THE EFFECT OF CALCIUM CHLORIDE ON CEMENT-AGGREGATE REACTION IN CONCRETE

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

  • Supplemental Notes:
    • Hpr-1/31, STATE 63-8D-1
  • Corporate Authors:

    Nebraska Department of Roads

    1500 Highway 2, P.O. Box 94759
    Lincoln, NE  USA  68509
  • Publication Date: 1965-7

Subject/Index Terms

Filing Info

  • Accession Number: 00211977
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Dec 1 1994 12:00AM