Download Citation | On Feb 1, 2024, Emadaldin Mohammadi Golafshani and others published Sustainable mix design of recycled aggregate concrete using artificial intelligence | Find, read and cite ...
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Recycled aggregate concrete (RAC) enhanced with supplementary cementitious materials (SCMs) presents a sustainable alternative in the construction industry. This study …
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Recycled aggregate concrete: Particle Packing Method (PPM) of mix design approach. Author links open overlay panel Subhasis Pradhan a, Shailendra Kumar b, Sudhirkumar V. Barai a. ... [83] showed that for a concrete mix design, it is always desirable to obtain minimum voids by packing the aggregates as densely as possible. This reduces the ...
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Recycled aggregate pervious concrete are made by cement, water and recycled aggregates, which conforms to the concept of sustainable development, can be used to construction of the sponge city ...
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natural aggregate (granite) or recycled concrete aggregate, as shown in Fig. 1. The specific gravity of the natural aggregate was 2.65 and that for recycled concrete aggregate was 2.19 and 2.04 for 20 and 13 mm maximum size recycled concrete aggregate, respectively. The water absorption for 20 and 13 mm recycled concrete aggregates was 5.3 and ...
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The decrease in the quality of recycled aggregate due to an increase in the number of recycling is a primary factor that limits the multi-recycling of concrete. This degradation adversely affects concrete …
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The concrete mix design process considers key performance parameters such as compressive strength, chloride ion penetration resistance, and carbonation resistance. ... However, the porous nature and higher water adsorption of recycled aggregate pose challenges in recycled aggregate concrete (RAC) including a reduction in workability, increased ...
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Concrete waste (CW) recycling stands as a promising strategy to promote sustainable construction practices. This research aims to assess the feasibility of using recycled concrete aggregates (RCA) as a surrogate for natural aggregates (NA) in concrete applications and reduce the environmental impact associated with the depletion of natural resources and …
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10262 (2009) Concrete Mix Proportioning-Guidelines, for Mix Design M-40 Grade concrete. A total of five aggregates mixtures of 0 (NA), 30, 50 70 and are tested, and the test results are shown in
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Resource utilization of construction and demolition (C&D) waste has great potential to significantly reduce the consumption of natural resources and improve the environment. Meanwhile, establishing a sound policy system and reducing production are the key ways to solve the problem of C&D waste. Numerous studies on C&D waste, recycled concrete …
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This paper discusses the effects of recycled concrete aggregates (RCA) on compressive strength and permeability of recycled aggregate concrete (RAC) by using recycled concrete...
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The same problem is encountered in this study, since there is no mix design for recycled aggregate concrete where its performance is predictable, and the final results of compressive strength are consistent. A unit compressive strength in a unit volume concrete helps to normalize and precisely reflect the performance of concrete mixes on the ...
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Sustainable mix design of recycled aggregate concrete using artificial intelligence. Emadaldin Mohammadi Golafshani Taehwan Kim A. Behnood Tuan Ngo Alireza Kashani. Engineering, Environmental Science. Journal of Cleaner Production. 2024; 16. Save. Strength-based life cycle CO2 of fly ash concrete: Variation with common mix parameters.
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Sustainable mix design and carbon emission analysis of recycled aggregate concrete based on machine learning and big data methods. Author links open overlay panel Boqun Zhang a, Lei Pan a, Xinlei Chang a, ... One key research area in the field of RAC is the design of concrete mix proportions. Currently, this design work is mostly dependent on ...
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This paper demonstrates that RSM can be used to design the mix proportion of recycled aggregate pervious concrete. From the perspective of the internal structure of recycled permeable concrete, the factors affecting its strength and porosity are the paste properties, the coating thickness of paste on the surface of aggregate and the void content of aggregate.
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Download scientific diagram | Mix design of recycled aggregate concrete from publication: Effect of Recycled Concrete Aggregates on Compressive Strength and Water Permeability of Concrete | This ...
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Therefore, there is a need to develop sustainable concrete which either directly or indirectly reduces CO 2 emissions. One way to achieve this is by limiting the consumption of cement to the maximum extent, by partially replacing it with supplementary cementitious materials (SCMs), which are majorly industrial by-products and by optimizing the mix designs [21], [22], …
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The actual porosity of RCAs depends on two variables: the composition of the original concrete and the processing procedure adopted for transforming concrete debris into recycled concrete aggregates [26].The presence of a constituent characterised by a higher porosity has a twofold influence on the strength of RAC.
