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Application of artificial bee colony programming techniques for predicting the compressive strength of recycled aggregate concrete. ... Recycled aggregate concrete is a type of environmentally-friendly concrete in which natural aggregates are substituted by recycled aggregates. Compressive strength is considered as one of the most important ...
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The main purpose of this study is to determine the potentials of recycled aggregate concrete (concrete made with recycled concrete aggregate) for structural applications and to compare the ...
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In this context, this paper provides a thorough literature review on the current situation and challenges in the application of …
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1 Introduction. After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By …
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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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The effect can be attributable to the porous nature of the recycled aggregate, and hence, the premix process can fill up some pores and cracks, resulting in a denser concrete, an improved ...
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However, due to the higher porosity and water absorption of the recycled concrete aggregate (RCA) (Behnood et al., 2015c, Hanif et al., 2017, Pedro et al., 2017), it has different mechanical properties than the natural aggregate (NA), which should be taken into account in designing structures made with recycled aggregate concrete (RAC).
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Application of the recycled aggregate is a promising technology for resource saving and low environmental impacts, which is more effectively performed when recycled fine aggregate is used in addition to recycled coarse aggregate. Use of the recycled fine aggregate for the upper structures, however, shows minor progress …
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Application of optimization-based regression analysis for evaluation of frost durability of recycled aggregate concrete. Mahzad Esmaeili-Falak, ... To improve recycled aggregate concrete (RAC) technologies in permafrost, it is essential to certify the stability in frost-induced conditions.
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Application of the recycled aggregate is a promising technology for resource saving and low environmental impacts, which is more effectively performed when recycled fine aggregate is used in ...
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RCA has been used successfully and has been specified in paving concrete pavement applications in over 40 states across the U.S. and has been regularly used since the 1970s (Darter et al. 1998). The practice of recycling existing concrete pavements into new paving applications is supported by the Federal Highway
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The type of recycled aggregate that can be used depends on the application for which it is intended. For example; You can't use the same type of recycled aggregate in road construction as you would when creating a new sports ground. Thankfully, there are many types of recycled aggregate available to meet your construction needs. 6F2
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Industrial and construction solid waste regarded as a hazardous material has given rise to the potential threats of environmental pollution. The ferronickel slag (FNS) as an industrial by-product and recycled concrete aggregates (RCAs) derived from construction and demolition wastes have potential for sustainable use as the fine and …
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It discusses the research perspectives of recycled aggregate, namely the development of "green" processing methods for recycled aggregate and additional guidance on building a database to predict the strength of recycled aggregate. ... Application of domestic & industrial waste materials in concrete: A review. Materials …
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This study proposes the hybrid machine learning model combining random forest and Taguchi optimization (RF-TGC) to predict the shear strength of recycled reinforced concrete beams (RARC). For this objective, a total of 128 experimental results of shear strength of RARC beams from published papers were used to develop the …
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DOI: 10.1016/J.CONBUILDMAT.2013.12.096 Corpus ID: 136588438; Building application of recycled aggregate concrete for upper-ground structural elements @article{Yoda2014BuildingAO, title={Building application of recycled aggregate concrete for upper-ground structural elements}, author={Kazuhisa Yoda and Akira Shintani}, …
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A Review of Recycled Aggregate in Concrete Applications (2000–2017). Construction and Building Materials, Vol. 172, 2018, pp. 272–292. Crossref. Google Scholar. 10. Slattery K. Global Developments in the Aggregate Industry – Global Aggregates Information, Network. 2014.
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Recycled Aggregate Concrete . Recycled Aggregate Concrete (RAC) is basically concrete mix that is prepared from crushed aggregates and concrete which has already been used in construction works.In the sector of construction engineering the key role of an engineer is to provide adequate quality products with the available materials.
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The use of recycled concrete aggregate (RCA) as a replacement for natural aggregate in concrete mixtures provides a wide variety of benefits such as reduced cost and pollution, reduced CO 2 footprint, and reduced pressure on natural resources. Due to the inferior properties of the RCA compared to the natural one, the mechanical …
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To dispose of CDW and slow down the depletion of natural resources, the use of recycled aggregates (RA) prepared from CDW as a substitute for natural …
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For around 70 years, research has showed that using recycled aggregates (RAs) from CDW to replace natural aggregates (NAs) in new concrete application as …
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Surface image of natural and recycled concrete aggregates (a, c, e: Recycled concrete aggregate; b, d, f: Natural aggregate) (64-66). Figures - uploaded by Ali Mardani Author content
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Request PDF | Application of recycled coarse aggregate by mixture to concrete construction | With regard to the technology for producing aggregate of recycled concrete from concrete blocks, a ...
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This article presents a comprehensive review on the use of recycled concrete aggregate (RCA) and recycled aggregate concrete (RAC) in construction, …
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Recycled aggregate concrete (RAC) is a new type of concrete produced using crushed, screened, and washed recycled aggregate obtained from waste concrete to replace natural aggregate (NA) partially or completely [1]. ... Therefore, it will facilitate the applications of recycled concrete aggregate if the adhered cement mortar can be …
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Furthermore, around 32 bi tons of natural aggregate (NA) are extracted annually. In this scenario, replacing NA with recycled aggregate (RA) from C&DW and …
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RCAs used in this study were derived from Qingdao Green Sail Recycled Building Materials Cd., Ltd., Shandong province, P.R. China. Table 3 exhibits the physical properties of fine and coarse aggregate used in this study. Regarding the physical properties of fine aggregate including moisture content, apparent density and water …
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The main aim of this study is to review the literature on the production and utilisation of recycled aggregate in concrete, concrete pavements, roadway construction, and other civil engineering works and some discussion on the savings on CO 2 …
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Figure 1 Recycling concrete as aggregate. Figure 2 Base Aggregate. Figure 3 PCC aggregate. Figure 4 HMA aggregate. Figure 5 Miscellaneous aggregate. Some conclusions that can be drawn from the figures are as follows: Concrete is routinely being recycled into the highway environment in the United States. The principal application …
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In the current century, urbanization and the development of the construction industry have led to the generation of construction and demolition waste (CDW), imposing pressure on ecology and the environment. This has attracted the attention of industry personnel and researchers. This work discusses the current research on recycled …
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