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Comparative study of the mechanical and thermal properties of lightweight cementitious composites.

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Title: Comparative study of the mechanical and thermal properties of lightweight cementitious composites.
Authors: Brooks, Adam L.1, Zhou, Hongyu1 hongyu.zhou@uah.edu, Hanna, Dominic1
Source: Construction & Building Materials. Jan2018, Vol. 159, p316-328. 13p.
Subjects: Lightweight concrete, Cement composites, Polystyrene, Microspheres, Fly ash analysis
Abstract: Lightweight concrete and cementitious composites are increasingly studied by researchers due to their advantageous performance in reducing structural load and building’s operational energy consumption. In this research, a comprehensive and thorough study was carried out to investigate the effects of different lightweight fillers on both the mechanical and thermal properties of lightweight cementitious composites, or LWCCs. Four different types of lightweight fillers (LWFs) including expanded polystyrene (EPS) beads, dry-expanded thermoplastic microspheres (ETM), hollow glass microspheres (HGM), and fly ash cenospheres (FACs) are studied in conjunction with various particle sizes, shell wall thickness, and proportions. Both mechanical and thermophysical properties were tested for these LWCCs after 28-day curing. The results indicated that the thermal property of LWCC is mostly governed by the volume fraction of LWFs and it can be accurately predicted by the Felske equation, whereas the mechanical properties are heavily affected by the type and property of LWF particles included. It was revealed that most fly ash cenospheres (FAC) and hollow glass microspheres (HGM) with higher density are suitable for producing LWCC materials that may be used for structural applications, whereas lower density HGMs and LWFs with soft polymer shell are more suitable for nonstructural thermal insulating components. [ABSTRACT FROM AUTHOR]
Copyright of Construction & Building Materials 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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Header DbId: egs
DbLabel: Engineering Source
An: 126806091
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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IllustrationInfo
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  Data: Comparative study of the mechanical and thermal properties of lightweight cementitious composites.
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  Data: <searchLink fieldCode="AR" term="%22Brooks%2C+Adam+L%2E%22">Brooks, Adam L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Hongyu%22">Zhou, Hongyu</searchLink><relatesTo>1</relatesTo><i> hongyu.zhou@uah.edu</i><br /><searchLink fieldCode="AR" term="%22Hanna%2C+Dominic%22">Hanna, Dominic</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Jan2018, Vol. 159, p316-328. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Lightweight+concrete%22">Lightweight concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Cement+composites%22">Cement composites</searchLink><br /><searchLink fieldCode="DE" term="%22Polystyrene%22">Polystyrene</searchLink><br /><searchLink fieldCode="DE" term="%22Microspheres%22">Microspheres</searchLink><br /><searchLink fieldCode="DE" term="%22Fly+ash+analysis%22">Fly ash analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Lightweight concrete and cementitious composites are increasingly studied by researchers due to their advantageous performance in reducing structural load and building’s operational energy consumption. In this research, a comprehensive and thorough study was carried out to investigate the effects of different lightweight fillers on both the mechanical and thermal properties of lightweight cementitious composites, or LWCCs. Four different types of lightweight fillers (LWFs) including expanded polystyrene (EPS) beads, dry-expanded thermoplastic microspheres (ETM), hollow glass microspheres (HGM), and fly ash cenospheres (FACs) are studied in conjunction with various particle sizes, shell wall thickness, and proportions. Both mechanical and thermophysical properties were tested for these LWCCs after 28-day curing. The results indicated that the thermal property of LWCC is mostly governed by the volume fraction of LWFs and it can be accurately predicted by the Felske equation, whereas the mechanical properties are heavily affected by the type and property of LWF particles included. It was revealed that most fly ash cenospheres (FAC) and hollow glass microspheres (HGM) with higher density are suitable for producing LWCC materials that may be used for structural applications, whereas lower density HGMs and LWFs with soft polymer shell are more suitable for nonstructural thermal insulating components. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Construction & Building Materials 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.conbuildmat.2017.10.102
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 316
    Subjects:
      – SubjectFull: Lightweight concrete
        Type: general
      – SubjectFull: Cement composites
        Type: general
      – SubjectFull: Polystyrene
        Type: general
      – SubjectFull: Microspheres
        Type: general
      – SubjectFull: Fly ash analysis
        Type: general
    Titles:
      – TitleFull: Comparative study of the mechanical and thermal properties of lightweight cementitious composites.
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            NameFull: Brooks, Adam L.
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            NameFull: Zhou, Hongyu
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            NameFull: Hanna, Dominic
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            – D: 20
              M: 01
              Text: Jan2018
              Type: published
              Y: 2018
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              Value: 159
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