Performance of high strength concrete containing recycled rubber

Abdelmonem, Ayman; El-Feky, M.S.; Nasr, El-Sayed A.R.; Kohail, Mohamed

doi:10.1016/j.conbuildmat.2019.08.041

Cited by 144 publications

(50 citation statements)

References 49 publications

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“…Compressive strength values after 7 and 28 days are shown in Figure 4. These results are in accordance with a previous study of Abdelmonem et al (2019), which showed a decreasing compressive strength with an increasing rubber aggregate content. As shown in Figure 4, the 28-day compressive strength of concrete reduces by 25% when 10% of coarse aggregate is replaced with rubber aggregate.…”

Section: Optimum Percentage Of Rubber Replacementsupporting

confidence: 93%

“…In addition, the deformability of the rubber aggregates themselves compared to the surrounding cementitious matrix causes cracks to initiate in concrete under loading (Khatib and Bayomy, 1999). A study by Abdelmonem et al (2019) showed a reduction of strength from 65 MPa to 35 MPa when 30% of rubber aggregates were used in high strength concrete. The study of Raffoul et al (2016) showed that the strength further reduces as the particle size of recycled tire aggregates increases.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete

et al. 2020

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Studies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This study investigates the effect of the surface treatment of waste tire rubber as coarse aggregates with different oxidizing solutions and different treatment durations on the mechanical, durability and thermal properties of concrete. The properties of concrete incorporated with 8% rubber coarse aggregates (by volume of natural aggregates) which were treated with three different solutions: water (H 2 O), 20% sodium hydroxide (NaOH) and 5% calcium hypochlorite [Ca(ClO) 2 ] (both as% weight of water) for durations of 2, 24, and 72 h, respectively. The effect of these treatments on the compressive strength, splitting tensile strength, water permeability, thermal conductivity and diffusivity of concrete was investigated. Results show that Ca(ClO)2 has a more positive effect on the strength and permeability compared to NaOH solution and water. Experimental results were statistically analyzed using ANOVA and Post Hoc tests. The analyses showed that the improvement of concrete strength is only significant when the treatment with NaOH and Ca(ClO) 2 is prolonged to 72 h. Furthermore, the microstructural analysis of concrete showed that the improvement in the strength is due to the improved bonding between cement paste and rubber aggregates as a result of surface treatment. This microstructural improvement also resulted in lower water permeability of concrete. However, the thermal conductivity and diffusivity increased when the surface treatment duration increases as there are less air voids in the samples. This study shows that, with appropriate pretreatment, a certain percentage of natural aggregates can be safely replaced with waste tire rubber aggregates while maintaining sufficient quality of the resulting concrete.

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Section: Optimum Percentage Of Rubber Replacementsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete

et al. 2020

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“…After the age of 45 days, compressive strength begins to decrease for the reference concrete and concrete RC10%, there is a loss of 10.7% for the reference concrete against a loss of 7.6% for concrete RC10%, and between the ages of 45 and 180 days. Boukour and Benmalek [10] and Abdelmonem et al [1] noted similar results in similar works. On the other hand, for RC17.5% and RC25% rubber concretes, the compressive strength continues to increase.…”

Section: Compressive Strengthsupporting

confidence: 71%

Contribution to the Study of the Durability of Rubberized Concrete in Aggressive Environments

Kechkar¹,

Belachia²,

Cherait³

2020

Civil and Environmental Engineering Reports

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Today, much of the world’s waste, in particular used tires, is accumulating as a potential source of major environmental and economic problems. In order to better preserve the environment, and in the face of changes in the legislation in force, many recovery actions have been carried out especially in the field of building materials.The present research aims to contribute to the study of the mechanical properties and durability of concretes based on rubber aggregates. To achieve this objective, we have contemplated incorporating therein amounts of rubber granules according to different volume substitution percentages being 10%, 17.5%, and 25%. A comparison of the results with a control concrete has been established.The obtained results make it possible to demonstrate that the substitution of a percentage of sand by rubber granules decreases the mechanical strengths and increases the expansion in water. On the other hand, it improves the resistance to attack from H2SO4, Na2SO4, and seawater. The latter is evaluated by the loss and gain in mass as well as the loss in mechanical resistance, especially in the long term (more than 90 days), decreases drying shrinkage, thus decreasing microscopic cracks and providing better durability.

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“…Many researchers studied various waste and by-product materials that are available in the local market to find a proper substitute for natural aggregate while eliminating the transportation pollution and expenses [19,20]. For example, recycled concrete aggregate [21][22][23][24][25][26][27], recycled tires [28][29][30][31][32], post-consumer glass [33][34][35][36], recycled plastic [37][38][39], and steel by-product aggregate have been suggested a replacement for fine or coarse aggregate [40][41][42][43][44][45][46][47]. Steel slag aggregate, a by-product of the steel manufacturing process, is another possibility.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Water-Cooled and Air-Cooled Slag Aggregate in Concrete: A Solution to the Secular Economy

El-Tair

Bakheet

El-Feky

et al. 2020

Eng

Self Cite

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Aggregates are generally thought of as inert filler within a concrete mix, and a typical concrete mix is comprised of as much as 70–80% of them. They play an essential role in the properties of both fresh and hardened concrete. Nowadays, scientists are aiming to use waste materials, thereby replacing natural aggregates for economic and environmental considerations. This study investigates the effect of the utilization of steel slag by-product aggregates (air- and water-cooled slag) as concrete aggregates on the behavior characteristics of concrete. Various concrete mixtures, with different levels of replacement of slag aggregate (50, 75, and 100%), were conducted in order to find the optimum percentages to improve the microstructure and different properties of concrete (fresh and hardened). The results showed that increasing the fine aggregate replacement percentage led to a decrease in compressive strength values, in contrast with coarse aggregate replaced with slag aggregate. The steel slag aggregates showed potential to be used as replacement for natural aggregate with comparable compressive strength and acceptable workability.

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Performance of high strength concrete containing recycled rubber

Cited by 144 publications

References 49 publications

Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete

Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete

Contribution to the Study of the Durability of Rubberized Concrete in Aggressive Environments

Utilization of Water-Cooled and Air-Cooled Slag Aggregate in Concrete: A Solution to the Secular Economy

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