Waterproofing Slurry Treatment on Coarse Recycled Aggregates.
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| Title: | Waterproofing Slurry Treatment on Coarse Recycled Aggregates. |
|---|---|
| Authors: | Rampit-Greaves, Rekha1 rekha.rampit-greaves@uwi.edu, Smith, Jovanca1 jovanca.smith@uwi.edu |
| Source: | West Indian Journal of Engineering. Jan2026, Vol. 48 Issue 2, p46-53. 8p. |
| Subjects: | Waterproofing, Slurry, Mineral aggregates, Sustainability, Compressive strength, Circular economy, Solidification, Mechanical behavior of materials |
| Abstract: | For every pound of cement manufactured, approximately 0.9 pounds of carbon dioxide (CO2) is emitted into the atmosphere. Hence, recycling this waste concrete to produce a circular economy will be beneficial. Recycled concrete aggregates (RCAs) contain residual mortar or hardened cementitious paste made up of fine aggregates, hydrated and unhydrated cement particles. This residual mortar is more porous than natural aggregates. The RCAs can also have multiple interfacial transition zones between the residual mortar and the cement matrix, which can decrease the mechanical and durability strengths of the hardened concrete. This study investigated the treatment of RCAs with a solid waterproofing agent and determined whether this could improve the response of the material through densification of the attached RCA mortar. Positive changes were observed in absorption, bulk density, crushing, and impact strengths of treated RCAs, as well as the compressive strength of the concrete. The crystallinity of the treated RCA sample was higher than the untreated RCA sample, suggesting new hydration products. Investigation of the chemical composition of the waterproofing agent showed a high similarity to Ordinary Portland Cement (OPC), limiting its sustainability benefits. The slurry treatment improved the densification and mechanical properties of RCA, but due to its similarity to OPC, it will not be a good sustainable treatment approach for RCAs. [ABSTRACT FROM AUTHOR] |
| Copyright of West Indian Journal of Engineering is the property of University of the West Indies, Faculty of Engineering 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 | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 190538167 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Waterproofing Slurry Treatment on Coarse Recycled Aggregates. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Rampit-Greaves%2C+Rekha%22">Rampit-Greaves, Rekha</searchLink><relatesTo>1</relatesTo><i> rekha.rampit-greaves@uwi.edu</i><br /><searchLink fieldCode="AR" term="%22Smith%2C+Jovanca%22">Smith, Jovanca</searchLink><relatesTo>1</relatesTo><i> jovanca.smith@uwi.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22West+Indian+Journal+of+Engineering%22">West Indian Journal of Engineering</searchLink>. Jan2026, Vol. 48 Issue 2, p46-53. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Waterproofing%22">Waterproofing</searchLink><br /><searchLink fieldCode="DE" term="%22Slurry%22">Slurry</searchLink><br /><searchLink fieldCode="DE" term="%22Mineral+aggregates%22">Mineral aggregates</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink><br /><searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink><br /><searchLink fieldCode="DE" term="%22Circular+economy%22">Circular economy</searchLink><br /><searchLink fieldCode="DE" term="%22Solidification%22">Solidification</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: For every pound of cement manufactured, approximately 0.9 pounds of carbon dioxide (CO2) is emitted into the atmosphere. Hence, recycling this waste concrete to produce a circular economy will be beneficial. Recycled concrete aggregates (RCAs) contain residual mortar or hardened cementitious paste made up of fine aggregates, hydrated and unhydrated cement particles. This residual mortar is more porous than natural aggregates. The RCAs can also have multiple interfacial transition zones between the residual mortar and the cement matrix, which can decrease the mechanical and durability strengths of the hardened concrete. This study investigated the treatment of RCAs with a solid waterproofing agent and determined whether this could improve the response of the material through densification of the attached RCA mortar. Positive changes were observed in absorption, bulk density, crushing, and impact strengths of treated RCAs, as well as the compressive strength of the concrete. The crystallinity of the treated RCA sample was higher than the untreated RCA sample, suggesting new hydration products. Investigation of the chemical composition of the waterproofing agent showed a high similarity to Ordinary Portland Cement (OPC), limiting its sustainability benefits. The slurry treatment improved the densification and mechanical properties of RCA, but due to its similarity to OPC, it will not be a good sustainable treatment approach for RCAs. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of West Indian Journal of Engineering is the property of University of the West Indies, Faculty of Engineering 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: 10.47412/YKUN9203 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 46 Subjects: – SubjectFull: Waterproofing Type: general – SubjectFull: Slurry Type: general – SubjectFull: Mineral aggregates Type: general – SubjectFull: Sustainability Type: general – SubjectFull: Compressive strength Type: general – SubjectFull: Circular economy Type: general – SubjectFull: Solidification Type: general – SubjectFull: Mechanical behavior of materials Type: general Titles: – TitleFull: Waterproofing Slurry Treatment on Coarse Recycled Aggregates. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rampit-Greaves, Rekha – PersonEntity: Name: NameFull: Smith, Jovanca IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 05115728 Numbering: – Type: volume Value: 48 – Type: issue Value: 2 Titles: – TitleFull: West Indian Journal of Engineering Type: main |
| ResultId | 1 |
