Effect of fibres on the strength and toughness characteristics of recycled aggregate concrete

Paluri, Yeswanth; Mogili, Sudhakar; Heeralal, M.; Noolu, Venkatesh

doi:10.1016/j.matpr.2020.07.555

Cited by 22 publications

(13 citation statements)

References 22 publications

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“… Compensating concrete performance loss using fibers: Zong et al [ 60 ] observed that 1.2% steel fiber incorporation evened or increased the 28-day flexural strength of concretes containing 50–100% RA compared to 100% NA concrete without fibers. Similarly, Paluri et al [ 61 ] observed 28-day compressive and flexural strength reductions of up to 23 and 18%, respectively, when NA was replaced with 50–100% RA. However, when adding 1% steel fiber, the 50% RA concrete had comparable (5% lower) compressive strength and 31% higher flexural strength than 100% NA concrete.…”

Section: Challenges and Outlookmentioning

confidence: 81%

Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

et al. 2022

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Construction and demolition activities consume large amounts of natural resources, generating 4.5 bi tons of solid waste/year, called construction and demolition waste (C&DW) and other wastes, such as ceramic, polyethylene terephthalate (PET), glass, and slag. Furthermore, around 32 bi tons of natural aggregate (NA) are extracted annually. In this scenario, replacing NA with recycled aggregate (RA) from C&DW and other wastes can mitigate environmental problems. We review the use of RA for concrete production and draw the main challenges and outlook. RA reduces concrete’s fresh and hardened performance compared to NA, but these reductions are often negligible when the replacement levels are kept up to 30%. Furthermore, we point out efficient strategies to mitigate these performance reductions. Efforts must be spent on improving the efficiency of RA processing and the international standardization of RA.

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Section: Challenges and Outlookmentioning

confidence: 81%

Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

et al. 2022

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“…To meet this necessity, recycling and reusing demolition wastes in various civil infrastructures such as embankments, concrete production, road works, and filling material in retaining structures are in practice nowadays [10][11][12]. The higher probability for salvageable and retrievability of construction wastes is one of the major driving forces for the researchers in the construction industry to develop new technologies and methods for efficient utilization and achieve sustainability by reducing the consumption of conventional resources [13,14]. Meanwhile, issues related to environmental safety associated with the safe ejection of construction wastes such as air contamination due to increased dust content in the atmosphere and water pollution resulting from unorganized landfills can be addressed by effective use of construction demolition recycled materials [4,5].…”

Section: Introductionmentioning

confidence: 99%

Geo technical Laboratory Evaluation of Construction Demolition Recycled Material for Road Embankments

Shivaprasad

Koppoju

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The recycling of construction demolition waste material has already become a prime focus under sustainable technologies and innovations across the globe. A report announced by the Centre for Science and Environment (CSE), Delhi, in August 2020 stated, India generates approximately 150 million tons of construction demolition waste every year and recycles only 1%. The rest remains strewn across, in landfills causing air contamination and water tainting. Whereas “The United States Environment Protection Agency (USEPA)” approximated that 600 million tons of construction waste had been generated in 2016 in the USA, around 75% of the waste was recycled and also used effectively. The present paper focuses on predicting the suitability of recycled construction demolition waste material for road embankment and comparing its characteristics with conventional embankment materials. The Guidelines given by IRC and BIS were following to predict the feasibility of recycled construction demolition waste as fill material for road embankment. Laboratory results indicated the suitability of recycled construction demolition waste material for road embankments. This study probed a single source of construction demolition waste with one particular gradation as it can significantly alter the properties and suitability requirements.

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“…The possible manufactures using the RAP mixes with similar properties to HMA mixes through the use of WMA additives [22,24,[27][28]. And also, few researchers have adopted the addition of RAP and steel fibres and they showed better fatigue, durability and moisture susceptibility compared to conventional concrete [31][32][33] Polypropylene fibres are used as reinforcement in pavement layers and these have strong, lightweight thermoplastic polymer [6]. The basic properties polypropylene is detailed in table 4 for better understating.…”

Section: Introductionmentioning

confidence: 99%

A Laboratory evaluation of RAP modified mixtures for moisture susceptibility

Durgaakshitha¹,

Adepu²

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Preparation of Hot mix asphalt (HMA) pavement construction of pavement layers involves in release of harmful gases which affects the environment conditions. The use of natural aggregates for the preparation of HMA is also affecting the natural resources. WMA is one among the technologies for reduction in mixing and compaction temperature RAP has the advantages for the use in partial replacement with natural aggregates in preparation of modified bituminous mix. In this study, it was investigated on usage of polypropylene fibres of 6mm length in Warm mix asphalt with recycled aggregates. For modification of base binder, Sasobit wax compound was added so as to improve the reduce the overall energy consumption and reduction in toxic emission during construction of pavement. The specimens were prepared under analytical gradation method. The main objective of this paper is incorporate the principle of sustainability in pavement construction by the usage of RAP with the inclusion of fibre at four different percentages with an interval 0.1 to know the performance of RAP modified mixtures. In this study, physical properties as well as ageing properties were performed on virgin, modified and RAP binder, specimens were produced for Marshall, Indirect tensile strength (IDT) to determine the moisture susceptibility and volumetric properties. The modified rap mix of 3% WMA of 15% RAP with 0.2% PP fibre and 0.3% rejuvenator, the above mix combination values obtained results has displayed better performance evaluation for moisture resistance with the inclusion of fibre in modified RAP mixes. This study shall provide direction for achieving environmentally friendly pavement technologies.

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Effect of fibres on the strength and toughness characteristics of recycled aggregate concrete

Cited by 22 publications

References 22 publications

Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

Geo technical Laboratory Evaluation of Construction Demolition Recycled Material for Road Embankments

A Laboratory evaluation of RAP modified mixtures for moisture susceptibility

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