Four brick designs were developed and manufactured using a hydraulic press, incorporating recycled concrete fines (RF) or carbonated recycled concrete fines (CRF) as both filler and binder materials. The experimental study revealed the self-cementing ability of RF, exemplified by a compressive strength exceeding 13.8 MPa in the RF-based brick.
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What's more, the calculation results show a potential of significantly carbon sink; for every ton of recycled cement produced, the CO2 emission could be reduced by 0.35–0.77 tons compared to ...
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The tested material consisted of cement CEM I 42.5R (Radotin), crushed bricks fraction 2-5 mm, 0-4 mm sand and micronized recycled concrete fraction 0-0.125 mm. Individual material samples ...
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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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By linking the recycling of two carbon-intensive materials—cement and steel—researchers have hit upon a breakthrough that dramatically cuts the climate impact of both. Let the best of Anthropocene come to you.
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The utilization of recycled cement concrete (RCC) will be helpful to achieve the goal of carbon peak and carbon neutrality, especially the treatment of RCC by carbonation, which will improve the RCC's properties. In this article, RCC was crushed and sieved into 6 grades of aggregate and powder according to the particle size. ...
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There is increasing support for a performance-based approach in cement and concrete standards instead of the restrictive prescriptive style in use [19,209,217]. Strategy for Commercialisation. Figure 9 outlines a conceptual flow diagram of the various steps and driving forces for the wider commercial adoption of low-CO 2 cement and concrete. As ...
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Recycled concrete can easily be used for other construction projects and can even be ground finely to serve as gravel and re-installed into driveway and patios. By recycling your concrete with local concrete contractors or masons, you're also giving back to smaller businesses within your city, which can significantly help any contractor ...
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Recycled concrete means that you crush or pulverize the demolished concrete structure or structural elements and reuse the crushed concrete for future concrete construction works. Now, this process requires a serious of procedural steps and cannot be casually taken for granted. The aim of recycling concrete is not just to reduce the consumption of natural …
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Recycled concrete aggregates (RCA) are used in existing green building composites to promote the environmental preservation of natural coarse aggregates (NCA). Besides, the use of RCA leads to potential solutions to the social and economic problems caused by concrete waste. It is found that insufficient information on the longevity and sustainability of …
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Researchers from the University of Cambridge have developed a method to produce very low-emission concrete at scale – an innovation that could be transformative in the transition to net zero.
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Guidance on the definitions and use of recycled aggregate in concrete can be found in the following resources: Specifying Sustainable Concrete publication ; MPA Cement Fact sheet 6 – Use of recycled aggregates in concrete ; What is Concrete – aggregates -definitions; Alternative recycled and secondary resources for concrete manufacture
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In a recent development, researchers have unveiled a transformative method to produce low-emission concrete on a large scale using recycled cement. This innovation promises to be a significant step towards …
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This study analyzed environmental impacts and economic feasibility to evaluate whether recycling fly ash, which has rarely been addressed in previous studies, as a raw material for lightweight aggregates can be a sustainable waste management alternative. This study presents a comparative analysis of three disposal scenarios: landfill disposal, recycling as …
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To study the effect of parent concrete strength on the recycling of the concrete waste as a cement replacement, the sample cores (Fig. 1a) were classified into three groups based on their compressive strength determined by the standard destructive test: low-strength concrete in the range of 20–25 MPa (RCP-L); medium strength concrete in the ...
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Cantero et al. simultaneously replaced 10–25% Portland cement with ground recycled concrete (GRC) and 0–50% NA with C&DW RA, evaluating the mechanical behavior of concrete. The authors found that the concrete containing 10% GRC and 50% C&DW RA achieved the same strength class as the Portland cement concrete. He et ...
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Recycling concrete waste and incorporating recycled materials into new concrete mixes can help reduce waste generation and contribute to a more sustainable construction industry [9], [13], [15]. Cost and affordability also pose challenges in conventional concrete production, especially for large-scale construction projects.
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During the demolition and recycling process the specific surface area per volume of concrete is significantly increased. As a result, the potential for CO 2 absorption by carbonation of the cement hydrates is enhanced. In this study, recycled concrete aggregates (RCA) with varying moisture contents are carbonated with CO 2 at atmospheric pressure. . The …
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The demolition of old structures in concrete generates materials which can be recycled in the form of aggregates for new concrete, thus preserving natural resources. These recycled concrete aggregates are composed of natural elements bounded with hardened hydrated cement paste. The fine fraction (sands and fillers) is however more difficult to reuse than …
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On one hand, the use of recycled materials in cement and concrete production helps to reduce raw materials and urban land occupation. However, on the other hand, the …
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Recycled concrete aggregate is considered as the most abundant and used secondary aggregate in concrete production, other types of solid waste are also being used in concrete for specific purposes ...
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Concrete is a building material consisting of a mixture of gravel, sand, cement, and water. It is one of the most widely used materials on earth. The concrete industry generates harmful effects on the environment. The cement industry is a testimony to the air pollution generated by greenhouse gases. The use of mussel shell waste as a substitute for concrete …
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Recycled aggregate concrete (RAC) is recognized as an environmentally friendly construction material derived from reclaimed concrete components. This paper aims to conduct a comprehensive scientometric analysis of RAC research published between 2000 and 2023 in the Web of Science core database. The study includes analyses of publication trends over time, …
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Recycling concrete diverts this waste, extending the life of landfills and reducing the need for new ones. Lower Carbon Emissions: The production of new cement, a key …
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This waste can include chunks of concrete, concrete slabs, concrete blocks, and other concrete debris. Crushing: The collected concrete waste is then crushed using heavy machinery such as jaw crushers, impact crushers, or cone crushers. The crushing process breaks the concrete into smaller pieces, commonly known as recycled concrete aggregate ...
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A Study of Strength Characteristics of Recycled Glass (Cullets) in Concrete Floor Tiles Prodution Aikulola O.A Sanni H.A Civil Engineering Department,Federal Polytechnic Ilaro E-Mail; olumuyiwaaikulola2002@gmail Abstract The utilization of recycled glass in construction, such as its application in highway pavement construction,
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Approximately 10 % of global anthropogenic CO 2 emissions arise from the cement and concrete industry driven by urban expansion and a constant need for infrastructure renewal. Reusing waste CO 2 to make new construction materials produces circular carbon flows and constitutes a key step toward a carbon-negative economy. To establish a holistic view of the …
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Recycled concrete aggregate is considered as the most abundant and used secondary aggregate in concrete production, other types of solid waste are also being used in concrete for specific purposes ...
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Concrete waste takes a major portion in generated C&D wastes and can be converted into various sizes of recycled concrete aggregates (RCA) in the recycling plants for different applications. RCA typically has higher strength than other types of recycled C&D wastes like crushed bricks (CB) and mixed recycled aggregates (MRA) [7], [8].
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On one hand, the use of recycled materials in cement and concrete production helps to reduce raw materials and urban land occupation. However, on the other hand, the recycled materials used as partial replacement of raw materials influence properties of final product. This paper reviews the different uses of recycled materials in cement and ...
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