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Improving of Recycled Aggregate Quality by Thermal-mechanical-chemical Process.

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Title: Improving of Recycled Aggregate Quality by Thermal-mechanical-chemical Process.
Authors: Kencanawati, Ni Nyoman1 nkencanawati@ts.ftunram.ac.id, Akmaluddin, null1, Merdana, I. Nyoman1, Nuraida, Nonik1, Hadi, Imam Robbani1, Shigeishi, Mitsuhiro2
Source: Procedia Engineering. 2017, Vol. 171, p640-644. 5p.
Subjects: Sustainable construction, Mineral aggregates, Concrete waste, Building materials recycling, Thermomechanical treatment, Construction industry
Abstract: To save natural resources and promote the sustainable development of construction industry, the use recycled coarse aggregate (RCA) from waste concrete has been encouraged recently. However, it is widely accepted that RCA concrete has lower performance about 15% to 20% than that of natural aggregate concrete. The adhered mortar on RCA surfaces causes lower quality of RCA produced through conventional recycling process. Therefore, it is necessary to provide higher quality of RCA from waste concrete by detaching old mortar as much as possible; so that the quality of RCA concrete can be improved as well. This research proposes a thermal-mechanical-chemical process to produce better properties of RCA from waste concrete. Then, new concrete was produced by utilizing the RCA. Results indicate that the physical properties of RCA are close to natural aggregate and meet the requirement of Indonesian Standard for concrete aggregate. Furthermore, the mechanical performance of RCA concrete produced by the proposed method has better mechanical properties to that of conventional RCA. It is about 3-8% lower than the mechanical properties of natural coarse aggregate concrete. [ABSTRACT FROM AUTHOR]
Copyright of Procedia Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 121357969
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Improving of Recycled Aggregate Quality by Thermal-mechanical-chemical Process.
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  Data: <searchLink fieldCode="JN" term="%22Procedia+Engineering%22">Procedia Engineering</searchLink>. 2017, Vol. 171, p640-644. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Sustainable+construction%22">Sustainable construction</searchLink><br /><searchLink fieldCode="DE" term="%22Mineral+aggregates%22">Mineral aggregates</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+waste%22">Concrete waste</searchLink><br /><searchLink fieldCode="DE" term="%22Building+materials+recycling%22">Building materials recycling</searchLink><br /><searchLink fieldCode="DE" term="%22Thermomechanical+treatment%22">Thermomechanical treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Construction+industry%22">Construction industry</searchLink>
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  Label: Abstract
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  Data: To save natural resources and promote the sustainable development of construction industry, the use recycled coarse aggregate (RCA) from waste concrete has been encouraged recently. However, it is widely accepted that RCA concrete has lower performance about 15% to 20% than that of natural aggregate concrete. The adhered mortar on RCA surfaces causes lower quality of RCA produced through conventional recycling process. Therefore, it is necessary to provide higher quality of RCA from waste concrete by detaching old mortar as much as possible; so that the quality of RCA concrete can be improved as well. This research proposes a thermal-mechanical-chemical process to produce better properties of RCA from waste concrete. Then, new concrete was produced by utilizing the RCA. Results indicate that the physical properties of RCA are close to natural aggregate and meet the requirement of Indonesian Standard for concrete aggregate. Furthermore, the mechanical performance of RCA concrete produced by the proposed method has better mechanical properties to that of conventional RCA. It is about 3-8% lower than the mechanical properties of natural coarse aggregate concrete. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Procedia Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.proeng.2017.01.399
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      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 640
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      – SubjectFull: Sustainable construction
        Type: general
      – SubjectFull: Mineral aggregates
        Type: general
      – SubjectFull: Concrete waste
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      – SubjectFull: Building materials recycling
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      – SubjectFull: Thermomechanical treatment
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      – SubjectFull: Construction industry
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      – TitleFull: Improving of Recycled Aggregate Quality by Thermal-mechanical-chemical Process.
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            NameFull: Kencanawati, Ni Nyoman
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            NameFull: Hadi, Imam Robbani
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              Text: 2017
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