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Concrete is a kind of material widely used in the construc- on
industry. Because of its popularity inconstruction application
, a thorough understanding ofits particular behavior and
working ability becomesvery important to us. In this thesis,
the studies are emphasized on the fresh concrete at very low
temperature, especially those inthe environ- ment of -15℃. To
investigate its rate ofstrength development and the expansion
rate duringfreezing. We also apply the pressure-re- sisting
intensityat thaw of different period of times to analyzet
heconcrete character during the early ages, the slumpphenomena,
and the influences to the pressure-resistingstrength in the
concrete. To reach these purposes, the research include the
following experiments for: 1. Determination of basic and
physical properties of the ingredient in the concrete. 2. Its
pressure-resisting strength at ambient temperature. 3. Its
pressure-resisting strength at freezing periods. 4. Concrete
properties at thaw. 5. Expansion behavior of the icing
concrete. 6. Frozen concrete properties in the water when
thawing. In review of these studies, we conclude that a full
understanding of the concrete behavior in the icing case will
give us a very valuable information for reference. It help not
only for us to predict the servibility of frozen concrete to
the jobs,but also give the reasonable means to the design works.
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