Mixture Optimization of Recycled Aggregate Concrete Using Hybrid …
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 …
Compressive strength of concrete with recycled aggregate; a …
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 …
Choosing a mobile impact crusher for recycling – what you need …
High demand for a small, mobile crusher "The growth in recycling of concrete and asphalt recycling industries has led to higher demand for smaller, more mobile crushers," says John O'Neill, International's VP of sales. "Over the last 10 years we have improved our control panel systems to provide operators with more …
Mixture optimization of mechanical, economical, and …
Using CDW to prepare recycled aggregate (RA) instead of natural sand and gravel to produce recycled aggregate concrete (RAC) can reduce the drain of natural resources and lower the negative effects of the landfill. ... (AI) algorithms received growing attention in the modeling of mechanical performance for concrete [10]. Machine learning …
Durability of Recycled Concrete Aggregates Prepared with
Abstract. Recycled concrete aggregates (RCAs) have low quality when compared with natural or conventional aggregates as the paste adhering to it is the key aspect that affects its functionality. Since the adhering cementitious paste weakens the adhesion between the aggregate and the binder, it becomes a decisive factor in the …
RACBase: A cloud-based database of recycled aggregate concrete
Abstract. This paper presents the first universal cloud-based database of recycled aggregate concrete (RAC) durability, named RACBase. The database collects experimental data on the durability of RAC from published literature all over the globe. Each set of data consists of the literature source, materials information, and the unified test result.
Infrastructures | Free Full-Text | Recycled Aggregates Concrete …
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 …
AI-Assisted optimisation of green concrete mixes incorporating recycled
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, …
Experimental investigation and comparative machine-learning
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, …
An Experimental Study on Strengthening Recycled Aggregates
The strengthening of recycled aggregates is a critical issue, as the low strength of recycled aggregates is the main reason that limits their widespread use. The slurry coating method can strengthen the recycled aggregates by repairing the aggregate surface, but it is hard to improve the internal strength due to the existence of pores and …
Crystals | Free Full-Text | Use of Recycled Concrete Aggregates …
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 …
Recycled Aggregates
Recycled Aggregates Construction materials are increasingly judged by their ecological characteristics. Concrete recycling gains importance because it protects natural resources and eliminates the need for …
Evaluating compressive strength of concrete made with recycled concrete
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 …
Mechanical Performance of Concrete Made with Recycled
The majority of research conducted on recycled aggregate concrete focuses on using recycled coarse aggregates as a granular material [13–15] and as cement stabilised materials in base and subbase layers [16–18]. In contrast, there are few studies on the replacement of coarse and fine aggregate at the same time to prepare recycled …
Mechanical and Hydraulic Properties of Recycled Concrete …
In this study, a series of compaction, California bearing ratio, saturated hydraulic conductivity, and particle breakage tests of well– and poor–graded mixtures of recycled clay brick aggregates (RCBs) and recycled concrete aggregates (RCAs) with maximum aggregate diameters of 19, 25, and 37.5 mm were carried out to examine the …
Efficient creep prediction of recycled aggregate concrete via …
This study proposed the surrogate model to predict recycled aggregate concrete (RAC) creep behavior utilizing machine learning (ML). Both grid search …
Sustainability | Free Full-Text | A Comprehensive Review on Recycling
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 …
Recycled Aggregates | SpringerLink
It is the prerequisite for recycling waste concrete that the technique of reclaiming, crushing, and manufacturing recycled aggregate (RA). Based on the existing abroad and domestic techniques of crushing waste concrete and recycled aggregate modification [], considering the condition of engineering in China, techniques of RA …
Concrete Recycling: A Concrete Plan to Save
Recycling concrete costs around $4 -$10 per ton. Disposing of concrete can cost as much as $22-45 per ton! Your own peronal scenario will be different as there will be different fees and costs depending on the machines you have and the state that you live in. For more information on how much money you could save - contact a Machinery Partner ...
Comparative LCA of concrete with recycled aggregates: a circular
Purpose Construction and demolition waste (C&DW) is the largest waste stream in the European Union (EU) and all over the world. Proper management of C&DW and recycled materials—including the correct handling of hazardous waste—can have major benefits in terms of sustainability and the quality of life. The Waste Framework …
Effect of Crushing Method on the Properties of Produced Recycled …
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 …
Performance enhancement of recycled concrete aggregate – A …
Because the original cement mortar attached on NA is more porous than NA. 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 …
Split Tensile Strength Prediction of Recycled Aggregate-Based
This study aimed to illustrate how the soft-computing algorithms from machine learning can be utilized to predict the strength (STS) of recycled aggregate concrete. The DT, ANN, and RF methods were applied to anticipate the STS of the RA-based concrete. The following inferences were drawn:
Split Tensile Strength Prediction of Recycled Aggregate-Based
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 for concrete materials. Using advanced artificial intelligence (AI) approaches, this study anticipates the split tensile strength (STS) of …
Machine learning prediction of carbonation depth in recycled aggregate
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 …
(PDF) Concrete using recycled aggregates
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).
Materials | Free Full-Text | Perspective on the …
The constantly expanding civilization and construction industry pose new challenges for a sustainable development economy. Aiming to protect the environment is often associated with waste …
Recycled Aggregate Concrete (RAC)
The use of recycled aggregate concrete in this time of modern civilization opens a whole new range of possibilities. Recycling of Concrete Debris Source- YouTube. The requirement for coarse recycled concrete aggregate (RCA) and coarse RA is specified in BS 8500-2: 2002 which is given the image below.
An Overview of Existing Application of Recycled Concrete in …
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 ).
Recycling of Macro-Synthetic Fiber-Reinforced Concrete and
The study aims to investigate the feasibility of using recycled aggregate (RA) and recovered fibers (RFs) obtained from recycling polypropylene fiber-reinforced concrete (PPFRC) in new concrete production. The mechanical properties were compared between a parent PPFRC, polypropylene fiber-reinforced recycled aggregate concrete …