Materials | Special Issue : Recycled Aggregate Concrete and
For full incorporation of coarse recycled concrete aggregates and the design of elements without shear reinforcement, the calibrated partial factor reduces the design value of shear resistance by 10% (design with EN1992) or 15% (design with prEN1992) in comparison to natural aggregate concrete's design.
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Recycled Concrete Aggregate
Reuse of recycled aggregate in the production of alkali-activated concrete. P. Chindaprasirt, T. Cao, in Handbook of Alkali-Activated Cements, Mortars and Concretes, 2015 19.2 A brief discussion on recycled aggregates. Recycled aggregate is defined as aggregate resulting from the processing of inorganic or mineral material previously used in construction (BS EN 12620, …
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Optimal Replacement Ratio of Recycled Concrete Aggregate …
Significant construction and demolition waste (CDW) is produced by many useless concrete buildings, bridges, airports, highways, railways, industrial mining, etc. The rising need for new construction has increased the use of natural materials, impacting the ecosystem and incurring high costs from mining natural aggregates (NA) and processing CDW. The concept …
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Strength and Durability Performance of Recycled Aggregate …
AbstractThe present study illustrates the susceptibility of optimized-quality recycled concrete aggregate (RCA) to supplementary cementitious materials (SCMs), such as silica fume (SF), ground granulated blast slag (GGBS), and mechanically produced ...Practical ApplicationsAbout 20% to 30% of recycled fines (M-Fines) below 150μm are generated during RCA …
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Using and optimizing the recycled aggregates in concrete: A …
The machine learning model for predicting compressive strength in addition to compressive stress modulus and graphs for recycled aggregate concrete are reviewed, as well …
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Recycled Sand and Aggregates for Structural …
Concrete recycling to produce aggregates is crucial in reducing the demand for materials in the construction industry, particularly for the most widely used building material—concrete. A potential solution to enhance the …
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Recycled aggregates from construction and demolition waste …
Journal of Building Engineering. Volume 52, 15 July 2022, 104452. ... 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 ...
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Incorporating coarse and fine recycled aggregates into concrete …
Concrete waste (CW) recycling stands as a promising strategy to promote sustainable construction practices. This research aims to assess the feasibility of using recycled concrete aggregates (RCA) as a surrogate for natural aggregates (NA) in concrete applications and reduce the environmental impact associated with the depletion of natural resources and …
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Studies on Hemp and Recycled Aggregate Concrete
This paper reports on the first phase of a multi-phase research program conducted at the American University of Beirut (AUB) on "Hemp and Recycled Aggregates Concrete" (HRAC). HRAC is a new sustainable concrete material where hemp fibers are incorporated in the mix, the coarse aggregate content is reduced by 20% of the concrete volume, and 50% of the …
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Enhancement of Mechanical Properties and Freeze–Thaw
Recycling construction demolition waste as aggregates for concrete production is a sustainable solution to reduce its environmental impact and challenges. However, recycled concrete aggregate (RCA) possesses inferior physical properties as compared to natural coarse aggregate. Thus, concrete prepared with recycled aggregate has poor mechanical and …
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A Comprehensive Review on Recycled Aggregate and Recycled …
Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built …
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Mechanical Properties and Durability of Recycled Aggregate
The recycled aggregate permeable concrete made of reused construction wastes is very important for realizing the sustainable development of the construction industry, it can alleviate the adverse impact of surface runoff during storm and the urban heat island effect. ... Performance and durability of self compacting concrete using recycled ...
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Greener Concrete Paving Blocks with Hybrid Alkaline Cements …
The simultaneously use of an alternative binder and recycled aggregates in a concrete composition targeting the development of a concrete plain product (paving block) can be considered an additional contribution to previous studies that addressed those two research topics mostly in isolation within the context of the design of more sustainable ...
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Use of Recycled Aggregate Concrete
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) ISSN: 2278-1684, PP: 52-59 ... Use of Recycled Aggregate Concrete Mr. Tushar R Sonawane1,Prof. Dr. Sunil S. Pimplikar2 1research Graduate Maeer's Mit Pune, 2h. O. D. Civil Engg.Department, Maeer's Mit Pune. ABSTRACT: Use of recycled aggregate in concrete can be useful for ...
