Recycling of Concrete (Recycling Coarse Aggregate)

Recycled aggregates are a way of reusing materials by keeping them from being disposed into landfills [1]. Recycling of concrete is a simple process. It involves breaking, removing, and …

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Evaluation on the Surface-Modified Recycled Coarse Aggregate …

The construction industry generates a huge amount of concrete waste that needs to be recycled, which is said to be recycled aggregate (RA) being used for partial or total substitution of natural aggregate. Upscaling recycled aggregate in concrete production reduces dumped waste and decreases energy consumption in the extraction of new materials. However, the high water …

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Sustainable building materials-recycled aggregate and concrete…

Figure 1 counts the number of papers about recycled concrete materials and recycled concrete in the Elsevier database in 20 years (related paper terms include recycled concrete coarse aggregate, recycled concrete fine aggregate, recycled concrete powder, and recycled concrete). Many relevant literature reports have demonstrated the excellent ...

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Recycled coarse aggregate from parent concrete with …

Waste concrete originates from the parent concrete (PC), which has either reached its design life or is prematurely demolished [11]. The waste concrete is recycled by the factory, and the recycled coarse aggregate (RCA) is obtained by crushing, screening and cleaning.

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Use Of Recycled Aggregate In Concrete

the recycled aggregate. The use of recycled aggregate generally increases the drying shrinkage creep & porosity to water & decreases the compression strength of concrete compared to that of natural aggregate concrete. It is nearly 10-30% as per replacement of aggregate. Recycling reduces the cost (LCC) by about 34-41% & CO 2 emission (LCCO 2

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Performance studies on concrete with recycled coarse …

recycled concrete aggregate was still lower than that of the control concrete. Fly ash improved the resistance to chloride ion penetration but it also increased the carbonation depth of concrete.

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Carbonated recycled coarse aggregate and uniaxial compressive stress

Recycled coarse aggregate for concrete (GB/T 25177-2010), China Architecture & Building Press, Beijing, 2010. Google Scholar [36] L. Butler, J. West, S. Tighe, Quantification of Recycled Concrete Aggregate (RCA) Properties for Usage in Bridges and PavementsAn Ontario Case Study, Innovative Developments in Sustainable Pavements Session of the ...

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Eco-Friendly Concrete: A Dual Surface Modification …

AbstractThis study aims to boost the mechanical performance of eco-friendly concrete by addressing challenges related to recycled coarse aggregates (RCA), particularly …

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Mechanical performance of recycled aggregate concrete in …

Reusing reclaimed brick coarse aggregate (RBCA) concrete has great significance for the green development of our country. The research on RCCA concrete has matured, and …

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(PDF) RECYCLED AGGREGATE CONCRETE (RAC): …

Therefore, recycling coarse aggregate from CDW in concrete is one of the sustainable solutions to prevent a serious threat to the environment due to the extraction of aggregates and ...

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Treatment of recycled concrete aggregate to enhance concrete …

Nevertheless, utilizing recycled aggregates at a full replacement level may cause a reduction in its fresh, mechanical, and durability characteristics compared to concrete produced with normal coarse aggregate (NCA). Recycled concrete aggregate (RCA) is distinguished from NCA by the presence of adhered mortar [7], [8].

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Recycled Concrete Aggregate

Recycled aggregate concrete (RAC) is concrete made with recycled concrete aggregate (RCA) instead of natural aggregate (NA). RCA are aggregates obtained by recycling of clean concrete …

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Recycled Coarse Aggregates in Concrete: A Comprehensive …

By incorporating recycled coarse aggregate (RCA) derived from construction and demolition waste into concrete, waste reduction and natural resource conservation is achieved. …

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Compressive behavior of manufactured sand recycled coarse aggregate

Khan et al. [22] investigated the impact of coarse recycled aggregate (CRA) and processed coarse recycled aggregate (PCRA) on the performance of alkali-activated concrete (AAC) in marine environments and acidic conditions (5 % HCl and 5 % H2SO4 solutions). The results showed that the use of PCRA significantly improved the durability and ...

