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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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Kou et al. ( Kou and Poon, 2013) investigated the long-term properties (up to ten years) of the outdoor exposed RAC consisting recycled concrete aggregate and fly ash as partial replacement of aggregate and cement, respectively. Four replacement ratios of FA to cement in weight, i.e. 0%, 25%, 35% and 55% were considered.
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This study aims to arrive at models to correlate the mechanical properties of recycled aggregate concrete (RAC). An experiment was performed on the recycled coarse aggregate (RCA) ratio of 0%, 25%, 50%, and with 400kg/m3 of cement content, varying water-to-cement ratio (w/c) 0.3, 0.4, 0.48, and super plasticizer (SP) …
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This paper investigates the mechanical properties of concrete containing recycled aggregates and fly ash as a sustainable and eco-friendly solution for construction, which can reduce the demand for natural aggregates and cement, conserves natural resources, and curtails greenhouse gas emissions.Machine learning methodology can …
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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 …
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This study used the novel algorithms of machine learning (ML) to forecast the splitting tensile strength (STS) of concrete containing recycled aggregate (RA). ... to forecast the splitting tensile ...
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Interpretable machine learning model for evaluating mechanical properties of concrete made with recycled concrete aggregate ... this paper is to use the data-driven approach to predict and evaluate the mechanical properties of concrete made with recycled concrete aggregate (RCA), including compressive strength and elastic …
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These machines can reduce larger rocks to smaller rocks, gravel, or even dust! The concrete can be refined for rebar, wood, or other metal chunks before being added to these machines. There are several …
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Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon …
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Construction and demolition activities consume large amounts of natural resources, generating 4.5 bi tons of solid waste/year, called construction and demolition waste (C&DW) and other wastes, such as ceramic, polyethylene terephthalate (PET), glass, and slag. Furthermore, around 32 bi tons of natural aggregate (NA) are extracted …
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To tackle this shortcoming, incorporating SCMs into recycled aggregate concrete (RAC) has been extensively explored ... economical, and environmental objectives for sustainable recycled aggregate concrete based on machine learning and metaheuristic algorithms. J. Build. Eng., 63 (2023), Article 105570, …
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Recycled Concrete Aggregate A Sustainable Choice for Unbound Base. ACI Fall 2015 Convention Denver, Colorado November 8, 2015. Cecil L. Jones, PE Diversified …
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DOI: 10.2139/ssrn.4187666 Corpus ID: 251549368; Efficient Creep Prediction of Recycled Aggregate Concrete Via Machine Learning Algorithms @article{Feng2022EfficientCP, title={Efficient Creep Prediction of Recycled Aggregate Concrete Via Machine Learning Algorithms}, author={Jinpeng Feng and Haowei Zhang …
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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 algorithm and k-fold cross-validation were utilized to find the optimal hyperparameters. • The XGBoost, was shown to have a higher efficiency and accuracy for predicting RAC creep …
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The variations in mechanical properties of geopolymer concrete (GPC) prepared with treated recycled concrete aggregate (RCA) in conjunction with a modified two-stage mixing approach (M-TSMA (sp-ggbs)) have been studied in the present research.Since GPC is prepared using fly ash (FA) and ground granulated blast slag …
DetailsMixture 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 …
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This research has used 16 concrete mix designs containing 0.1, 0.3, and 0.5% steel fiber (SF), and 20, 30, 40, 50, and 60% copper slag (CS) to examine their fresh and hardened characteristics, and ...
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1. Introduction. The rapid growth of the concrete industry has caused several environmental issues, such as the depletion of natural aggregates, overload of landfills, and CO 2 emission released to the atmosphere [1], [2], [3].One latent solution to decreasing the environmental footprint of concrete production is the reuse of construction and …
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Recycled concrete aggregate, often abbreviated to RCA, is also known as "crushed concrete." This name sums up what RCA material is: crushed asphalt and concrete debris that has been screened, …
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A concrete mixture available in the literature (Poon et al., 2004) is chosen and natural fine aggregate, natural coarse aggregate and both natural fine and coarse aggregate are replaced with recycled fine aggregate, recycled coarse aggregate and recycled fine and coarse aggregate, respectively in a range of 0–90% with the step of …
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Many previous studies have successfully used recycled concrete aggregate (RCA) in the production of concrete and mortar [3], ... This study estimated the compressive strength of recycled concrete using six machine learning approaches, including GB, XGB, SVR, GB_PSO, XGB_PSO, and SVR_PSO. The input parameters …
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Recycled Concrete Aggregate (RCA) To align with Singapore's vision in construction sustainability, Eastern Continent also recycle concrete debris from demolishing works and convert them into useable products as Recycled Concrete Aggregate (RCA). The primary process will be using excavator and jaw crusher to break up the concrete hardcore. The ...
