Sustainable self compacting concrete from C&amp;D waste by improving the microstructures of concrete ITZ

Rajhans, Puja; Panda, Sarat Kumar; Nayak, Sanket

doi:10.1016/j.conbuildmat.2017.12.132

Cited by 72 publications

(15 citation statements)

References 38 publications

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“…The high porosity and water absorption capacity of RCAs make the ITZ even poorer. It was also found that the nature of aggregates strongly influences the ITZ quality [37]. In the present study, NAs used in the mixes (B1 and B5) are of limestone origin.…”

Section: A N U S C R I P Tmentioning

confidence: 56%

Mechanical and durability properties of concrete based on recycled coarse and fine aggregates produced from demolished concrete

Berredjem

Arabi

Molez

2020

Construction and Building Materials

102

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: A N U S C R I P Tmentioning

confidence: 56%

Mechanical and durability properties of concrete based on recycled coarse and fine aggregates produced from demolished concrete

Berredjem

Arabi

Molez

2020

Construction and Building Materials

102

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“…Nevertheless, some authors also state that the pozzolanic activity promoted by the use of some RA may improve some of the durability-related properties [ 24 , 25 ]. Due to the generally inferior performance of concrete with RA from CDW compared to natural aggregate concrete, some authors investigated the possibility of mitigating the outcomes of using RA by the inclusion of steel [ 26 ] or polypropylene [ 27 ] fibers or mineral additions such as silica fume [ 28 ] or fly ash [ 29 ] in concrete mixes. It is shown that fibers are able to increase the compressive and tensile strengths and toughness of concretes with RA from CDW [ 26 , 27 ] and that the mineral additions contribute to a more compact material and enhance the interfacial transition zone (ITZ), thus improving both their mechanical and durability-related properties [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

On the Development of a Technical Specification for the Use of Fine Recycled Aggregates from Construction and Demolition Waste in Concrete Production

et al. 2020

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The possibility of using recycled aggregates from construction and demolition waste (CDW) in concrete is rather widely agreed upon when it comes to the use of coarse recycled aggregates. However, this is not the case when fine recycled aggregates (FRA) are considered, as it is deemed that these seriously impair the behaviour of concrete. Hence, this work presents a technical specification proposal for the use of FRA from CDW in concrete, to attempt to fill this gap in legislation. The specification is based on a wide collection of experimental results, from which it is shown that for low incorporation ratios (up to 25%), the properties of concrete with FRA from CDW are comparable to those of a reference concrete. The intended international scope of the specification is ensured by the fact that FRA from CDW are typified by composition (percentage of concrete, masonry, glass, etc.) rather than by geographical origin or construction type. It is shown that, after typifying the FRA and assuming, as per design, the acceptable percentage losses (relative to a reference concrete) of mechanical, durability-related and long-term physical properties, if the maximum incorporation ratios proposed of each type of FRA are used, the variation of properties remains within the limits established.

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“…[16] The traditional ITZ of RCA is improved by using different admixtures and modern mixing techniques -The SCC mix uses two mixing procedures, Normal Mixing Approach (NMA) and Two Stage Mixing Approach (TSMA), to achieve distinct RCA ratios. [1] C. Mixing Approach Normal Mixing Approach (NMA) First, the fine and coarse aggregates (FA & CA) were combined for 30 seconds. Flame retardant additives (fly ash and cement) were applied.…”

Section: A Obtaining the Rca From Candd Wastesmentioning

confidence: 99%

Promoting the Reuse of C&D Wastes with Better Properties via Construction Made from Recycled Concrete Aggregates.

Anand

Chakraborty

2021

Preprint

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The demand of infrastructure has increased strikingly due to increasing populace and improved standard of living. Construction sector has witnessed record development due to change in its policies and India being a developing country is seeing ascent in the construction activities. The change is an unavoidable part for rapid urbanization and demolition and reconstruction are the basic necessities for redevelopment. Construction and Demolition (C&D) squanders become a crucial ecological difficulty because C&D squanders are non-biodegradable. In this paper an analytical study is engulfed which incorporates Recycled Concrete Aggregate (RCA) obtained from C&D squanders as a halfway replacement of fine aggregate in Self-Compacting Concrete (SCC) utilizing Two Stage Mixing Approach Method (TSMA) to acquire a concrete with durability properties better than Normal Mixing Approach (NMA).

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Sustainable self compacting concrete from C&D waste by improving the microstructures of concrete ITZ

Cited by 72 publications

References 38 publications

Mechanical and durability properties of concrete based on recycled coarse and fine aggregates produced from demolished concrete

Mechanical and durability properties of concrete based on recycled coarse and fine aggregates produced from demolished concrete

On the Development of a Technical Specification for the Use of Fine Recycled Aggregates from Construction and Demolition Waste in Concrete Production

Promoting the Reuse of C&D Wastes with Better Properties via Construction Made from Recycled Concrete Aggregates.

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