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performance of recycled aggregate concrete based on a new

performance of recycled aggregate concrete based on a new

Performance of recycled aggregate concrete based on a

2015-10-1  A new route for concrete recycling within the European C2CA project is developed. • This novel recycling technology can be performed purely mechanically and in situ. • The process applies ADR to extract high-grade recycled aggregate. • We used ADR recycled aggregates for production of RAC. •

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Performance of recycled aggregate concrete based on a

A new route for concrete recycling within the European C2CA project is developed. • This novel recycling technology can be performed purely mechanically and in situ. • The process applies ADR to extract high-grade recycled aggregate. • We used ADR recycled aggregates for production of RAC. • Results show minor impact of RA on the ...

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Performance of Recycled Concrete Aggregates: A New ...

2021-4-15  Performance of Recycled Concrete Aggregates: A New Study. Posted on April 15, 2021. It is a basic axiom of environmental stewardship. When possible, use old stuff to make new stuff. The same is true with concrete aggregates. Mixes are more sustainable when recycled concrete aggregate (RCA) replaces natural aggregates, at least to a degree.

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Recycled aggregate concrete performance analysis based

2019-1-31  Based on the basic performance analysis results of recycled aggregate concrete, recycled aggregate concrete beams are fabricated. The test designs a recycled concrete beam with a water-cement ratio of 0.4, and the replacement rate of recycled coarse aggregate is 75%.

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Performance of Recycled Aggregate Concrete

2009-9-1  aggregate concrete ,the slump test was about 1.0cm slump for 60 % coarse recycled aggregate concrete and increases as the percent of recycled aggregate decreases . The compressive strength of recycled aggregate concrete with 60 % recycled aggregate, is about 76 % of natural aggregate concrete. The compressive strength increases as the

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Performance enhancement of recycled concrete aggregate

2016-1-20  Recycled concrete aggregate differ from natural aggregate as the former contains hardened cement mortar. The adhered cement mortar on recycled concrete aggregate has higher porosity and water absorption and lower strength than natural aggregate do. ... When a low W/C ratio was used to prepare the new concrete, the new ITZs were less porous than ...

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Surface modification of recycled coarse aggregate based

Recycled aggregate (RA) is obtained by physical crushing and sieving process from the parent concrete. Utilizing RA to replace natural aggregate (NA) is an effective approach to resources conservation, and is significant for the sustainable development ( Kisku et al., 2017 ).

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Evaluation of Recycled Concrete Aggregate Performance in ...

Based on the results of the aggregate testing it was found that concrete incorporating pre-soaked (i.e., fully saturated) RCA as a 100% replacement for natural aggregate had slump values between 22% and 75%, compressive strengths between 81% and 137%, splitting tensile strengths between 78% and 109%, modulus of elasticity values between 81% and ...

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The Utilization of Recycled Aggregate in High Performance ...

2020-7-1  Using Recycled Aggregate (RA) for new high performance concrete (HPC) could be an environmentally friendly solution , , . HPC is a cementitious composite material consisting of Portland cement, water, a high-range water reducer, fine aggregate, and other admixtures [11] .

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Performance Evaluation of the Polyurethane-Based ...

2020-1-30  Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer concrete aggregate is still limited. This study aims to fill this knowledge gap through the experimental investigation on mechanical and durability performance. Specifically, the remolded polyurethane stabilized Pisha

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Recycled aggregate concrete performance analysis based

2019-1-31  Based on the basic performance analysis results of recycled aggregate concrete, recycled aggregate concrete beams are fabricated. The test designs a recycled concrete beam with a water-cement ratio of 0.4, and the replacement rate of recycled coarse aggregate is 75%.

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Performance of Recycled Aggregate Concrete

2009-9-1  aggregate concrete ,the slump test was about 1.0cm slump for 60 % coarse recycled aggregate concrete and increases as the percent of recycled aggregate decreases . The compressive strength of recycled aggregate concrete with 60 % recycled aggregate, is about 76 % of natural aggregate concrete. The compressive strength increases as the

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Durable Performance of Recycled Aggregate Concrete in ...

2021-8-2  Recycled aggregate concrete is an eco-friendly material that is increasingly being used in new constructions. Nowadays, this application is mainly limited by user’s lack of confidence, as coarse recycled aggregate (CRA) is usually more porous, i.e., it has a higher water absorption, than coarse natural aggregate.

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Durable Performance of Recycled Aggregate Concrete in ...

Recycled aggregate concrete is an eco-friendly material that is increasingly being used in new constructions. Nowadays, this application is mainly limited by user’s lack of confidence, as coarse recycled aggregate (CRA) is usually more porous, i.e., it has a higher water absorption, than coarse natural aggregate.

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(PDF) Recycled aggregates in concrete: a performance ...

Recycled aggregate performance requirements in order to achieve concrete within a given w/c correction factor range of RU-N concrete Aggregate characteristic The w/c reduction factor to produce equivalent performing concrete to RU-N concrete > 0.95 > 0.9 > 0.8 Maximum LA coefficient 29 40 55 Minimum density, SSD: kg/m3 2500 2375 2150 Maximum ...

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Mechanical Performance of Concrete Made with Recycled ...

2020-9-15  This research aims at analysing the mechanical performance of concrete with recycled aggregates from concrete pavements. First, the characteristics of various natural and recycled aggregates used in the concrete were thoroughly analysed. The composition of the recycled aggregates was determined and several physical and chemical tests of the

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Recycled aggregates in concrete: a performance-related ...

2020-3-10  To develop this performance-related approach, concrete mixes were cast and tested using combinations of unbound stone, crushed concretes and crushed bricks. From the results, three classes of recycled aggregates have been derived based on Los Angeles coefficient, aggregate absorption, density and drying shrinkage of the combined coarse aggregate.

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Advances and New Challenges for Recycled Aggregate

2021-12-3  Advances and New Challenges for Recycled Aggregate Concrete. 2Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic. The world’s waste production is at its highest level ever following the development of new world powers.

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Performance Evaluation of the Polyurethane-Based ...

Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer concrete aggregate is still limited. This study aims to fill this knowledge gap through the experimental investigation on mechanical and durability performance

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Performance Evaluation of the Polyurethane-Based ...

2020-1-30  Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer concrete aggregate is still limited. This study aims to fill this knowledge gap through the experimental investigation on mechanical and durability performance. Specifically, the remolded polyurethane stabilized Pisha

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Performance of recycled concrete aggregate pavements

2018-7-30  The principles of sustainability dictate that construction materials should be recycled whenever possible. In the US, it is a common practice to crush old concrete pavements at the end of their service lives into recycled concrete aggregate (RCA) for use in the base course of new pavements but not to use the RCA in the new concrete pavement layer itself.

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Durable Performance of Recycled Aggregate Concrete in ...

Recycled aggregate concrete is an eco-friendly material that is increasingly being used in new constructions. Nowadays, this application is mainly limited by user’s lack of confidence, as coarse recycled aggregate (CRA) is usually more porous, i.e., it has a higher water absorption, than coarse natural aggregate.

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Performance of Recycled Aggregate Concrete in a Real ...

2021-7-9  Abstract. Though a large amount of research has been carried out on recycled aggregate concrete (RAC) during recent years, the application cases of RAC in real structures are still very few in China. This paper reports the application of RAC in a real project. Two beams made of RAC and commercial natural aggregate concrete (NAC) respectively ...

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(PDF) Recycled aggregates in concrete: a performance ...

Recycled aggregate performance requirements in order to achieve concrete within a given w/c correction factor range of RU-N concrete Aggregate characteristic The w/c reduction factor to produce equivalent performing concrete to RU-N concrete > 0.95 > 0.9 > 0.8 Maximum LA coefficient 29 40 55 Minimum density, SSD: kg/m3 2500 2375 2150 Maximum ...

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Using Recycled Concrete Aggregate in New Concrete

2017-8-14  Using recycled pavement as aggregate in new concrete mixes can save money and promote environmental sustainability. New design methods published in a new research report allow engineers to create more durable mixes from recycled aggregate than in the past, reducing the need for virgin aggregate, a diminishing and expensive resource.

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Use of Recycled Aggregates in Construction

2021-9-16  Recycled Aggregates Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% brick content. Partial replacement (30%) for natural aggregate in concrete for sidewalks ...

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Study on the Effect of Recycled Coarse Aggregate on the ...

2021-11-29  Shrinkage property is a significant indicator of the durability of concrete, and the shrinkage of green recycled concrete is particularly problematic. In this paper, construction waste was crushed and screened to generate simple-crushed recycled coarse aggregate (SCRCA). The SCRCA was then subjected to particle shaping to create primary particle-shaped recycled

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Recycled Concrete Aggregates: A Review International ...

2013-3-29  Flexural performance of steel-reinforced recycled concrete beams. ACI Structural Journal,106(6), 858–867. Google Scholar Froudinstou-Yannas, S. (1977). Waste concrete as aggregate for new concrete. ACI Journal,74, 373–376. Google Scholar JIS. (2011). Recycled aggregate for concrete-class H (JIS A 5021:2011). Tokyo: Japan Concrete Institute ...

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(PDF) Performance Evaluation of the Polyurethane-Based ...

2021-12-1  PDF Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer... Find,

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Effect of different substitution of natural aggregate by ...

2014-12-27  The objective of this research was to incorporate recycled aggregate into pervious concrete to create a very sustainable concrete product for many applications. The research methodology interested replacing natural aggregate with recycled aggregate in the pervious concrete production at 4 different replacement levels of 25, 50, 75 and 100 %, with two

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