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Our review indicates that a simple mix proportion design method for HSRAC with optimal performance, considering mechanical properties, workability, environmental impact, …
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This paper puts forward a strength-based mix design method for recycled aggregate concrete using a modified empirical formula. A total of 30 mixes, the amount of cement varies from 300 kg/m³ to ...
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This paper puts forward a strength-based mix design method for recycled aggregate concrete using a modified empirical formula. A total of 30 mixes, the amount of cement varies from 300 kg/m 3 to 500 kg/m 3 and the proportion of recycled coarse aggregate ranges from 0% to , were prepared for the regression analysis of relationships between multiple …
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Compressive and splitting tensile strength tests on recycled concrete with CRCA ( substituting limestone aggregate) made from two mixed SC with varying strengths, have been …
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Several desirable characteristics of concrete, such as strength, slump, durability and low CO2 emission, cannot always be obtained by current conventional mix proportion design methods for recycled aggregate concrete (RAC), because Recycled aggregate generally has lower quality than natural aggregate owing to residual cement paste and various impurities. We treat …
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In this paper, the authors have identified the most suitable method of mix design for RAC, from amongst the available conventional methods of mix design. An influencing …
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The unit price of the prepared CRFA concrete was around 12.7% lower than that of the natural aggregate concrete. Additionally, the proposed procedure for the concrete mixture design could recycle all concrete waste into the new concrete and replace all the natural fine aggregate in the concrete mixture.
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Keywords: concrete waste, completely recycled fine aggregate, concrete mix design, modified packing density method. 1. Introduction. With plenty of urbanization happening over the world, the construction industry gradually becomes the major consumer of the natural resources in the world. Thus, many developing countries face a shortage of ...
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2. The Simple Mix Design Method of Recycled Aggregate Concrete. The simple mix design method, including the orthogonal test method and the single-factor test method, were combined to determine the mix proportion of RAC in this section. The former was firstly applied to find the main factors.
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The replacement levels of recycled aggregate were 25% and 50%, and equivalent mortar volume mix design was applied for recycled aggregate concrete. The results show that the mechanical strength of recycled aggregate concrete increases with increasing original aggregate size. This effect was observed to be greater in concrete using recycled ...
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This study investigated the mix proportion design of recycled aggregate concrete (RAC) containing multi-source recycled aggregate (RA) based on machine learning and optimization algorithms. Firstly, four machine learning models were utilized to predict the cubic compressive strength of RAC, and an objective function model for carbon emissions ...
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Reasonable mix ratio design of recycled aggregate concrete (RAC) helps to promote its popularization and application in engineering structures. In this paper, a data-driven approach combined with a multi-objective optimization search algorithm for the design of RAC proportion is proposed to address the shortcomings of traditional design methods ...
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Due to the finite sources of natural aggregates, recycled concrete aggregates can be used as a suitable and economic material for the production of recycled concrete. Use of the recycled aggregates in concrete may undermine some mechanical properties of concrete. The aim of this study is to determine an optimum mix design made with the recycled ...
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The improved mechanical properties of recycled aggregate concrete (RAC) by employing the particle packing method (PPM) of the mix design approach encourages its application to study the ...
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Although numerous studies have been conducted on mix design of recycled brick aggregate concrete, however, the design procedure of the currently proposed RBAC mix design method is still complicated. Therefore, this paper collected 182 sets of test data as a database [40,[72], [73], [74]] and utilized ML model to predict the compressive strength ...
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The study aims to propose a mix design method for self-compacting recycled aggregate concrete (SCRAC) containing FA and BFS based on paste rheological threshold theory and material packing characteristics. ... Concrete mix design based on water film thickness and paste film thickness. Cem. Concr. Compos., 39 (2013), pp. 33-42. View PDF View ...
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For the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled …
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Typical pervious concrete mix consists of 180–355 kg/m 3 of binder material, 1420–1600 kg/m 3 of coarse aggregate and water to cement ratio ranged from 0.27 to 0.43.
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