Innovative technologies for recycling End-of-Life concrete
Commonly, recycling of concrete begins with crushing EoL concrete waste to produce a granular product of given particle size. Current crushing trends for the purpose of providing references for further research and practical application about the quality improvement of RCA, in this paper, various treatment Treatment Methods for the Quality Improvement of
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Rebuilding with Recycled Concrete ASME
There are multiple benefits to recycling and re-using that concrete to build in or near the same space. Large volumes of waste now sent to landfills could be greatly reduced, along with the amount of While concrete recycling is crucial to protecting the environment, its implementation in practice is low in many countries. This study aims to highlight challenges to concrete recycling. To achieve that aim, the study objectives are (1) to identify the main challenges to concrete recycling in construction projects; (2) to compare the main Main Challenges to Concrete Recycling in Practice MDPI
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An Overview of Existing Application of Recycled Concrete in China
China is one of the largest producers of construction and demolition (C&D) waste (2.4 billion tonnes in 2015), but the average recovery rate was only approximately 5% in 2017 (Huang et al. 2018 ). In particular, recycling C&D waste is in an urgent need, as this waste stream has consumed a large amount of useful land resources (Li et al. 2020 ).RCA have higher porosity and water absorption, and lower strength compared with NA. The water absorption of RCA ranges 3–12% compared with 1–5% for NA (Gómez-Soberón, 2002, Katz, 2003). The density and absorption of RCA depend upon the W/C ratio of the original concrete (Etxeberria et al., 2007) and the amount of Performance enhancement of recycled concrete aggregate A
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Sustainability Special Issue : Recycling of Concrete Wastes
We invite scholars from around the world to submit to this Special Issue of Sustainability. Topics of interest include but are not limited to: (1) Management on the reclamation of construction and demolition waste; (2) Advanced recycling technologies for concrete watste; (3) Suatainable recycled materials including crushed recycled The results demonstrate that when combined with concrete recycling, Indeed, the carbonation treatment of recycled concrete aggregates has recently gained much attention due to its RCA performance enhancement and environmental benefits [129,130,131,132,133].CO2 Mineralization Methods in Cement and Concrete Industry
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Minerals Free Full-Text Design of Concrete Made with MDPI
RBW-containing concrete has a lower preparation cost than plain concrete, and the energy consumption and CO 2 emission of concrete preparation decrease with an RBW incorporation. The use of RBW in cement concrete products shows good recycling, economic and environmental benefits [ 8 ].Further treatments are necessary to entirely separate the hydrated cement paste from the sandy fraction, amongst which thermal treatment methods took the upper hand in recycling the fine fraction (Shui, Xuan, Wan, and Cao, 2008; Florea, Ning, and Brouwers, 2013; Florea, Ning, and Brouwers, 2014; Gastaldi et al., 2015).Innovative technologies for recycling End-of-Life concrete waste
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Chemical recycling and use of various types of concrete waste: A
Chemical recycling techniques for concrete that have been developed in recent years are attracting increasing attention. The theories of techniques for recycling and reusing concrete waste by using chemical methods tend to take advantage of the characteristics of concrete waste. Concrete contains ∼70% aggregates and ∼30% 2 天之前In a paper published in Construction and Building Materials, Alam showed that recycled concrete could be as durable and strong as fresh concrete, and sometimes stronger. After five years of weather and use, the recycled concrete has proven that it can perform as well as new concrete. Image: UBC. The recycling process for concrete is Rebuilding with Recycled Concrete ASME
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Waste Wash-Water Recycling in Ready Mix Concrete Plants MDPI
The management of waste wash-water (WWW) is one of the most significant environmental problems associated with ready-mix concrete production worldwide. The problems are exacerbated should it be disposed of in an inappropriate manner. This study evaluated the potential of WWW recycling in ready mix concrete Recycling water treatment sludge in concrete is an environmentally friendly and high-value utilization measure. However, little research has been done on the effect of manganese-rich drinking water sludge ash (DWSA) on concrete.Recycling hazardous water treatment sludge in cement
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Experts tout the benefits of recycled glass pozzolans
Citing Oregon Department of Environmental Quality research, Patrick Grasso, who helps run a New Rochelle, N.Y. company that recycles glass into pozzolan, emphasized the greenhouse gas (GHG) concrete, which helped promote the concrete recycling practice. An early study b y FHWA (2004) 298 surveyed 50STAs and found that 41(82%) of them allowed rec ycling concrete as aggregate, of 299An Overview of Concrete Recycling Legislation and
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Waste Wash-Water Recycling in Ready Mix Concrete Plants
recycling in ready mix concrete plants in Jordan. A representative waste wash-water sample (400 L) was collected from a basin in a ready-mix concrete company. A pilot plant on the lab scale was fabricated and installed. The treatment system consisted of a concrete washout reclaimer, wedgebed slurry settlingElectrochemical treatment is a process which can help chloride ions to migrate out of concrete by applying an electric field between the concrete surface and the steel bars (Marcotte et al., 1999). In this context, the electrochemical extraction (ECE) and the bidirectional electromigration (BIEM) are the main electrochemical treatment Recycling methodology of chloride-attacked concrete based on
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Applied Sciences Free Full-Text Experimental Evaluation of
In this paper, a new innovative technology for the treatment of returned concrete is proposed. This method is based on the application of physical–mechanical processes that allow to obtain new quality products: recycled aggregates, microfiltered water and cement sludge. Specifically, by means of a mechanical system equipped with buffer Talk to Andy Gardner about this perspective. Get in touch. In the built environment to date, it has been cheaper, quicker and easier to knock things down and start over. Though this comes at a considerable cost in CO2 emissions. We explore the potential to reuse concrete, and the benefits from saving co2, to greater stability.How recycling concrete could accelerate sustainable construction
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Novel separation process for obtaining recycled cement
Recycling concrete waste with the aim of producing recycled aggregate concrete has been extensively investigated and reviewed (Chen et al., The results showed that thermal treatment of waste materials at 500 °C improved the mechanical properties of mortars, increasing Strength Activity Index (SAI)Production and recycling. The chemical composition and physical characteristics of steel slag are closely related to the raw materials and production process for steelmaking. In order to increase the utilization rate of steel slag, it is necessary to improve the treatment methods and the recycling modes according to the quality of the Recycling of steel slag aggregate in portland cement concrete:
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Ways to Recycle and Reuse Concrete LiveAbout
How Concrete Is Recycled. Concrete is recycled by using industrial crushing equipment with jaws and large impactors. After the concrete is broken up, it is usually run through a secondary impactor and is then screened to remove dirt and particles and to separate the large and small aggregate. Additional processes and equipment,
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