This debris is then picked up and dumped into the top of the concrete recycling machine, from which it falls into a crushing impactor, which as the name suggests, crushes the concrete into small pieces known as recycled concrete aggregate (RCA). Depending on the size of RCA that the concrete recycler is looking to create, the …Web
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This study intends to develop a sustainable strategy for selection of recycled aggregate concrete (RAC) through a series of experiments and using multi-criteria decision-making (MCDM) techniques. The mechanical, environmental and economic aspects of RAC were integrated to evaluate the most sustainable concrete, which may …Web
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Currently, one method of recycling waste concrete is to crush, clean, and grade waste concrete to obtain recycled aggregate particles. The particles with a size less than 4.75 mm after crushing ...Web
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Mixture optimization of mechanical, economical, and environmental objectives for sustainable recycled aggregate concrete based on machine learning and metaheuristic algorithms. Author links open overlay panel Kaihua Liu a, Jiakai Zheng a, Shuxiong Dong a, Weili Xie a, ... Recycled aggregate concrete (RAC) has received …Web
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This paper presents the mechanical behaviour of concrete mixes made with recycled aggregate by replacing the natural aggregate with crushed concrete from pavement demolition. The purpose of this study was to determine the feasibility of using recycled aggregate from pavement demolition to make new concrete for pavement …Web
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The use of recycled aggregate concrete can save natural resources and reduce environmental pollution, which has been widely concerned in recent years. ... it is found that [32] RCCA is affected by the strength of the original concrete, crushing machine, and crushing degree, and the quality and content of old mortar of recycled aggregate …Web
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The adoption of recycled-aggregate concrete has gained traction in response to increasing environmental concerns, meeting the demands of the construction industry. ... Evaluating …Web
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Sustainable concrete is gaining in popularity as a result of research into waste materials, such as recycled aggregate (RA). This strategy not only protects the environment, but also meets the demand …Web
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DNN was used to predict the compressive strength in recycled concrete [20,36,56,[63][64] [65] [66][67]; the input parameters were water-cement ratio, recycled coarse aggregate replacement ratio ...Web
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Once the recycled concrete has been sourced, it can be processed. This starts with crushing. RCA is first crushed using industrial equipment. This step in the process breaks up the original structure, reducing it from larger slabs into a granulated material. After the concrete is crushed, it's then run through another impactor.Web
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Recycled aggregate concrete without fly ash and GGBS began to lose mass after 25 freeze and thaw cycles. However, the independent or simultaneous replacement of fly ash and GGBS in 50% replaced recycled aggregate concrete delayed the mass loss rate only after 150 freeze and thaw cycles . Similar research on durability …Web
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From the perspective of sustainable development, recycling waste concrete to produce recycled concrete aggregate (RCA) can effectively reduce harm to the environment [2,3]. ... Then RCA was ground by a machine. The combination of heating and grinding treatment improved the apparent density of RCA by 4.67% at 600 °C. However, …Web
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The recycled aggregate concrete has a compressive strength of at least 76% and modulus of elasticity from 60% to. Problem statement. ... based on machine learning. A database containing 176 circular and 126 rectangular RACFST samples was employed to assess the applicability of existing specification, and was then used to train …Web
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It involves breaking, removing, and crushing existing concrete into a material with a specified size and quality. See ACI 555 (2001) for more information on processing old concrete into recycled concrete …Web
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This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and …Web
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There is a growing need to find ways to reuse fine concrete waste from the construction industry. In this study, recycled concrete fines were granulated and used as lightweight aggregates. Ladle slag, a steel industry residue, was used as a co-binder in different ratios (0, 10, 20, and 30%). The materials were blended and granulated, and …Web
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19.2.1 Recycled concrete aggregate (RCA) Coarse RCA complies to the requirements of maximum 5% masonry content, 5% fine materials, 0.5% lightweight material, 5% asphalt, 1% foreign material and 1% acid soluble sulfate, and is suitable for use in concrete as per BS 8500-2 (2006). In designated concrete RC20/25 to RC40/50, RCA can automatically ...Web
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Mobile Concrete Crushers: 90-385 TPH | RUBBLE MASTER Dominate the Jobsite With a RUBBLE MASTER Concrete Crusher Mobile concrete crushers for processing …Web
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Recycled aggregate concrete (RAC) has become a popular building material due to its eco-friendly features, but the difficulty in predicting the crack resistance of RAC is increasingly impeding its ...Web
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Using recycled aggregate in concrete is one of the best ways to reduce construction pollution and prevent the exploitation of natural resources to provide the needed aggregate. However, recycled aggregates affect the mechanical properties of concrete, but the existing information on the subject is less than what the industry needs. Compressive …Web
