Performance and Mechanism of a Multi-Functional Superplasticizer for Concrete

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Shrinkage reducing admixtures (SRA) have been used for several years to reduce the shrinkage of concrete. However, because their prices are very expensive and their dosages are very large, it is not economical for their practical application. Another problem of SRA is the degradation of compressive strength of concrete with SRA. In order to solve the two problems, a new polycarboxylate based superplasticizer with shrinkage reducing function was developed and its mechanism was investigated. According to experimental results, the admixture named JM-PCA (IV) reduces shrinkage of concrete effectively and reduces water content effectively. JM-PCA (IV) at a dosage of 0.25% decreases the shrinkage of concrete by about 40 to 55 percent at 28 days and 60 days when compared with sulfonated naphthalene formaldehyde condensate superplasticizer at a dosage 0.74%. The possible reason is that a shrinkage reducing component (SRC) and long ethylene oxides(EO) side chain were introduced into the molecular structure. The adsorption-reduction of interface tension is thought to be its main action mechanism of the reduction of shrinkage of JM-PCA (IV).

収録刊行物

  • Materials transactions  

    Materials transactions 47(6), 1599-1604, 2006-06-20 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10018160740
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13459678
  • NDL 記事登録ID
    7951159
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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