Application of artificial bee colony programming techniques …
Application of artificial bee colony programming techniques for predicting the compressive strength of recycled aggregate concrete. ... Recycled aggregate concrete is a type of environmentally-friendly concrete in which natural aggregates are substituted by recycled aggregates. Compressive strength is considered as one of the most important ...
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Application of Aggregates from Construction and …
For instance, Allali et al. [41] conducted a study on the application of 60% recycled concrete aggregate (with a size of 4.75–19 mm) and 40% sand (with a size of 0–2.36 mm) as a …
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Application of Recycled Concrete Aggregate in Road …
Typical CBR test results for RCA Acta Sci. Pol. 55 Application of recycled concrete aggregate in road engineering The disturbances during the CBR test may be caused by loose grains on top of the CBR cylinder and the crushing process. The crushing phenomenon was previously studied. The RCA tends to undergo crushing even during the Proctor tests ...
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A Comprehensive Review on Recycled Aggregate and …
For around 70 years, research has showed that using recycled aggregates (RAs) from CDW to replace natural aggregates (NAs) in new concrete application as recycled aggregate concrete (RAC) can provide benefits for the environment and economy.
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Sustainable Materials: A Review of Recycled …
Surface image of natural and recycled concrete aggregates (a, c, e: Recycled concrete aggregate; b, d, f: Natural aggregate) (64-66). Figures - uploaded by Ali Mardani Author content
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The Application of Recycled Concrete Aggregate (RCA) …
the utilization of Recycled Asphalt Pavement (RAP) aggregate and Recycled Concrete Aggregate (RCA) have been performed over the past twenty years and have utilized various testing protocols (Kandhal et al., 1995; Sondag et al., 2002; Tam et al., 2004). In one of the early studies on recycled aggregate, Ramzi
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Structural engineering applications of recycled aggregate …
In this paper, the most-concerned questions of recycled aggregate concrete (RAC) application, i.e., the structural safety performance, the availability of design code and project experience, and ecological and economic costs, are overviewed, aiming to find the answer to whether it is feasible to apply RAC in main structural components technically and practically.
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Sustainable Materials: A Review of Recycled Concrete Aggregate …
A Review of Recycled Aggregate in Concrete Applications (2000–2017). Construction and Building Materials, Vol. 172, 2018, pp. 272–292. Crossref. Google Scholar. 10. Slattery K. Global Developments in the Aggregate Industry – …
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Recycled Aggregate: A Viable Solution for Sustainable …
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 …
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Use Of Recycled Coarse Aggregate In Concrete
The largest application of recycled concrete aggregate is for the overall base coarse of road construction. Discover the world's research. 25+ million members; 160+ million publication pages;
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Application of recycled aggregate porous concrete pile …
Since the recycled aggregate is obtained from various origins, physical properties of the aggregate are not uniform, which leads to difficulties in the application of the recycled aggregate for new concrete structures . However, the gradation control of the recycled aggregate, which was reproduced by crushing concrete waste, can overcome this ...
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Modification of recycled aggregate and conservation and application …
Different raw materials should be used to prepare RA for various applications of recycled aggregate concrete (RAC). In instances of low design strength, RA can be produced from standard CDW [18]. RA should be prepared in scenarios with higher design strengths by selecting regional concrete from load-bearing columns with higher original ...
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Recycled Concrete Aggregate
Recycled aggregate concrete (RAC) is a new type of concrete produced using crushed, screened, and washed recycled aggregate obtained from waste concrete to replace natural aggregate (NA) partially or completely [1]. ... Therefore, it will facilitate the applications of recycled concrete aggregate if the adhered cement mortar can be enhanced ...