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Use of recycled aggregate concrete in structural …
Notable examples include studies on: recycled concrete aggregate properties with amounts of old adhered mortars (Duan and Poon Citation 2014), the current status on the use of recycled aggregates in concrete (De Brito and …
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Recycled Concrete Aggregates Utilization in Construction: …
Recycled Concrete Aggregates (RCA) are the product of recycling Concrete and Demolition Wastes (CDWs) from the construction industry. The practice aims to effectively dispose of, manage, and treat solid wastes that could pose health, safety, and environmental concerns. To address these impending problems, CDWs are valorized into RCA as a …
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Use of fine recycled concrete aggregates in concrete: A critical …
Journal of Building Engineering. Volume 38, June 2021, 102196. Use of fine recycled concrete aggregates in concrete: A critical review ... The coarse recycled concrete aggregates …
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Polymeric Actions to Make Recycled Aggregate of Concrete …
The restricted reuse of recycled concrete aggregate (RCA) can be justified, even in part, by the impact on strength and durability of new RCA-based concrete, instead of natural aggregates. ... Arun Serawat, Prashant Sharma, Prakash Singh. Polymeric Actions to Make Recycled Aggregate of Concrete Improved. Journal of Polymer and Composites. 2023 ...
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Recycled Aggregate: A Viable Solution for Sustainable …
Schematic illustration of C&DW in concrete [] in (a); scanning electron microscopy of mortar containing 40% C&DW [] in (b).Another negative feature of C&DW is its heterogeneity [].Exemplifying this negative aspect, Figure 3 presents the main …
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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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Impact Splitting Tensile Properties of Fly Ash–Recycled Aggregate Concrete
This paper aims to study the impact splitting tensile properties of fly ash–recycled aggregate concrete (FARAC). The splitting tensile tests of FARAC with different replacement rates of recycled aggregate (0%, 30%, 50%, ) and different fly ash contents (0%, 10%, 20%, 30%) were carried out by using split Hopkinson pressure bar (SHPB) under different impact …
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Recycled Concrete Aggregates: A Review | International Journal …
Compressive strength of RCA concrete can be influenced by the properties and amount of recycled aggregate. Several factors can influence the compressive strength in RCA concrete, including the water/cement (w/c) ratio, the percentage of coarse aggregate replaced with RCA, and the amount of adhered …
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Axial Compressive Behavior of FRP-Confined Compression-Cast Recycled
Fang Yuan, Mingkang Wang, Yufei Wu, Jinlong Pan, Overcoming the brittleness of sustainable compression-cast recycled aggregate concrete through steel spiral confinement, Journal of Building Engineering, 10.1016/j.jobe.2024.110634, 96, (110634), (2024).
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Treatments for the Improvement of Recycled Aggregate | Journal …
The microstructure of recycled aggregate prepared from the crushing of old concrete was studied. It was found that the recycled aggregate is covered with loose particles that may prevent good bonding between the new cement matrix and the recycled ...
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Concrete Mix Design of Recycled Concrete Aggregate (RCA): …
Recycled concrete aggregate (RCA) has been widely adopted in construction and emerged as a sustainable alternative to conventional natural aggregates in the construction industry. However, the study of holistic perspectives in recent literature is lacking. This review paper aims to provide a comprehensive analysis of RCA, highlighting its properties, …
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Experimental Investigation on Pervious Recycled Aggregate Concrete …
Residual compressive and flexural strength of a high strength recycled aggregate concrete. International Journal of Scientific Development and Research, 6(6), 182-195. Çakir, O. (2014). Experimental analysis of properties of recycled coarse …
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(PDF) Recycled concrete aggregates and their influence on …
Former Editor – Indian Concrete Journal (ICJ) ... Figure 3.2: Process involved in producing recycled aggregates from concrete waste obtained from sites. Figure 3.3: Process …
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Comprehensive Review Of Recycled Aggregate Concrete In …
Ammon Katz, (2003) "Properties of concrete made with recycled aggregate from partially hydrated old concrete", Cement and Concrete Research, 33, 703 – 711. Katz, A. …
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Studying the usability of recycled aggregate to produce new concrete
Mixing and specimen preparation. Table 2 displays the quantities of each element, namely cement, fine aggregate, coarse aggregate, and recycled coarse aggregate. Moreover, Table 2 accurately computed the optimal blend ratios for casting each design, using the specified amounts of constituents in cubic meters. The concrete mixture specified in Table 2 is intended …
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Mix Design for Pervious Recycled Aggregate Concrete
The water absorption for 20 and 13 mm recycled concrete aggregates was 5.3 and 8.2 %, respectively, compared to 1.0 % for the natural aggregate. High water absorption and lower specific gravity for 13 mm recycled concrete aggregate are due to increased amount of weak attached mortar compared to that for 20 mm recycled concrete aggregate.
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