A Novel Mix Design Method for Mixed Recycled Coarse Aggregate Concrete
AbstractRecycled aggregates extracted from the construction and demolition waste of brick and concrete building are mixed recycled aggregates (MRA), which comprise concrete recycled aggregate (CRA) and brick recycled aggregate (BRA). The components of ...
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Autogenous shrinkage and drying shrinkage of recycled aggregate
Recycled concrete aggregate (RCA) is produced by treating and crushing the abandoned concrete members. The RCA usually consists of original aggregate (OVA), adhered mortar, and interfacial transition zone (ITZ) between adhered mortar and OVA, which is results in the significant difference between recycled aggregate concrete (RAC) and natural …
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A mix design method for self-compacting recycled aggregate concrete
Considerable research has been conducted on the recycling of waste concrete. There are two main techniques. First, the waste concrete is broken into demolished concrete lumps with a characteristic size of 60–300 mm to partially replace fresh concrete to form recycled lump concrete [13], [14], [15].Alternatively, waste concrete can be crushed into recycled …
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Shear Friction in Single-Generation and Multigeneration Recycled …
In this paper, 72 shear friction tests are undertaken on multigeneration recycled aggregate concrete that successively crushes and reuses concrete to make three generations of aggregate. The results of these tests are brought together with 314 existing shear friction test results on and recycled aggregate concrete to develop a new ...
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Multi-objective optimization design of recycled aggregate concrete
It is a good way to use recycled aggregate produced by waste concrete to replace natural aggregate to prepare Recycled Aggregate Concrete (RAC), which improves the recycling rate of CDW and reduces the pressure of over-exploitation of natural resources. Research on RAC production plays a pivotal role in Chinese sustainable development strategy.
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Design Strategy for Recycled Aggregate …
Currently, a number of disadvantages hampers the use of recycled concrete aggregates (RCA). The current review proves that concretes made with complete replacement of natural aggregate with RCA allow the production of …
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Concrete Mix Design of Recycled Concrete Aggregate (RCA): …
T1 - Concrete Mix Design of Recycled Concrete Aggregate (RCA) T2 - Analysis of Review Papers, Characteristics, Research Trends, and Underexplored Topics. AU - …
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Experimental analysis of properties of recycled coarse aggregate …
The heterogeneity influences the characteristics of RA and these aggregate properties have a negative influence on recycled aggregate concrete (RAC) quality such as reduction of the compressive strength, tensile strength due to the increased concrete porosity and a weak aggregate–matrix interfacial bond [9], [10], [11].
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Bond of Reinforcement in Concrete Incorporating Recycled Concrete
The authors would like to thank Steed and Evans Construction, the Greater Toronto Airports Authority, Dufferin Aggregates, Lafarge, and St. Mary's Cement for their donations of materials for use on this project; the University of Waterloo and the Center for Pavement and Transportation Technology (CPATT) for the use of their laboratory facilities; …
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Strengths of Recycled Aggregate Concrete Made Using …
The properties of the aggregate were also compared. The fine aggregate for recycled and conventional concrete was 100 percent natural sand. Two sources of recycled aggregate (crushed concrete pavements from U.S. 23 and 1-75 projects in Michigan) and one source of natural aggregate (crushed limestone) were used.
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Sustainable concrete production: The potential of utilizing recycled …
Research into the properties of recycled aggregates (RAs) has been the focus for over 40 years [4], but due to undesirable results, such as high-water absorption and poor workability of concrete the industry was discouraged from counting on RA as an alternative.The investigations were largely limited to the manufacturing of non-structural grade recycled …
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Enhancement strategies for recycled brick aggregate concrete …
The employment of recycled brick aggregate (RBA) can be traced back to last century [[10], [11], [12]].However, the reduction of the concrete strength was extensively recognized by the researchers when the natural aggregate was replaced by RBA [[13], [14], [15]].This is mainly due to the relatively higher porosity of RBA than that of natural aggregate, …
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Effects of the recycled coarse aggregate mixing ratio on the
Experimental plan. In this study, design strengths of 21, 24, and 27 MPa were considered. The quality of recycled aggregate concrete is managed by KCS 14 20 21 recycled aggregate concrete standards of the Korean Architectural Standard Specification [], and KCS 14 20 10 general concrete specifications are applied [].Based on the specifications, a target …
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Structural Concrete from Recycled Aggregates
In spite of the amount of construction debris produced every year, recycled aggregates are still not commonly used in the concrete industry. A recycled aggregate concrete—RAC—is not yet allowed by technical codes even though it would greatly help reduce the disposal of debris. This paper considers a construction site that can only be reached by …
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New insights into diffusion and reaction of CO2 gas in recycled
Recycled aggregate concrete (RAC) is a representative cement-based composite that includes multiple porous materials. ... Mi et al. [48] proposed a ... The engineers are suggested to use the maximum carbonation depth to design the concrete cover of RAC structures for a target service life (i.e., 50–60 years) because this can make the ...
