THE DETERIORATION OF CONCRETE AND AGGREGATE USED IN ROADWAYS AND BRIDGE DECKS

A BRIEF HISTORY OF MODERN CONCRETE AND ITS ROLE IN HIGHWAY CONSTRUCTION IS PRESENTED AS AN INTRODUCTION IN DETERMINING THE NATURE OF CEMENT CONCRETE, PARTICULARLY THE CAUSES AND CURES OF DETERIORATION. THE BASIC COMPONENTS - PORTLAND CEMENT, SAND, CRUSHED AGGREGATE, AND WATER - ARE DESCRIBED. SOME OF THE CHEMICAL ADDITIVES TO CONTROL VARIOUS PROPERTIES OF THE MIXES ARE GIVEN: (1) CALCIUM CHLORIDE TO PROVIDE HIGH EARLY STRENGTH, (2) SODIUM NITRATE TO REDUCE THE CORROSIVE EFFECTS OF CALCIUM CHLORIDE ON REINFORCING STEEL, (3) AIR ENTRAINING AGENTS TO CONTROL AIR VOIDS, (4) LIGNOSULFONIC ACIDS AND THEIR SALTS AND HYDROXELATED CARBOXYLIC ACIDS AND THEIR SALTS FOR CONTROLLING THE RATE OF HYDRATION WITHOUT CHANGING THE OPTIMUM WATER CONTENT, AND (5) CALCIUM CHLORIDE AND SODIUM CHLORIDE OR MIXTURES OF THE TWO USED TO REDUCE ICING ON ROADWAY SURFACES. FURTHERMORE, THE CHEMISTRY OF CEMENTS AND CONCRETES IS REVIEWED TO DELINEATE THE PHYSICAL AND CHEMICAL CAUSES: LIKEWISE, THE CURES OF DETERIORATION ARE SEPARATED INTO PHYSICAL AND CHEMICAL CATEGORIES.

  • Corporate Authors:

    Colorado School of Mines

    Research Institute
    Golden, CO  United States  80401
  • Authors:
    • Pattengill, M G
  • Publication Date: 1971-5

Media Info

  • Features: Figures;
  • Pagination: 17 p.
  • Serial:
    • Volume: 14
    • Issue Number: 3

Subject/Index Terms

Filing Info

  • Accession Number: 00214140
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 7 1972 12:00AM