RETARDERS FOR CONCRETE AND THEIR EFFECTS ON SETTING TIME AND SHRINKAGE

SIXTY-FIVE PURE CHEMICALS AND THREE PROPRIETARY RETARDERS WERE TESTED IN THE PENETRATION TEST FOR SETTING TIME AT CONCENTRATIONS AT OR AROUND 0.1% OF THE CEMENT. THE MOST EFFECTIVE RETARDERS HAD SEVERAL, CLOSELY-GROUPED OXYGEN ATOMS IN HYDROXYL, CARBOXYL, OR CARBONYL GROUPS. SOME OF THE RETARDERS WERE USED IN THE FABRICATION OF 0.2 X 0.2 X4-IN. BARS OF CEMENT PASTE, WHICH WERE SUBSEQUENTLY OVEN-DRIED AND THE SHRINKAGE, NON-EVAPORABLE WATER CONTENT, AND SPECIFIC SURFACE OF THE PASTE WAS DETERMINED. THE RETARDERS CAUSED A CHANGE IN THE SHRINKAGE THAT WAS PARALLELED BY A CHANGE IN THE SPECIFIC SURFACE OF THE PASTE. /FHWA/

  • Supplemental Notes:
    • REP NO JHRP-51-72 Contract No HPR-1(10) PART II
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284

    Indiana State Highway Commission

    Indianapolis, IN  United States  46204

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • YAMAMOTO, Y
  • Publication Date: 0

Media Info

  • Pagination: 181 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00212133
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Int Rept
  • Files: TRIS, USDOT
  • Created Date: Apr 11 1974 12:00AM