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A Comprehensive Review on Recycled Aggregate and Recycled Aggregate …
Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture …
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Optimization on the mix design method of self-compacting concrete …
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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Crooks Rd Plant #12 | Rochester Hills MI
Recycled Aggregates Rochester Hills/Crooks Plant #12 recycles concrete for construction aggregate needs. 248-244-3499. Part of the Great Lakes Aggregates family. ... Rochester Hills, MI 48309. Phone: 313-305-0513: crooks-scale@greatlakesagg. Hours. Weekdays: By appointment only:
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(PDF) Concrete Mix Design of Recycled Concrete Aggregate …
This review reveals that there is a need for systemic data collection that could enable automated concrete mix design. The findings concerning various mix concrete designs …
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Mix Design Method for Self-Compacting Recycled …
This article is on the development of a mix design method for self-compacting recycled aggregate concrete (SCRAC) by considering the adhered mortar content (AMC) on …
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Comprehensive Review Of Recycled Aggregate Concrete In …
Ammon Katz, (2003) "Properties of concrete made with recycled aggregate from partially hydrated old concrete", Cement and Concrete Research, 33, 703 – 711. Katz, A. (2004) "Treatments for the improvement of recycled aggregate", Journal of Materials in Civil Engineering-ASCE, 16(6), 597.
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Concrete Mix Design of Recycled Concrete Aggregate (RCA): …
This review reveals that there is a need for systemic data collection that could enable automated concrete mix design. The findings concerning various mix concrete designs …
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The Performance of Concrete Containing Recycled …
a practical solution for the use of recycled plastic. This will be done by adding various amounts of recycled plastic aggregates into concrete mixes. The aggregate will act as a replacement (by volume) for sand and will be added in amounts of 0, 10, 30, 50, and 70 percent. There will be a 28-day compressive strength test, using 3 samples for ...
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A framework for low-carbon mix design of recycled aggregate concrete
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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(PDF) Design Strategy for Recycled Aggregate …
For the past 20 years, recycled concrete aggregate from demolition and construction waste has been considered as an alternative to pure concrete in structural concrete to minimize the ...
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Compressive Behavior of Recycled Concrete Aggregate …
This is a pioneer study on Recycled Coarse Concrete Aggregate in the Philippines. Disposal of construction and demolition (C&Ds) wastes is yet to be specially addressed by the authorities in the ...
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Sustainable mix design of recycled aggregate concrete
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 Concrete Aggregates: A Review
RILEM: T ype 1 aggregates from masonry rubble, T ype 2 aggregates from concrete rubble; T ype 3 mixture of natural (min 80 %) and recycled (max 20 %) aggregate. 66
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Mix Design for Pervious Recycled Aggregate Concrete
The water absorption for 20 and 13 mm recycled concrete aggregates was 5.3 and 8.2 %, respectively, compared to 1.0 % for the natural aggregate. High water absorption and lower specific gravity for 13 mm recycled concrete aggregate are due to increased amount of weak attached mortar compared to that for 20 mm recycled concrete aggregate.
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Sustainable mix design of recycled aggregate concrete using artificial intelligence
In this paper, a natural aggregates concrete, NAC, and three recycled concrete aggregates RAC30, RAC65 and RAC100 were prepared on the basis of an imposed constant …
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