ACRYLIC POWDER MODIFIED PORTLAND CEMENT

Since the early 1960s, the primary functions of polymer in modifying cement have been identified and demonstrated for indoor and outdoor applications. The effectiveness of using pure acrylic polymer in cement modification can be attributed to the unique acrylic chemistry combined with special polymer designs and processes. Both acrylic powder and acrylic latex depend on the acrylic backbone to provide excellent performance and durability, particularly for exterior applications. Newly developed acrylic redispersible powder preserves acrylic latex performance in mechanical strength, adhesion, and water resistance as illustrated by various tests under wet- and dry-exposure conditions. In addition, use of acrylic powder as a "one-package" alternative to latex facilitates on-site handling, environmental protection, and reduces packaging and transportation costs. This paper presents the findings of a performance comparison between acrylic redispersible powder and acrylic latex in cement modification. The polymer-modified mortar properties were assessed and compared in a typical concrete repair mortar and a ceramic tile formulation. The exterior durability of acrylic powder modified repair mortar was demonstrated through exterior exposure tests. The modification efficiency of acrylic powder was also examined at various polymer levels in a patching formulation that compared favorably to other commercial powders at lower polymer level usage.

Language

  • English

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Filing Info

  • Accession Number: 00716458
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1996 12:00AM