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In recent years, machine learning algorithms have been increasingly used to predict the performance of concrete with both natural aggregates [46,47] and with recycled aggregates [4].
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Recycled aggregate concrete (RAC) is a form of concrete made from recycled resources. ... Mixture optimization of mechanical, economical, and environmental objectives for sustainable recycled aggregate concrete based on machine learning and metaheuristic algorithms. J. Build. Eng., 63 (Jan. 2023), 10.1016/j.jobe.2022.105570.
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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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Fig. 10 shows concrete containing natural coarse aggregate and recycled brick coarse aggregate (Liu et al., 2021). Hence, the RCA's physical, chemical, and mechanical characteristics must be investigated before use (Mills-Beale and You, 2010). As previously discussed, it is important to note that these properties would differ from the …
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Recycled concrete aggregate is aggregate made from used concrete from demolition sites. The quantity of old concrete from a demolition site depends on the type of building. For example, the list below shows the …
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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 ).
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This paper comprehensively investigated the surrogate model of recycled aggregate concrete (RAC) creep behavior prediction for the first time utilizing five typical machine learning (ML) algorithms trained with the RAC_Creep_v1 database. ... Innovative modeling framework of chloride resistance of recycled aggregate concrete using …
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RUBBLE MASTER's mobile impact crushers can be configured to meet any spec so you can tackle more jobs with a single machine. Meet Your Spec. High-quality recycled concrete aggregates with excellent gradation for dense-graded aggregate (DGA) base and sub-base materials.
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Construction aggregate includes a range of particulate materials - ranging from coarse to medium grains - including sand, gravel, slag, crushed stones, and recycled concrete. These materials are …
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Recycled concrete and masonry (RCM) aggregate can be described as graded aggregate produced from sorted and clean waste concrete and masonry. The RCM material may contain brick, gravel crush rock or other forms of stony materials as blended materials. Class 1B-RCA as per HB 155 (2002) is an RCM aggregate.
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1. Introduction. Due to the recent growth of infrastructure development worldwide, the amount of concrete is increasing with an estimated average annual of 17.5 billion tons [1].In a concrete mixture, the aggregate content accounts for 70–85 % of the weight, acting as a bearing skeleton [2].Therefore, to create this huge volume of …
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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 …
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Construction and demolition waste, including recycled concrete aggregate and recycled glass, can be incorporated into civil engineering applications to address environmental concerns and promote sustainable development. ... crush these stones to the required particles size using an electric crushing machine in the concrete laboratory (Fig. 2 ...
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The recycled aggregate is used as soon as it is processed. Recycled concrete currently supplies about 5% of aggregate use. The bulk of recycled aggregates – about 68 % – is used as road base. The remainder is used for new concrete mixes (6%), asphalt (9 %) and fill. Recycling concrete features both cost savings and environmental benefits:
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Recycling of concrete is a relatively simple process. 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 …
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The recycled aggregate is an alternative with great potential to replace the conventional concrete alongside with other benefits such as minimising the usage of natural resources in exploitation to produce new conventional concrete. Eventually, this will lead to reducing the construction waste, carbon footprints and energy consumption. This paper aims to study …
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Coarse recycled concrete aggregate replacement ratio, aggregate to cement ratio, bulk density of recycled concrete aggregate, water absorption of coarse recycled concrete aggregate, water-to-cement ratio ... Prediction of elastic modulus of normal and high strength concrete by support vector machine. Constr. Build. Mater., 24 …
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Recycled Concrete Aggregate Cost. Recycled Concrete Aggregate CostnRecycled concrete aggregate disadvantages include the cost, which in the USA is around $15 to $ 55 per ton, around $18 to $80 per cubic yard, and $2 to $5 per cubic foot, with price, depends on the quality and quantity of recycled aggregate. Stabilized …
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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 …
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PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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