Standard concrete
A mixture of cement binder + sand + gravel + water
Another effect of the low pore volume in UHPC
is 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.
high pressure and tensile strength combined
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 make
concrete structures that are closer to steel structures than the ones in their dimensions
and bearing capacities.
www.hhbc-consulting.de
info@hhbc-consulting.de
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.
www.hhbc-consulting.de
info@hhbc-consulting.de
I'm already convinced that the UHPC beton as you describe in "playing in a different league" but mostly this always has something to do with costs. Can you write something to us and while you're at it, even where we can get this material. I would like to test it.
ReplyDeleteI will write in the next blog about the cost of UHPC compared to standard concrete
ReplyDelete