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Influence of Effective Water-to-Cement Ratios on Internal Damage and Salt Scaling of Concrete with Superabsorbent Polymer
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Minsoo | - |
dc.contributor.author | Kang, Sung-Hoon | - |
dc.contributor.author | Hong, Sung-Gul | - |
dc.contributor.author | Moon, Juhyuk | - |
dc.date.accessioned | 2023-07-11T01:31:21Z | - |
dc.date.available | 2023-07-11T01:31:21Z | - |
dc.date.created | 2020-02-18 | - |
dc.date.created | 2020-02-18 | - |
dc.date.created | 2020-02-18 | - |
dc.date.created | 2020-02-18 | - |
dc.date.issued | 2019-12 | - |
dc.identifier.citation | Materials, Vol.12 No.23, p. 3863 | - |
dc.identifier.issn | 1996-1944 | - |
dc.identifier.uri | https://hdl.handle.net/10371/195063 | - |
dc.description.abstract | Superabsorbent polymer (SAP) is attracting attention as a water-entraining admixture that reduces shrinkage or heals cracks in concrete. Cross-linked sodium polyacrylate SAPs, which are the most widely produced SAPs in the global market, are applicable as concrete admixtures. However, there have been contradictory results on the freeze-thaw resistance of concrete with SAPs. This study aims to clarify these results considering the water absorption behavior of SAPs in hardened concrete when effective water-to-cement ratios are different. Firstly, the absorbencies of one kind of cross-linked sodium polyacrylate SAP (SAP_SP) in pore solution and fresh mortar were measured by a tea bag test and flow test, respectively. Pore size distribution, capillary water absorption, and deformation during freeze-thaw cycles were analyzed for mortar samples with varying SAP_SP dosages. In the main tests, concrete samples with three different SAP_SPs/cement ratios (0.1%, 0.2%, and 0.3%) and a reference sample were prepared, and internal damage and salt scaling were measured under freeze-thaw cycles. Because SAP_SP absorbs water in fresh mixtures, additional water was added to the mixture considering the water absorbency of the SAP_SP. It was found that the used SAP_SPs prematurely release their stored water so the effective water-to-cement ratio was increased when a larger amount of SAP_SP was used. The higher effective water-to-cement ratio caused more internal damage and salt scaling due to the weaker cementitious matrix. In addition, mortar samples with a high SAP_SP content show a larger absorption of capillary water than the reference sample. The result can be interpreted by an observation that SAP_SP in air voids absorbs water and expands to relatively large capillary pores or neighbor air voids during the capillary water absorption process. | - |
dc.language | 영어 | - |
dc.publisher | MDPI Open Access Publishing | - |
dc.title | Influence of Effective Water-to-Cement Ratios on Internal Damage and Salt Scaling of Concrete with Superabsorbent Polymer | - |
dc.type | Article | - |
dc.identifier.doi | 10.3390/ma12233863 | - |
dc.citation.journaltitle | Materials | - |
dc.identifier.wosid | 000510178700059 | - |
dc.identifier.scopusid | 2-s2.0-85079478134 | - |
dc.citation.number | 23 | - |
dc.citation.startpage | 3863 | - |
dc.citation.volume | 12 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Hong, Sung-Gul | - |
dc.contributor.affiliatedAuthor | Moon, Juhyuk | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SAP | - |
dc.subject.keywordAuthor | superabsorbent polymer | - |
dc.subject.keywordAuthor | absorbency | - |
dc.subject.keywordAuthor | capillary absorption | - |
dc.subject.keywordAuthor | freezing and thawing | - |
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