Recycled Concrete Aggregates: A Review | International …
By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1). This paper focuses on coarse RCA which is the …
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Internal corrosion characteristics of endogenous sulfate …
The waste concrete can be used to produce a variety of recycled materials, such as recycled aggregates (RA), recycled cementitious materials, recycled fibers, recycled glass and recycled rubber etc. (Jiang et al., 2022; Liu et al., 2022; Lu et al., 2023; Zhang et al., 2023a, Zhang et al., 2023b). The application of RA can not only …
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Examining the structural viability of recycled fine aggregates …
This study investigates the potential of incorporating recycled fine aggregates (RFA) into sustainable concrete. In this research, a conventional compaction technique is utilized to establish the order of compressive strength and, consequently, to assess particle packing density in terms of weight within a specific cylindrical volume and evaluate …
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Sustainable Construction Exploration: A Review of Multi …
Given that the quality of recycled concrete materials is one of the many factors influencing the properties of concrete (Kim 2022), it is of great significance to …
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A comprehensive review on the use of recycled concrete …
This disparity is associated with the cement and aggregate composition from parent crushed concrete and adhered cement paste characteristics (contamination, deterioration) (Katz, 2003). As shown in Fig. 7, the principal chemical oxides in RCA are silica (SiO 2 ), alumina (Al 2 O 3 ), and ferrite (Fe 2 O 3 ).
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Mechanical performance of recycled aggregate concrete in …
RBCA concrete can be used in the production of pervious concrete [119], [120], and can be used in situations where water seepage is required, such as pavement bricks, etc. RBCA concrete can be used in the research of sound insulation materials, such as non–load–bearing walls [121], due to its porous characteristics.
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Carbon Footprint of Recycled Aggregate Concrete
19. CO 2 emission rates for various components and processes are taken into account to calculate the carbon footprint of concrete mixes (Note: E1 determined using energy intensity for water supply ...
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A review on recycled concrete aggregates (RCA) characteristics …
A study on ultra-high-performance fibre-reinforced concrete (UHPFRC) has shown the promising behaviour of locally available low-cost synthetic fibre reinforcement and the benefits of recycled ...
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Analysis of Shear Characteristics of Recycled Concrete …
Recycled concrete aggregate (RCA) has been widely used as a resource in reinforced soil structures, especially as a substitute for natural aggregate. ... Yan, F. X., X. H. Bai, and X. Q. Dong. 2020. "Experimental study of the frictional resistance characteristics of geogrids and construction residue interface." Rock Soil Mech. 41 …
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Recycling of glass fibre reinforced polymer (GFRP) …
1. Introduction. Due to the advantageous characteristics of high strength-to-weight ratio, resistance to corrosion and unprecedented flexibility, fibre-reinforced polymer (FRP) composites have been utilised in more industries than ever before, such as transportation, aerospace, marine and construction industries [1].As the market for FRP …
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Strength and Deformation Characteristics of Recycled Concrete Aggregate
A series of consolidated drained triaxial compression tests were performed on recycled concrete aggregates to investigate the feasibility of their use as a backfill material for geotechnical engineering structures requiring a high stability while allowing a limited amount of deformation, such as embankments and conventional type and geosynthetic …
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Application of Recycled Concrete in Construction Based on …
The application of recycled concrete in construction projects can make rational use of industrial waste and realize the renewable and effective recycling of natural resources [].The use of recycled concrete for construction can to a large extent improve the quality of concrete through new technology and equipment and reduce the waste …
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Reinventing concrete: a comprehensive review of …
It's a creative approach to reuse recycled plastic in the building sector rather than landfilling it. Nevertheless, most concrete characteristics have been impacted by the use of recycled plastic aggregates (RPA). Several methods, including treating the RPAs' surface, were used in earlier studies to reduce the harmful impact of the RPAs on the …
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Capillary Water Absorption Characteristics of Recycled …
Q20andQ40isgraduallyhigherthanthatofQ0,buttheloss trendofQ20andQ40isalmostthesame.After300cyclesof freeze …
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Effects of fine aggregate content on the unsaturated …
Recycled concrete aggregate (RCA) can be used in landfill and slope cover systems, where its unsaturated hydraulic properties play an important role. The hydraulic behavior of RCAs can be potentially controlled through mixing coarse and fine aggregates by a pre-determined proportion, which lacks experimental validation. In this study, water retention …
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Liquefaction characteristics of recycled concrete aggregates