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Recycled Concrete Aggregates: A Review

Keywords: recycled concrete aggregate, water absorption, residual mortar, aggregate properties, concrete material properties, ... coarse agg regate from the original concrete that is created.

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Self-compacting concrete with recycled coarse aggregates from concrete

This means that recycling waste into coarse aggregate would contribute significantly to reduction of the waste. This resulted in studies on SCC with RCA (Recycled Coarse Aggregate) – the combination of Recycled Aggregate Concrete (RAC) with its ability to self-consolidate (Fig. 1 a).

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Use of recycled concrete aggregate in concrete: A review

The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for ...

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A REVIEW OF RECYCLED CONCRETE AGGREGATES AS A

Recycled concrete is characterised by replacing different percentages of natural coarse aggregate with recycled coarse aggregate (0, 20, 50 and ) and two different water-to-cement ratios .50 ...

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Interface parameters of recycled aggregate concrete …

Recycled concrete aggregates are aggregates derived from waste concrete through sorting, crushing, and screening processes. The fundamental difference between RA and Natural coarse Aggregate (NA) is that RA often contains old mortar on its surface, resulting in lower strength and higher porosity compared to NA.

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Use of recycled aggregate concrete in structural …

Recycled Coarse Aggregate for Concrete (GB/T 25177-2010). China: National Standards of People's Republic of China. (Open in a new window) Google Scholar. Chinnu, S. N., S. N. Minnu, A. Bahurudeen, and R. …

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Improving recycled coarse aggregate (RCA) and recycled coarse aggregate

Recycled aggregate (RA), including recycled fine aggregate (RFA) and recycled coarse aggregate (RCA), is generated by crushing old concrete from C&D wastes [2], [3]. Recycled aggregate concrete (RAC) uses RA to partly …

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Property Enhancement of Recycled Coarse Aggregate and Its Concrete …

The poor properties of recycled coarse aggregate (RCA) and recycled coarse aggregate concrete (RCAC) are considered key constraints hindering the reuse of this waste resource in marine engineering. The CO2-based accelerated carbonation method, which utilizes the alkali aggregate properties of RCA to achieve CO2 uptake and sequestration while …

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Material and structural properties of recycled coarse aggregate

This paper presents a review of the research on seawater sea-sand recycled coarse aggregate concrete (SSRAC), which offers a solution to the scarcity of river sand and freshwater while also promoting the reuse of waste concrete. The study reveals that the conventional mix proportion design method underestimates the compressive strength of …

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Impact resistance of recycled coarse aggregate concrete …

As urbanization and infrastructure development accelerate, the renovation, transformation, and demolition of old buildings have increased the production of construction waste, primarily composed of concrete [1].To address this issue, waste concrete is recycled and processed into recycled coarse aggregates (RCA), which are sieved, cleaned, and reused to …

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A Comprehensive Review on Recycled Aggregate and …

This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture …

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Sustainable Construction Exploration: A Review of Multi-Recycling …

This paper provides an overview of literature on the multiple-time recycling of concrete waste and meticulously analyzes the research findings. The paper begins by reviewing the characteristics of recycled materials such as recycled coarse aggregate, recycled fine aggregate, and recycled powder obtained from concrete waste in relation to the recycling …

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Durability evaluation of three generations of repeatedly recycled

Huda et al. [27] studied the mechanical behavior of three generations of repeatedly recycled coarse aggregate concrete. It was found that the first and second generations of recycled concretes (RC) could reach the target strength of 32 MPa at a curing age of 56 d, while the third-generation RC exceeded the target strength by 25% at 120 d. ...

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Recycled Aggregate: A Viable Solution for Sustainable Concrete …

As with C&DW, aggregates obtained from geopolymers are a viable option for the development of AR replacing NA. This information was highlighted in the research by Xu et al., where the authors evaluated the possibility of producing artificial aggregates using geopolymer aggregate concrete for light coarse aggregate. Although the mechanical ...

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