Augmentation of dissimilar techniques for enhancing the concrete properties with recycled coarse aggregate and manufactured sand

Raman, J. Vengadesh Marshall; Ramasamy, V.

doi:10.1016/j.jmrt.2021.06.094

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…The following methods are used to treat the recycled aggregate: thermal treatment (7), chemical treatment (10), mechanical scrubbing treatment (7), carbonation and wrapping methods (14), calcium metasilicate slurry (30), cement treatment (59), mineral additives (25), modified concrete mixer (11), warm mix asphalt and hydrated lime (21), CO 2 curing technique (14), silica gel techniques (60), waste oil and asphalt emulsion (15), nano materials (61), super plasticizers (9), bio-deposition approach (28), silane-based water repellent (62). All of these methods are adopted to enhance the surface of recycled aggregate.…”

Section: Proces Produkcji Kruszywa Z Recyklingumentioning

confidence: 99%

“…To maintain preferred workability, the aggregate must be used under pre-wet conditions (4). Using high range water reducing agents, it is possible to increase the workability of concrete (10). The old mortar attached on the surface of aggregate plays a key role in determining workability, strength, and durability.…”

Section: Introductionmentioning

confidence: 99%

“…Stężenie kwasu, większe od 3%, powoduje efekt opóźniający, w wytwarzaniu betonu (16)(17)(18). Do oczyszczania kruszywa z recyklingu stosuje się następujące metody: obróbka termiczna (7) i chemiczna (10), obróbka mechaniczna metodą szorowania (7), metody karbonizacji (14), zawiesina metakrzemianu wapniowego (30), obróbka cementem (59), dodatki mineralne (25), stosowanie mieszalnika betonu (11), domieszki mineralne (25), ciepła mieszanka asfaltowa i wapno hydratyzowane (21), technika twardnienia za pomocą CO 2 (14), stosowanie żelu krzemionkowego (60), stosowanie emulsji z oleju odpadowego i asfaltu (15), nano-materiały (61), superplastyfikatory (9), metoda składowania (28), hydrofobizacja z zastosowaniem krzemowodorów (62). Wszystkie te metody są stosowane w celu poprawy powierzchni kruszywa, z recyklingu.…”

Section: Introductionunclassified

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Dissimilar surface treated recycled coarse aggregate in concrete

Raman,

Ramasamy

2023

Cement Wapno Beton

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The surface zone of the recycled aggregate plays a significant role in the strength and durability of concrete. In this research, various concrete series incorporating natural coarse aggregate [NCA], untreated recycled coarse aggregate RCA(UN), mechanical scrubbing treated coarse aggregate RCA(MS), sulfuric acid treated coarse aggregate RCA(H2SO4) and hydrochloric acid treated aggregate RCA(HCl) were investigated. Manufactured sand was used as an alternative to natural river sand in five series of concrete with 100% replacement ratio. The mechanical properties: compressive, split tensile, and flexural strength, respectively, were determined at the age of 28 and 56 days. Durability properties: water absorption, drying, sulfuric acid, sodium sulphate and sorptivity test were determined at the age of 28, 56 and 90 days and the results were compared to reference concrete. According to the results, RCA(UN) was found to marginally decreased the concrete performance, and the above mentioned treated aggregate shows a significant improvement in overall performance compared to RCA(UN), especially RCA(MS), which enhances the concrete more significantly than other methods. Moreover, the scanning electron microscope results also emphasize the enhanced microstructure of treated recycled aggregate in concrete. The photographic view of the cross sections of the samples shows a superior interfacial transition zone in all kinds of treated aggregate concrete than in untreated recycled aggregate concrete.

