Effect of Pozzolanic Admixtures on Thermal Properties of Lightweight Cement-Based Foams.
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| Title: | Effect of Pozzolanic Admixtures on Thermal Properties of Lightweight Cement-Based Foams. |
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| Authors: | Batool, F.1, Bindiganavile, V.2 |
| Source: | Journal of Testing & Evaluation. Sep2017, Vol. 45 Issue 5, p1764-1776. 13p. |
| Abstract: | This experimental study was conducted to investigate the effect of pozzolanic admixtures on the thermal conductivity of lightweight cement-based foam (LW-CBF). The foam mixes were cast and tested for three different densities namely, 800, 600, and 400 kg/m³. Three different pozzolanic admixtures namely, fly ash, silica fume, and metakaolin, were examined here. Fly ash was incorporated at up to 50 % mass substitution of cement, while silica fume and metakaolin were incorporated in the binder at up to 20 % replacement by cement mass. Density, moisture content, and thermal conductivity were measured experimentally, while porosity was evaluated theoretically. The transient line source (TLS), which conformed to ASTM standards, was used to assess the thermal conductivity in this study. It was found that the thermal conductivity of the cement-based foam samples was proportional to the cast density in the range examined with, on average, a 20 % drop in conductivity between 800 and 400 kg/m³. In addition, it was found that adding pozzolanic admixtures resulted in a higher moisture content. Furthermore, of the three pozzolanic admixtures, silica fume was the most efficient, causing a 30 % drop, whereas metakaolin was the least at a mere 10 % decline for equal dosage. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Testing & Evaluation is the property of ASTM International 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 125596511 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effect of Pozzolanic Admixtures on Thermal Properties of Lightweight Cement-Based Foams. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Batool%2C+F%2E%22">Batool, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bindiganavile%2C+V%2E%22">Bindiganavile, V.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Testing+%26+Evaluation%22">Journal of Testing & Evaluation</searchLink>. Sep2017, Vol. 45 Issue 5, p1764-1776. 13p. – Name: Abstract Label: Abstract Group: Ab Data: This experimental study was conducted to investigate the effect of pozzolanic admixtures on the thermal conductivity of lightweight cement-based foam (LW-CBF). The foam mixes were cast and tested for three different densities namely, 800, 600, and 400 kg/m³. Three different pozzolanic admixtures namely, fly ash, silica fume, and metakaolin, were examined here. Fly ash was incorporated at up to 50 % mass substitution of cement, while silica fume and metakaolin were incorporated in the binder at up to 20 % replacement by cement mass. Density, moisture content, and thermal conductivity were measured experimentally, while porosity was evaluated theoretically. The transient line source (TLS), which conformed to ASTM standards, was used to assess the thermal conductivity in this study. It was found that the thermal conductivity of the cement-based foam samples was proportional to the cast density in the range examined with, on average, a 20 % drop in conductivity between 800 and 400 kg/m³. In addition, it was found that adding pozzolanic admixtures resulted in a higher moisture content. Furthermore, of the three pozzolanic admixtures, silica fume was the most efficient, causing a 30 % drop, whereas metakaolin was the least at a mere 10 % decline for equal dosage. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Testing & Evaluation is the property of ASTM International 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: BibEntity: Identifiers: – Type: doi Value: 10.1520/JTE20150496 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1764 Titles: – TitleFull: Effect of Pozzolanic Admixtures on Thermal Properties of Lightweight Cement-Based Foams. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Batool, F. – PersonEntity: Name: NameFull: Bindiganavile, V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00903973 Numbering: – Type: volume Value: 45 – Type: issue Value: 5 Titles: – TitleFull: Journal of Testing & Evaluation Type: main |
| ResultId | 1 |
