| Download | - View final version: Detection of lignosulfonate retarder in cement suspensions and pastes (PDF, 1.3 MiB)
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| Author | Search for: Swenson, E. G.; Search for: Thorvaldson, T. |
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| Sponsor | Search for: American Society for Testing and Materials |
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| Format | Text, Article |
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| Subject | Admixtures; plasticizers; Portland cement; hydration; hydrolysis |
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| Abstract | The problem of detecting the presence of the lignosulfonate type of retarder of plasticizer in hardened cement paste is investigated by a spectrophotometric method based on ultraviolet absorbance measurements of aqueous extracts. The interaction of hydrating Portland cement and lignosulfonate salt, whether in water suspension or in hardened paste, results in the disappearance of the charateristic 280 m mu maximum of the original lignosulfonate and the appearance of two new maxima at wavelengths of 245 and 350 m mu. This change is attributed to alkaline hydrolysis, with the formation of vanillin. The experimental results are discussed in relation to the qualitative and quantitative aspects of the method in detecting lignosulfonates in Portland-cement products. |
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| Publication date | 1960-09-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | DBR-RP-107 |
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| NRC number | NRCC 5661
NRC-IRC-384 |
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| NPARC number | 20375253 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | df570e3b-cfdf-4fdb-b4fd-af7400b5ad89 |
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| Record created | 2012-07-23 |
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| Record modified | 2023-12-22 |
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