Title:
Properties of High-Strength Concrete at Low Temperatures
Author(s):
H. Marzouk and A. Houssein
Publication:
Materials Journal
Volume:
87
Issue:
2
Appears on pages(s):
167-171
Keywords:
compressive strength; fly ash; high-strength concretes; low temperature; marine atmospheres; mechanical properties; silica fume; elasticity; offshore structures; stress-strain relationships; Materials Research
DOI:
10.14359/1992
Date:
3/1/1990
Abstract:
This investigation deals with the effect of cold ocean water on the mechanical properties of green high-strength concrete containing silica fume and fly ash. Tests were performed on cylinders exposed in cold ocean water to temperatures varying from -10 to 20 C for periods of over 3 months. The test specimens were exposed after 24 hr of normal curing. Preliminary results of the investigation indicated that low temperature affects both strength and elasticity of concrete. For the specimens exposed to cold ocean water, the gain in strength at 28 and 91 days was 40 and 54 percent of their 3-day strength at room temperature. However, for the specimens exposed to temperatures of -10 C, the strength at 28 and 91 days was 97 and 91 percent of the 3-day strength at room temperatures, respectively. This low rate of maturity may be attributed to the fact that low temperature slows down the main hydration process. Thus, the rate of evolution of calcium hydroxide will decrease, and the secondary pozzolanic reaction will cease.