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.
  
  
• Format:
  PDF
• Funding:
  HPR 1(2) and 1(3) ; Interagency Contract No, 4413-767 ; Project No. 3-8-63-55
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a4e94da8b831b654f452d8ca5514297935bb395fc787046471d93d744569e88e
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31645/dot_31645_DS1.pdf
• File Type:
  [PDF - 3.23 MB ]