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Recycled concrete aggregate machines like protable and mobile crushers can help to get coarse aggregate while ball mill or powder grinding mill can …Web
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In this study, the idea of recycling the concrete wastes and reuse of them for reproduction of green concrete has been presented. Thus, we have tried to study mechanical parameters using recycled aggregate concrete. For this purpose, three mix designs including natural, recycled and recycled fiber concrete were tested. Moreover, …Web
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The input parameters used for modeling are cement content, water content, aggregate content, natural aggregate content, recycle concrete aggregate content, sand content, water absorption of natural aggregate and RCA. The result indicates that the performance of hybrid models of GB_PSO, XGB_PSO, and SVR_PSO has higher …Web
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The adoption of recycled-aggregate concrete has gained traction in response to increasing environmental concerns, meeting the demands of the construction industry. ... Modeling the mechanical properties of recycled aggregate concrete using hybrid machine learning algorithms. Resour Conserv Recycl, vol. 190 (2023), 10.1016/j.resconrec.2022.106812.Web
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Geopolymer concrete (GC) has the potential to incorporate recycled concrete aggregates (RCA) obtained from construction and demolition waste. This research aims to review the current state-of-the-art knowledge of the RCA in GC and identify the existing knowledge gaps for future research direction. This paper highlights the essential …Web
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The application of waste materials in concrete is gaining more popularity for sustainable development. The adaptation of this approach not only reduces the environmental risks but also fulfills the requirement of concrete material. This study used the novel algorithms of machine learning (ML) to forecast the splitting tensile strength …Web
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Mixture optimization of recycled aggregate concrete using hybrid machine learning model. Materials, 13 (2020), p. 4331, 10.3390 ... [20] F. Khademi, S.M. Jamal, N. Deshpande, S. Londhe. Predicting strength of recycled aggregate concrete using artificial neural network, adaptive neuro-fuzzy inference system and multiple linear regression. Int …Web
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The use of alternative materials and recycling in construction has gained popularity in recent years as part of the industry’s commitment to sustainability. One such material, recycled aggregates, has been extensively studied over the past two decades for its potential to replace natural aggregates in cement-based composites. …Web
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This study proposed the surrogate model to predict recycled aggregate concrete (RAC) creep behavior utilizing machine learning (ML). Both grid search …Web
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5 kinds of concrete recycling machines These 5 kinds of concrete recycling machines are mostly used and most popular equipment. The followings are the reasons why you can choose them …Web
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1. Introduction China's total output of commercial concrete was 3.06 billion cubic meters, an increase of 5.53% compared with the previous year in 2021 [1]. …Web
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PSTSMA method improve up to 6.35% the strength of recycled aggregate concrete made up of recycled aggregate at 28 days respectively w.r.t. Normal Mixing Approach(NMA).Web
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Natural aggregate (NA) can be replaced by recycled concrete aggregate (RCA) in the construction industry, which can solve the problem of construction waste disposal and reduce the gap between demand and supply. ... Machine learning (ML) models considering the influence of multicollinearity can realize the multi objective optimization of ...Web
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Construction and Demolition Waste (C&DW) is generated around the world and its quantity will increase in the future. Recycling has become the favored method of dealing with concrete waste but, to avoid its downcycling, it is important to develop a recycling process which is able to produce high-grade recycled concrete aggregates …Web
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DOI: 10.1016/j.resconrec.2022.106812 Corpus ID: 254584372; Modeling the mechanical properties of recycled aggregate concrete using hybrid machine learning algorithms @article{Peng2023ModelingTM, title={Modeling the mechanical properties of recycled aggregate concrete using hybrid machine learning algorithms}, …Web
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Recycled aggregate concrete (RAC) contributes to mitigating the depletion of natural aggregates, alleviating the carbon footprint of concrete construction, and averting the landfilling of colossal amounts of construction and demolition waste. However, complexities in the mixture optimization of RAC due to the variability of recycled …Web
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Cost to produce recycled concrete aggregate range from £5 to £12 per tonne. The cost depends on the quantity, the quality of demolished concrete, and the size and type of …Web
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March 14, 2023. 1. 9033. Crushing and Screening Equipment for Concrete Recycling. There are two approaches to recycling concrete. One approach is to haul the concrete debris to a permanent recycling facility or quarry for crushing and screening. The alternative is to crush and screen the material at the demolition site.Web
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Figure 1. Waste concrete for recycling: concrete cubes and precast column. Figure 2. Recycled material after (a) primary and (b) secondary crushing. Crushed concrete particles were separated into standard fractions of coarse aggregate (4–8 mm, 8–16 mm and 16–31.5 mm), as seen in Figure 3. Figure 3.Web
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