The results from a series of repeated load triaxial tests on recycled concrete aggregate (RCA), crushed bricks (CB), and waste excavation rock (WR) reported that most of the recycled C&D materials produced comparatively smaller permanent strain and greater resilient modulus than those of the commonly used granular subbase natural …
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Use of a Conductive Recycled Mortar as an Anode in the
This study advocates for the use of recycled materials, which are more environmentally sustainable as they decrease natural resource consumption. In this research, a mortar anode composed of recycled fine aggregate (RFA) from laboratory concrete blocks, carbon fiber (CF) waste from industrial processes, and graphite …
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Carbon Footprint of Recycled Aggregate Concrete
In this paper, carbon footprint was used to compare the environmental performance in the production phase of a concrete made with both recycled and crushed limestone …
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Meso-scale damage characteristics of low carbon concrete with recycled
DOI: 10.1016/j.conbuildmat.2022.130014 Corpus ID: 254772926; Meso-scale damage characteristics of low carbon concrete with recycled aggregate based on in-situ CT test @article{Zhang2023MesoscaleDC, title={Meso-scale damage characteristics of low carbon concrete with recycled aggregate based on in-situ CT test}, author={Yichao …
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Recycled Materials in Concrete
Durability and performance characteristics of recycled aggregate concrete. Paper 090 CSIRO Publishing, UK. Google Scholar Siddique, R., & Naik, T. R. (2004). Properties of concrete containing scrap tyre rubber—an overview. Waste Management, 24(6), 563–569. Article Google Scholar
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JRM | Utilization of Recycled Concrete Powder in Cement …
Utilization of Recycled Concrete Powder in Cement Composite: Strength, Microstructure and Hydration Characteristics. Xi Chen 1,2, Ying Li 1,2,*, Hualei Bai 1,2, Liyuan Ma 1,2. 1 School of Civil Engineering, Qinghai University, Xining, 810016, China 2 Qinghai Provincial Key Laboratory of Energy Saving Building Materials and Engineering Safety, Xining, …
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recycled concrete Topic
The reason for recycling is the reduction of waste in order to protect nature against pollution, the increasing shortage of suitable dumping grounds, and to save energy and natural resources. Concrete debris is typically reclaimed as recycled aggregate (RCA). By recycling concrete, valuable landfill space and natural resources are …
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Strength and durability of concrete containing recycled concrete
The original concrete characteristics, the recycling process and the size fraction of aggregates are the three most important factors determining the properties of recycled concrete aggregates [5]. The replacement of natural aggregates in a concrete mix can be done either by weight or by volume.
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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 …
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Analysis of pressure damage characteristics of carbon fibre recycled …
In order to understand the pressure damage of concrete under different levels of carbon fibre content, a method for analysing the pressure characteristics of carbon fibre recycled concrete based on acoustic emission technology is proposed. First is the selection of materials in the preparation of the carbon fibre reinforced recycled …
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The enhancement of engineering characteristics in recycled …
The enhancement of engineering characteristics in recycled aggregates concrete combined effect of fly ash, silica fume and PP fiber. Author links open overlay panel Mohammad Alharthai a, ... Recycled concrete aggregate has a lower saturated dry density compared to natural aggregate, and this difference rises with aggregate size. ...
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(PDF) A review on concrete recycling
Recycled concrete, when appropriately processed and mixed, can exhibit similar structural properties to conventional concrete, making it a viable option for retrofitting projects.
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The morphological characteristics of brick-concrete recycled …
Due to the complication of sources and types of CDW, there are great differences in properties among recycled coarse aggregates [6, 7].Most of the demolished buildings in Chinese cities are brick-concrete structures built in the 1960s–1980s, and such recycled aggregates are mainly composed of crushed brick aggregate and crushed …
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Fracture process zone characteristics and identification of …
The cracking in recycled concrete initiates earlier; the fracture length is generally larger and the use of high proportion of recycled aggregate results in higher strain gradients in the fracture process zone. ... The characteristics of recycled aggregate and ITZ can highly influence the mechanical properties of RAC [9], [11], [12], [13 ...
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Utilization of Recycled Concrete Powder in Cement …
The production of recycled concrete powders (RCP) consists of three steps. First, a waste concrete beam member was crushed into bricks by hand (Fig. 1a), then crushed by a jaw crusher and screened to obtain particles under 0.15 mm as recycled fines. Finally, the recycled fines were pulverized in a PM2L planetary ball mill for 30 min and ...
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