PROTECTING CONCRETE AGAINST CHLORIDE INGRESS BY LATEX ADDITIONS . PROTECTION OF CONCRETE. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE HELD AT THE UNIVERSITY OF DUNDEE, SEPTEMBER 11-13, 1990

A latex has been developed that effectively blocks chloride from entering mortar or concrete that has been modified by this polymer. The necessary dosage for adequate protection against chloride ingress is found to be dependent on the water content ratio and the content of entrained air. A 10% addition of the polymer has proven to be sufficient even at high air contents (approximately 10 vol%) and moderate water content ratios (0.55). The effectiveness of this new polymer, compared with three commercially available polymers, is probably due to the functional monomers incorporated in the chain. Thus, since the functional monomers are capable of forming chemical bonds with the cement minerals, the polymer-cement complex will be insensitive to moisture once it is formed. Other polymers are believed to partially reemulsify when the polymer cement concretes are immersed in water. One commercially available polymer containing copolymerized vinylchloride, has been proven to produce free chloride during hydrolysis in the alkaline interior of the mortar. The protection of concrete by the new latex is also superior to that provided by condensed silica fume (10% replacement). (Author/TRRL)

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  • Corporate Authors:

    E and F Spon Limited

    2-6 Boundary Road
    London,   England 
  • Authors:
    • Justnes, H
    • Oye, B A
    • Dennington, S P
  • Publication Date: 1990

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Filing Info

  • Accession Number: 00620029
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: O-419-15490-6
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1992 12:00AM