Relationship between critical mechanical properties and age for structural lightweight concrete.

Details

• Creators:
  Ledbetter, William B. ; Thompson, J. Neils
• Corporate Creators:
  University of Texas at Austin
• Corporate Contributors:
  Texas. Highway Department ; United States. Bureau of Public Roads
• Subject/TRT Terms:
  • Lightweight concrete
  • Mechanical properties
  • Structural analysis
• Publication/ Report Number:
  Report 55-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas. Highway Department
• Abstract:
  The necessity to use structural lightweight concrete has created ; a need for investigations into its critical mechanical properties that ; affect the design and performance of structures. The primary critical ; properties were found to be direct tensile stress-strain characteristics ; and the restrained volume changes. These two properties were experimentally ; determined and analyzed, along with the compressive, indirect ; tensile (split cylinder), and flexural strengths. With age as a fundamental ; variable, these properties were determined for several curing-condition ; and mix-design parameters. ; A primary finding from this study was the good correlation ; exhibited between direct tensile strength and both compressive strength ; and indirect tensile strength. A direct tensile test method was developed ; which yields consistently reliable results and from which valuable information ; On fundamental concrete tensile behavior can be obtained. Along with ; the concrete direct tensile properties, this test yielded information on ; the effects of restraining the concrete from changing in volume as a ; result of hydration and changes in moisture. This restraint was ; developed by the inclusion of a deformed bar through the specimen. ; The concrete stresses developed from this restraint yielded important ; clues toward a better understanding of concrete behavior. It was found ; that this type of structural lightweight concrete, when oven dried at ; 1l0F, attempts to shrink resulting in restrained tensile concrete ; stresses as high as 70 per cent of the concretets tensile strength.
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• Format:
  PDF
• Funding:
  HPR 1(2) and 1(3) ; Interagency Contract No, 4413-767 ; Project No. 3-8-63-55
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31645/dot_31645_DS1.pdf
• File Type:
  [PDF - 3.23 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a4e94da8b831b654f452d8ca5514297935bb395fc787046471d93d744569e88e