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The application of Recycled Concrete Aggregate (RCA) for …
Recycled Concrete Aggregate (RCA) is different from natural aggregate because of RCA's cement paste and contaminants that cause low density and high porosity. In many cases, these properties of RCA that lead to poor engineering qualities are the major reasons that RCA is not recommended as aggregate for Hot Mix Asphalt (HMA). In this research, the performance …
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Fiber-reinforced recycled aggregate concrete with crumb …
Concrete is a composite material used worldwide as a major construction material [1].Nearly 1.5 billion tons of crushed stone were produced in 2021 for concrete production, a 3% increase compared to 2020, which saw a production of over 1.47 billion tons of crushed stone [2].This significant increase in aggregate demand resulted in the depletion of natural resources …
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Real-scale applications of recycled aggregate concrete
Mechanical properties of recycled aggregate concrete proportioned with modified equivalent mortar volume method for paving applications Constr. Build. Mater., 136 ( 2017 ), pp. 9 - 17
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APPLICATION OF RECYCLED AGGREGATE IN CONCRETE : A …
This study presents an overview of the development and application of recycled aggregate in the production of concrete. Nowadays, in a large part of the world, demolition of old and deteriorated buildings and traffic infrastructure, and their replacement with new ones is a usual phenomenon. As a consequence, the volume of demolished concrete is increasing day by day, which …
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Application of ferronickel slag as fine aggregate in recycled aggregate
Industrial and construction solid waste regarded as a hazardous material has given rise to the potential threats of environmental pollution. The ferronickel slag (FNS) as an industrial by-product and recycled concrete aggregates (RCAs) derived from construction and demolition wastes have potential for sustainable use as the fine and coarse aggregate in concrete, …
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Optimizing sustainable concrete mixes with recycled aggregate …
Concrete is the world's most extensively manufactured material, with the integration of recycled materials becoming crucial for sustainable construction. This study investigates the mechanical properties of concrete mixes containing Recycled Aggregates (RA) and Portland Slag Cement (PSC) to understand their suitability for sustainable construction applications. Utilizing …
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A comprehensive review on the use of recycled concrete aggregate …
Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and mechanical characteristics must be investigated before use (Mills-Beale and You, 2010). As previously discussed, it is important to note that these properties would differ from the ...
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Use of recycled aggregates arising from construction and demolition
In the light of the ever-increasing need of circular economy in the construction industry and of the recent advances in research and development on the use of recycled aggregates, produced from construction and demolition waste, in new construction materials, this paper presents a compilation of representative case studies of several applications, namely …
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Recycled aggregates from construction and demolition …
For recycled concrete aggregate from concrete waste, the use of up to 90% of recycled aggregate is allowed if water absorption is at most equal to 10% and content of contaminants up to 0.2%; meanwhile, for recycled concrete aggregate from demolition waste, the content of recycled aggregate is limited to 70%, while the limits for water ...
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Mechanical performance of recycled aggregate concrete in …
The use of recycled aggregate concrete can save natural resources and reduce environmental pollution, which has been widely concerned in recent years. ... Finally, the application of two kinds of recycled concrete is discussed, and some ways of energy saving and environmental protection are proposed. 2. Physical properties of aggregate.
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Application of Intensification Approaches on Recycled Aggregate
Download Citation | Application of Intensification Approaches on Recycled Aggregate | The wasted cement mortar and internal cracks induced by the secondary breaking process existing on/in recycled ...
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Application of Conventionally Recycled Coarse Aggregate …
This paper aims to establish a technique for easy concrete recycling as a solution essential for the creation of a closedloop recycling society. The technique introduced in this study enables improvement of the recovery rate of original aggregate by enhancing the peeling-off effect of aggregate without any degradation of mechanical properties. The enhanced peeling-off effect …
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Application of recycled coarse aggregate by mixture to …
Request PDF | Application of recycled coarse aggregate by mixture to concrete construction | With regard to the technology for producing aggregate of recycled concrete from concrete blocks, a ...
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Recycled concrete for structural applications
This chapter deals with the suitability of recycled aggregate concrete for structural applications, with emphasis on coarse recycled aggregates produced from concrete waste. The feasibility of recycled aggregate concrete has been consistently reported worldwide and technical bodies are becoming increasingly receptive to the use of recycled ...
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A review of recycled aggregate in concrete applications …
Pavements, footpaths and other civil engineering applications of recycled aggregate 6.1. Roadway infrastructure A pavement is a multi-layer system which directly supports traffic and transmits the vehicular load to the road base. It consists of a concrete slab or asphalt slab resting on the foundation system formed by several overlapping layers ...
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Recycled Concrete Aggregates: A Review
After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is …
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Recycled Aggregate Concrete for Structural Use – An …
Recycled aggregate is classified into three types according to composition and density, and the maximum content of various contaminants is limited, Table 7.3. Table 7.4 shows the maximum allowed replacement percentage of recycled aggregate depending on aggregate type, concrete strength class and exposure conditions.
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