Toward the development of sustainable concrete with Crumb Rubber: Design-oriented Models, Life-Cycle-Assessment and a site application

Gravina, Rebecca; Xie, Tianyu

doi:10.1016/j.conbuildmat.2021.125565

Cited by 35 publications

(6 citation statements)

References 106 publications

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“…Moreover, less carbon dioxide is emitted with 3 and 5% recycled rubber-containing samples. A review study situated most of the research dealing with used rubber in the low 500 kg CO 2 eq per m 3 of concrete mix [70,71]. The values presented in this study show correlation and better performance than the average estimated in the review study.…”

Section: Discussionmentioning

confidence: 60%

Effects of Recycled Rubber Particles Incorporated as Partial Sand Replacement on Fresh and Hardened Properties of Cement-Based Concrete: Mechanical, Microstructural and Life Cycle Analyses

García-Troncoso

Acosta-Calderon

Flores-Rada³

et al. 2022

Materials

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Cement is one of the most valuable materials in today’s society, as it is used in most construction developments known to mankind. However, the energy intensive process and significant environmental impacts related to the production of Ordinary Portland Cement have shown the importance of searching for more sustainable materials. Concrete uses different aggregates added to the cement binder to lower, not only cost, but other factors like environmental burden, while maintaining good mechanical properties. This study analyzes the properties of fresh and hardened concrete incorporating recycled rubber to replace fine aggregate. Locally sourced 2 mm diameter rubber was incorporated in a regular strength concrete matrix into three different replacement levels, i.e., 3%, 5%, and 10%. Compression, tensile, flexural, and modulus of elasticity of hardened concrete were carried out in specimens aged 7, 14, and 28 days. In addition, non-destructive ultrasonic pulse velocity and rebound number tests were only performed on specimens aged 28 days. Once the tests were carried out, the fresh and hardened concrete properties were obtained. Similarly, the compressive and flexural strengths had the exact relationship between the values obtained. On the other hand, the modulus of elasticity tends to decrease due to the presence of the rubber. Consequently, it is recommended not to develop mix designs with more than 5% rubber because it is not meaningfully affected. The fine aggregate can be partially replaced by the rubber, keeping almost the same performance compared with sand-only counterparts. In addition, the life cycle assessment showed a reduction of up to 40% in the global warming potential. In fact, the 15% recycled rubber concrete mix has a climate change indicator of approximately 245 kg of CO2 eq.

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Section: Discussionmentioning

confidence: 60%

Effects of Recycled Rubber Particles Incorporated as Partial Sand Replacement on Fresh and Hardened Properties of Cement-Based Concrete: Mechanical, Microstructural and Life Cycle Analyses

García-Troncoso

Acosta-Calderon

Flores-Rada³

et al. 2022

Materials

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“…The composition of rubber tires consists of 40 to 50% rubber, up to 40% carbon black, and up to 15% low-molecular-weight additives [5]. The primary objective of this study was to develop an environmentally friendly and sustainable material that would benefit humanity [6,7]. However, with the increase in construction activity, high-quality natural resources, such as sand, rock, and aggregates, are quickly running out.…”

Section: Introductionmentioning

confidence: 99%

“…A few studies have demonstrated that the toughness, plastic distortion, and crack resistance of rubber samples have increased, while their strength and stiffness are reduced. To improve the overall properties of concrete, such as toughness, durability, and deformation, a percentage of fine aggregate can be replaced with crumb rubber [4][5][6][7]. Rajan et al [16] utilized M30 grade concrete by varying the percentages of crumb rubber, used as a replacement for sand, and studied the chemical bond between rubber and the cement matrix.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Strength and the Environmental Performance of Concrete with Pre-Treated Crumb Rubber and Micro-Silica

Rajagopal,

Ganta,

Pamu

2024

Recycling

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Dumped non-biodegradable tires present a significant environmental threat, with overflowing landfills and associated health risks highlighting the urgency of tire waste disposal. Current disposal methods, such as stacking tires in open spaces, exacerbate the problem. The large-scale recycling of tire rubber waste offers environmental benefits. This study examines the effects of pre-treatment using NaOH and micro-silica as a mineral admixture on the mechanical strength of crumb rubber concrete (CRC) with partial replacement of natural sand. Samples of M20 and M30 grade were prepared with varying levels of crumb rubber (CR) replacement and evaluated at 28 days. CRC prepared with pre-treated NaOH solution and micro-silica showed improved workability and strength compared to conventional concrete and untreated CRC, with the highest strength observed for 5% CR replacement using micro-silica. Predictive models and micro-structural analysis validated these findings. Life Cycle Assessment (LCA) using OpenLCA v2.10 software and the ecoinvent database revealed that incorporating micro-silica into CRC did not significantly increase environmental impacts, compared to conventional concrete across different mixes.

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“…No obstante, se debe considerar el porcentaje de reemplazo y el tamaño del RCN, puesto que podría afectar negativamente las propiedades físicas, mecánicas y de durabilidad de los materiales a base de cemento (Bisht y Ramana, 2017). En estado fresco, el uso de RCN tiene un efecto adverso en la trabajabilidad del hormigón, lo que se asocia a la cantidad y tamaño del RCN (Gravina y Xie, 2022), como también a la fricción entre partículas (superficie rugosa del RCN) y a la naturaleza no polar del RCN (Rashid, Yazdanbakhsh y Rehman, 2019).…”

Section: Introductionunclassified

Análisis de las propiedades físicas y mecánicas del residuo de caucho de neumático como reemplazo parcial del agregado fino en el hormigón

Fernandez-Torrez

Rocha

Chileno

2022

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The objective of this study is to evaluate the physical and mechanical properties of concrete with waste tire rubber (WTR) as a partial substitute for sand, considering local materials from the city of Cochabamba, Bolivia, to promote a circular economy. The sand was replaced by WTR (in volume) in four percentages: 0% (reference), 5%, 10%, and 20%, evaluating its mechanical properties (resistance to compression, traction, and bending) and physical properties (specific mass, water absorption, and void index). The results indicate that there is a tendency to decrease with a higher percentage of WTR, both for mechanical resistance and for physical properties, except for the mixture with 5% WTR, which had results comparable to concrete with natural sand. WTR can be used in the local production of concrete up to 5% without compromising its mechanical and physical properties, in addition to having a sustainable approach.

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Toward the development of sustainable concrete with Crumb Rubber: Design-oriented Models, Life-Cycle-Assessment and a site application

Cited by 35 publications

References 106 publications

Effects of Recycled Rubber Particles Incorporated as Partial Sand Replacement on Fresh and Hardened Properties of Cement-Based Concrete: Mechanical, Microstructural and Life Cycle Analyses

Effects of Recycled Rubber Particles Incorporated as Partial Sand Replacement on Fresh and Hardened Properties of Cement-Based Concrete: Mechanical, Microstructural and Life Cycle Analyses

Enhancing the Strength and the Environmental Performance of Concrete with Pre-Treated Crumb Rubber and Micro-Silica

Análisis de las propiedades físicas y mecánicas del residuo de caucho de neumático como reemplazo parcial del agregado fino en el hormigón

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