A mixture of cement binder + sand + gravel + water
UHPC concrete
A mixture of UHPC binder + sand + water
A mixture of UHPC binder + sand + water
One of the most important quality
parameters
when comparing standard concrete and UHPC
is water/cement ratio and compressive strength.
when comparing standard concrete and UHPC
 |
| Standard Cement Binder UHPC Binder |
The water/cement ratio is the ratio
of the weight of water to the weight of cement used in a concrete
mix.
A lower ratio leads to higher strength and durability, water/cement ratios of 0.4 to 0.5
are more typically used for standard concrete qualities. For higher-strength concrete, ratios of 0.20 - 0.18 are used.
A lower ratio leads to higher strength and durability, water/cement ratios of 0.4 to 0.5
are more typically used for standard concrete qualities. For higher-strength concrete, ratios of 0.20 - 0.18 are used.
Despite the extremely low w/c value,
UHPC materials of high production quality
can be processed in much
the same way as
concrete.
Among other things, the low w/c value
means that the pore volume is extremely low
or even absent, which leads to very high
compressive strength (up to 240 MPa) and
very high corrosion resistance. UHPC is also
self compacting.
means that the pore volume is extremely low
or even absent, which leads to very high
compressive strength (up to 240 MPa) and
very high corrosion resistance. UHPC is also
self compacting.
Another effect of the low pore volume
in UHPCis the extremely high content of wetted surface,
e.g. on steel reinforcements against concrete.
This leads to very strong connection of steel
and UHPC. If you wanted to pull a standard
reinforcing steel out of a UHPC block you
needed enormous tensile forces compared to
a standard concrete reinforcement.
Due to the extremely low pore volume
and the
with the exclusive use of sand as aggregate, the coverage of the reinforcement can be reduced. Likewise, the distance between the reinforcing bars could be reduced.
In this context, UHPC can be used to
makeconcrete structures that are closer to steel structures than the ones in their dimensions
and bearing capacities.
WPE DK International
Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com
