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Durability Study of Semi-Lightweight Concrete Made with Haydite Aggregate

• ID:

  980

• ESCSI:

  4384.004

• Author:

  Zolders, N.G. and H.S. Wilson

• Publication Name:

  (Canada) Mines Branch Investigation Report IR 69-18

• Type of Publication:

  Paper

• Publisher:

  Canada Department of Energy, Mines and Resources

• Dated:

  1969

• Issue/Volume:

  April

• Other ID:

• Page(s):

  1-33

• Reference List:

  N

• Abstract:

  The durability of Haydite concrete was assessed by exposing 3 1/2 x 4 x 15-in test beams to 1000 cycles of accelerated freezing and thawing.The loss in weight of test specimens never exceeded one per cent and was caused mainly by scattered surface popouts.
  The expansion of test specimens ranged from 0.01 to 0.02 per cent, which is well below the specified maximum limit of 0.10 per cent.
  The non-destructive test methods did not reveal any general deterioration of concrete and the durability factor after 1000 freeze-thaw cycles was over 100 per cent in all test series.
  Flexural strength tests showed that the strength of the freeze-thaw test specimens had increased even after 1000 cycles of exposure; however, it was 9 per cent lower than that of the companion moist-cured beams.
  A limited number of popouts, which started to develop after 500 cycles, indicated the presence of unsound aggregate particles.