrete exhibited obvious sensitivity to strain rate and those with larger rubber aggregates showed higher strain rate sensitivity. The progressive damage of rubberized concrete showed more ductile behavior with bulging failure, which was different from the typical concrete under compression. In general, the use of smaller rubber aggregate size was beneficial to the static compressive strength but less effective to the dynamic compressive strength of rubberized concrete as compared to those with larger rubber aggregates.

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Dynamic compressive properties of lightweight rubberized concrete

Cited by 82 publications

References 47 publications

Impact of Length and Percent Dosage of Recycled Steel Fibers on the Mechanical Properties of Concrete

Impact of Length and Percent Dosage of Recycled Steel Fibers on the Mechanical Properties of Concrete

Cyclic stress–strain rate-dependent response of rubberised concrete

Effect of rubber aggregate size on static and dynamic compressive properties of rubberized concrete

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