Sound barrier properties of sustainable waste rubber/geopolymer concretes

Gandoman, Marjan; Kokabi, Mehrdad

doi:10.1007/s13726-014-0304-1

Cited by 57 publications

(21 citation statements)

References 23 publications

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“…ECO-FRIENDLY CHOPPED TIRE RUBBER AS REINFORCEMENTS IN FLY ASH BASED GEOPOLYMER CONCRETE 5 and 30% as shown in Figures 6-c and 6-d initiate additional voids in the internal microstructure and this is definitely the main reason for density and compressive strength reduction at hardened state. Same observations were noticed by Embong et al (2016) and Gandoman and Kokabi (2015).…”

Section: Resultssupporting

confidence: 85%

Eco-Friendly Chopped Tire Rubber as Reinforcements in Fly Ash Geopolymer Concrete

2020

Global NEST: The International Journal

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<p>One of the major challenges faced by researchers is to recycle industrial wastes in a manner that reduces their environmental impact in nature. An experimental study was carried out to determine the suitability of using chopped tire rubber as reinforcements in green and sustainable geopolymer concrete, with the purpose of using them as nonstructural products. The geopolymer mixture was made by mixing of fly ash powder, fine aggregate, and Superplasticizer in Na2SiO3/NaOH solution. Mixtures were divided into four different groups, with constant water to fly ash ratio of 0.12 and alkaline dosage of 45% by weight of fly ash, based on the recycled chopped tire rubber (CTR) content: 0, 10, 20, and 30% by volume of fine aggregate with two maximum sizes (2 and 4mm). Hardened properties of resulted geopolymer like compressive strength, density; and ultrasonic pulse velocity were examined at 28d. Besides that, X-Ray diffractometer and Scanning Electron Microscope were used in order to observe the microstructure of the resulted geopolymer concrete. In view of the consequences for this study, it is preferable to replace no more than 10% of fine aggregate in geopolymer concrete by CTR. In addition, according to SEM photographs, increasing the CTR content more voids will be pronounced and thus, decreasing the mechanical performance.</p>

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Section: Resultssupporting

confidence: 85%

Eco-Friendly Chopped Tire Rubber as Reinforcements in Fly Ash Geopolymer Concrete

2020

Global NEST: The International Journal

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“…However, significant reductions in compressive and flexural strength (e.g. up to around 93% reduction depending on the replacement ratio of CR) were observed in either OPC or AAM containing CR (Aly et al, 2019;Dehdezi et al, 2015;Gandoman and Kokabi, 2015;Park et al, 2016;Wongsa et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Zhong

Poon

Chen

et al. 2019

Journal of Cleaner Production

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To mitigate the potential problems of waste tyres and Portland cement greenhouse gas emissions while further promote the sustainable development of construction industry, this paper, for the first time, explores the workability and mechanical properties of crumb rubber alkali-activated fly ash-slag mortar reinforced with recycled tyre steel fibre (RSFRAM) considering different contents of crumb rubber (CR, i.e. 5%, 10% and 15% replacement by volume of fine aggregate) and recycled tyre steel fibre (RTSF, i.e. 0.5% and 1.0% by volume). The results indicate that the inclusion of CR led to a 4.7% to 26.7% improvement in workability of RSFRAM when the RTSF content was low, while the addition of RTSF compensated the strength loss caused by the addition of CR. The combination of CR and RTSF created a synergistic effect on the flexural behaviour of RSFRAM. The optimal mixture was regarded as R5F1.0 (5% CR replacement and 1.0 vol.% RTSF) exhibiting comparable compressive strength, and superior flexural strength (around 171.1% higher), toughness indices (highest among all RSFRAMs) and residual strength factors (higher than 100) compared to the reference mixture without CR and RTSF. In addition, R5F1.0 can meet the strength requirement of concrete (i.e. 28 MPa for basic construction application) and thus suitable for structural applications as a sustainable material.

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“…Contrary to ordinary PC, studies on the acoustic insulation properties of geopolymeric concrete/mortars are very limited. The major finding can be found in Gandoman and Kokabi's work [80]. The authors investigated the insulating behavior of eco-friendly sound barriers made of MK-based geopolymer concrete functionalized with ground rubber (GR) deriving from end-of-life tires, comparing its performance with that of conventional PC concrete panels.…”

Section: Gc-based Mixes For 3d Printing Fabrication Technologiesmentioning

confidence: 99%

Recent Advances in Geopolymer Technology. A Potential Eco-Friendly Solution in the Construction Materials Industry: A Review

2021

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In the last ten years, the Portland cement industry has received wide criticism due to its related high embodied energy and carbon dioxide footprint. Recently, numerous “clean” strategies and solutions were developed. Among these, geopolymer technology is gaining growing interest as a functional way to design more eco-friendly construction materials and for waste management issues suffered by various industries. Previous research has highlighted the attractive engineering properties of geopolymeric materials, especially in terms of mechanical properties and durability, resulting in even higher performance than ordinary concrete. This review provides a comprehensive analysis of current state-of-the-art and implementations on geopolymer concrete materials, investigating how the key process factors (such as raw materials, synthesis regime, alkali concentration, water dosage, and reinforcement fillers) affect the rheological, microstructural, durability, and mechanical properties. Finally, the paper elucidates some noteworthy aspects for future research development: innovative geopolymer-based formulations (including alkali-activated blends for additive manufacturing and thermo-acoustic insulating cellular compounds), concrete applications successfully scaled in the civil-architectural fields, and the perspective directions of geopolymer technology in terms of commercialization and large-scale diffusion.

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Sound barrier properties of sustainable waste rubber/geopolymer concretes

Abstract: sound transmission loss, better sound absorption property and noise reduction coefficient compared to conventional concrete.

Cited by 57 publications

References 23 publications

Eco-Friendly Chopped Tire Rubber as Reinforcements in Fly Ash Geopolymer Concrete

Eco-Friendly Chopped Tire Rubber as Reinforcements in Fly Ash Geopolymer Concrete

Engineering properties of crumb rubber alkali-activated mortar reinforced with recycled steel fibres

Recent Advances in Geopolymer Technology. A Potential Eco-Friendly Solution in the Construction Materials Industry: A Review

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