Indented PC Wire

The pre-stressed steel wire is tensioned approx. 70 to 80% of the minimum specified breaking load of steel wire prior to casting of concrete. Indented PC WireAfter initial setting of concrete, the pre-tensioned steel wire is released and the stress in the wire is induced in the concrete. This induced compressive stress will neutralize the tensile stress caused by the acting loads on the concrete member. In the case of pre-tensioning, it is important that adequate bond is created between the steel wire and concrete in order to transfer the desired compressive force from the steel wire to the concrete.

In order to improve the bond strength and achieve a consistently low transmission length, regular indentations of specified shape in the wire surface in either opposite or 120-degree planes or 90-degree planes were introduced. In the known art of indenting operation, it is possible only to make 2, 3 or 4-sided intermittent indentation on the surface of the wire. This indentation is normally carried out on a wire-drawing machine and is effected by pulling the wire through appropriate indenting rolls.

Advantages

• - Improves the bond strength between pre-stressed steel wire and concrete
• - Reduces the frictional losses between pre-stressed wire and concrete
• - Increases the anchorage efficiency
• - Maintains higher effective pre-stressing force in the structure
• - Reduces the number of operations at the customer end

We can produce two-sides, three-sides, four-side indented PC wire, and the products with different diameters, different tensile strengths, and different national standards. At present, our product has been applied in Australia, America, Britain, Brazil etc. more than 20 countries.

Key parameter & reference standards of Indented PC wire.

We list four types of indented PC wire below:

1. PC Wire GOST 7348-81
   The wire is intended for reinforcement of prestressed concrete constructions.
   The manufactured wire has round or two-side die-rolled section; hardened or hardened under tension (stabilized).
   

   Mechanical properties

   Diameter (mm)	Range of nominal depths of indentation (mm)	Spacing (mm)	Tensile strength (N/mm2)	Breaking load (KN)	Relaxation (%)
   3.0	0.15	5.5 - 7.0	1780	12.6	2.5
   4.0	0.19		1700	21.4
   5.0	0.24		1670	32.8

   Packing

   Diameter(mm)	Type	Weight(KG)	Internal diameter(mm)
   4.0, 5.0	Coils	Up to 1500	1300
   3.0	Coils	Up to 800	400

2. PC wire prEN 10138-2-2006
   The wire is intended for reinforcement of prestressed concrete constructions.
   The manufactured wire has round or three-sided die-rolled section.
   

   Mechanical properties

   Diameter (mm)	Range of nominal depths of indentation (mm)	Depth tolerance on chosen nominal depth (mm)	Length (mm)	Spacing (mm)	Tensile strength (N/mm2)	Weight (g/m)	Breaking load (KN)
   5.0	0.06 - 0.13	±0.03	3.5±0.5	5.5±0.5	1770	153.1	34.7
   6.0	0.09 - 0.16	±0.04	5.0±0.5	8.0±0.5	1670	221.0	47.3
   7.0						300.7	64.3

   Packing

   Type	Weight(KG)	Internal diameter(mm)
   Coils	Up to 1500	1300

3. PC Wire　BS 5896-1980
   The wire is intended for reinforcement of prestressed concrete constructions.
   The manufactured wire has round or three-sided die-rolled section.
   

   Mechanical properties

   Diameter (mm)	Range of nominal depths of indentation (mm)	Depth tolerance on chosen nominal depth (mm)	Length (mm)	Spacing (mm)	Tensile strength (N/mm2)	Weight (g/m)	Breaking load (KN)
   5.0	±0.05	0.15±0.05	3.5	5.5	1770	154	34.7
   6.0		0.15±0.05	5.0	8.0	1670	222	47.3
   7.0						302	64.3

   Packing

   Type	Weight(KG)	Internal diameter(mm)
   Coils	Up to 1500	1300

4. PC Wire TU 14-4-1681-91
   The wire is intended for reinforcement of prestressed concrete sleepers
   The shipped wire has two-sided die-rolled section.
   

   Mechanical properties

   Diameter (mm)	Diameter tolerance (mm)	Minimal depth of indentation (mm)	Spacing (mm)	Tensile strength (N/mm2)	Minimal breaking load (KN)
   3.0	±0.06	0.15	5.5 - 7.0	1700	12

   Packing

   Type	Weight (KG)	Internal diameter (mm)
   Coils	Up to 800	400