Detection of lignosulfonate retarder in cement suspensions and pastes

Download
  1. (PDF, 970 KB)
  2. Get@NRC: Detection of lignosulfonate retarder in cement suspensions and pastes (Opens in a new window)
AuthorSearch for: ; Search for:
TypeArticle
Journal titleASTM Special Technical Publication
ISSN0066-0558
Issue266
Pages159169; # of pages: 11
Subjectplasticizers; portland cement; hydration; hydrolysis; Admixtures; plastifiant (adjuvant); ciment portland; hydratation; hydrolyse
AbstractThe 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.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-107
NRC number5661
384
NPARC number20375253
Export citationExport as RIS
Report a correctionReport a correction
Record identifierdf570e3b-cfdf-4fdb-b4fd-af7400b5ad89
Record created2012-07-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: