When Prestressed concrete steel strand is coated with a layer of
grease and plastic sheathing, in the engineering construction, the
steel strand will be separated from the concrete and loose as it's
embedded with grease and plastic sheathing, remaining an unbonded
state, it's called Unbonded prestressed concrete steel strand.
Made with steel wire or strand, small friction loss, no need of a
secondary filling, and convenient construction.
Field of Application:
Used in large-bay plate type structures, water aqueducts,
large-diameter pipes, foundation anchors.
The implementation standard is JG161-2004, Unbonded prestressed
concrete steel strand with other standards can be provided
according to customer's requirements, and the sheathed color of
Unbonded prestressed concrete steel strand can also be determined
by the customer.
|Strandfor Prestressed Concrete||Anti-corrosion Grease Mass|
|Friction Factor|| |
|‰¥ 32||0.8||0.04~0.10||0.003~0.004|| |
|12.7||98.7||‰¥ 43||1.0|| |
|15.2||140||‰¥ 50||1.0|| |