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Section: Proces Produkcji Kruszywa Z Recyklingumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionunclassified

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Dissimilar surface treated recycled coarse aggregate in concrete

Raman,

Ramasamy

2023

Cement Wapno Beton

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“…With the continuous rise in waste accumulation and indiscriminate dumping across the globe, the environmental repercussions are becoming more pronounced. When employed in construction, concrete poses two significant adverse effects on the environment [9]. It uses a tremendous amount of natural resources, but it also necessitates the demolition of the building after its useful life is through [1,10].…”

Section: Figure 1 Assessment Of Recycling [5]mentioning

confidence: 99%

A Green Way of Producing High Strength Concrete Utilizing Recycled Concrete

Shaaban,

Edris,

Odah

et al. 2023

Civ Eng J

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Multiple studies have investigated the influence of recycled aggregates derived from concrete waste on the efficacy of structural concrete manufactured in recent times. By utilizing recycled aggregates obtained from construction and demolition debris, it is possible to safeguard natural aggregate resources, reduce the demand for landfill space, and promote the utilization of sustainable building materials. However, compared to natural aggregate, bonded cement mortar on recycled concrete aggregate exhibits higher porosity, greater water absorption capacity, and lower strength. The mechanical and durability characteristics of freshly poured and hardened concrete made from recycled concrete aggregate are adversely affected as a result. This study presents comprehensive experimental research aimed at examining the residual mechanical properties and resistance to acid attack of normal and high-strength mixes of recycled aggregate concrete (RAC) using the compressible packing model. Recycled aggregate was employed as both coarse and fine aggregate. The recycled concrete samples were prepared in a manner that corresponded to the proportions of both the coarse and fine aggregates. Twelve mixtures were designed and cast, and their performance was evaluated based on various strength parameters (compressive strength, splitting tensile strength, and flexural strength) as well as acid attack resistance properties (porosity and ultrasonic pulse velocity). The findings indicate that recycled concrete aggregate can be utilized in the production of high-strength concrete, with mechanical property values that are significantly acceptable compared to concrete containing natural aggregates. Moreover, the addition of Silica Fume as a cement replacement in concrete plays a crucial role in enhancing sulphate resistance. In terms of concrete product utilization, recycled concrete and its significance in this study played a crucial role in environmental preservation. Doi: 10.28991/CEJ-2023-09-10-08 Full Text: PDF

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“…After curing days the compression, flexural testing were conducted to obtain the strength. [25][26][27][28][29][30][31][32] The pretreated specimens' initial weights were noted through weighing machine and were immersed in the experimental solution by pickling process method. The experimental solution used was in 1N Nacl and 1NHcl solution.…”

Section: Materials Usedmentioning

confidence: 99%

Studies on the Flexural Behavior of Concrete Beams with Lathe Waste in RC

Aravindasamy¹

2022

IJRASET

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This paper emphasis on the study of using lathe scrap as fiber reinforced concrete in the innovative construction industry. Every day about 3 to 4kgs of lathe waste are generated by each lathe industries in the Pondicherry region and dumped in the barren soil there by contaminating the soil and ground water, which creates an environmental issue. Hence by adopting proper management by recycling the lathe scrap with concrete is considered to be one of the best solutions. The test were conducted as per the Indian standard procedure for its flexural, split tensile and compressive strength and compared with FRC and conventional PCC. Also the workability of fresh concrete that containing different ratios of lathe scrap was carried out by using slump test. The result showed that addition of lathe scrap in to PCC mixture enhanced its compressive strength while it decreased the workability of the fresh concrete containing the lathe scrap. Keywords: Fiber Reinforced Concrete (FRC), Plain Cement Concrete (PCC), lathe scrap reinforced concrete, lathes scrap.

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Augmentation of dissimilar techniques for enhancing the concrete properties with recycled coarse aggregate and manufactured sand

Cited by 17 publications

References 18 publications

Dissimilar surface treated recycled coarse aggregate in concrete

Dissimilar surface treated recycled coarse aggregate in concrete

A Green Way of Producing High Strength Concrete Utilizing Recycled Concrete

Studies on the Flexural Behavior of Concrete Beams with Lathe Waste in RC

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