CORRELATION STUDIES OF FUNDAMENTAL AGGREGATE PROPERTIES WITH FREEZE-THAW DURABILITY OF STRUCTURAL LIGHTWEIGHT CONCRETE

A CORRELATION IS MADE OF THE DURABILITY OF STRUCTURAL LIGHTWEIGHT CONCRETE WITH /A/ TYPE OF LIGHTWEIGHT COARSE AGGREGATE, /B/ CEMENT FACTOR AND /C/ FREEZE-THAW DURABILITY OF SELECTED CONCRETES. A DETERMINATION IS MADE IF TYPES OF LIGHTWEIGHT AGGREGATE COULD BE DESCRIBED ACCORDING TO FUNDAMENTAL PROPERTIES. THIS INCLUDED ABSORPTION, BULK SPECIFIC GRAVITY, DRY UNIT WEIGHT, SIEVE ANALYSIS, PETROGRAPHIC ANALYSIS, X-RAY DIFFRACTION PATTERN AND RESISTANCE TO FREEZE-THAW. CONCRETE SPECIMENS WERE SUBJECTED TO RAPID FREEZING IN AIR AND THAWING IN WATER. COMPRESSIVE AND SPLITTING TENSILE STRENGTHS WERE DETERMINED. CONCLUSIONS FROM THE RESULTS OF TESTS ON FIVE LIGHTWEIGHT AGGREGATES AND THE CONCRETES WERE' /1/ WIDE DIFFERENCES WERE FOUND IN THE ENGINEERING PROPERTIES, /2/ LIGHTWEIGHT AGGREGATES ARE COMPOSED LARGELY OF POROUS GLASS IN AMORPHOUS FORM, /3/ WIDE VARIATION EXISTS IN PORE SIZE, PORE SPACING, AND EXTENT OF CRYSTALLINITY, /4/ TYPE OF LIGHTWEIGHT AGGREGATE INFLUENCED THE RESISTANCE TO FREEZING AND THAWING OF NON-AIR-ENTRAINED CONCRETE, AND /5/ NO CORRELATION WAS OBTAINED BETWEEN AGGREGATE ABSORPTION AND CONCRETE DURABILITY.

• Supplemental Notes:
  • Hrp, 2-8, 65-81
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011
• Authors:
  • Ledbetter, W B
• Publication Date: 1965-8-1

Subject/Index Terms

• TRT Terms: Absorption; Aggregates; Analysis; Cement factor; Coarse aggregates; Compression tests; Concrete; Correlation analysis; Diffraction; Durability; Freeze thaw durability; Freeze thaw tests; Lightweight aggregates; Lightweight concrete; Petrography; Sieve analysis; Specific gravity; Specimens; Structures; Studies; Tensile strength; Testing; Weight; X rays
• Uncontrolled Terms: Dry unit weight; Patterns; X-ray diffraction
• Old TRIS Terms: Aggregate characteristics; Compressive strength tests; Structural
• Subject Areas: Bridges and other structures; Data and Information Technology; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217457
• Record Type: Publication
• Files: ITRD, TRIS
• Created Date: Mar 1 1994 12:00AM