PC STRAND

Content

PC STRAND

Production Features
PC wire and PC strand have following features:high strength,low stress,stable construction,good combination with concrete,saving material,reducing distortion and construct weight,increasing the abrasion resistance and fatigue resistance,water resistance,stiffness.
Range of Application
The products are applied widely as follows: bridges,buildings, pressure pipes,rails, storages,poles and water towers etc concrete structures and components.They also used in tall,wide span,heavy load,and anti-seismic structure,civil engineering,oceaneering, nuclear power station etc.

Physical Characteristic of construction 1X7 strand

(ASTM A416/A416M-2002)

Construction	Nominal Diameter (mm)	Nominal setion (mm²)	Nominal weight (kg/1000m)	The minimum breaking Load (kn)	Requirement of fatigue Strength
					Initial load (kn)	Minimum load for elongation of 1% kn pour 1% (kn)
					Initial load (kn)	Normal relaxation	Low relaxation
1X7	1725 Grade
	6.35	23.22	182	40.0	4.0	34.0	36.0
	7.94	37.42	294	64.5	6.5	54.7	58.1
	9.53	51.61	405	89.0	8.9	75.6	80.1
	11.11	69.68	548	120.1	12.0	102.3	108.1
	12.70	92.90	730	160.1	16.0	136.2	144.0
	15.24	139.35	1094	240.2	24	204.2	216.2
	1860 Grade
	9.53	54.84	432	102.3	10.2	87.0	92.1
	11.11	74.19	582	137.9	13.8	117.2	124.1
	12.70	98.71	775	183.7	18.4	156.1	165.3
	15.24	140.00	1102	260.7	26.1	221.5	234.6

(1) Characteristics of relaxation -1000 hours after commencing low relaxation test, when initial load is 70% of specified load, the relaxation loss is not than 2.5%, or when initial load is 80% of specified load,the relaxation loss is not wore than 3.5%

(2) Elongation when the loaded test length is not less than 610mm, the total elongation of strand should be not less than 3.5%.

(BS 5896-1980)

Classification			1x7				1x7 Excellent strand:
Nominal Dia.(mm)			15.2	12.5	11.0	9.3	15.7	12.9	11.3	9.6	8.0
Nominal Tensile strength(N/m㎡)			1670	1770	1770	1770	1770	1860	1860	1860	1860
Nominal Section(m㎡)			139	93	71	52	150	100	75	55	38
Nominal mass(g/m)			1090	730	557	408	1180	785	590	432	298
Tolerance		Dia.(mm)	+0.4/-0.2		+0.3/-0.15		+0.4/-0.2		+0.3/-0.15
		Section(m㎡)	For all strands +4%/-2%
		Mass(g/m)	For all strands +4%/-2%
Specified characteristic breaking force kN			232	164	125	92	265	186	139	102	70
Specified characteristic 1% test load kN			197	139	106	78	225	158	118	87	59
1% longation load kN			204	144	110	81	233	163	122	90	61
Minimum elongation at max.load (LO=500mm)			For all strands 3.5%
Constriction at break			For all strands ductile wire breaks visible to the naked eye
Relaxation	Initial Load (% of factual load)		For all strands 60% 70% 80%
	Max.Relaxation after 1000h	I class Relaxation	For all strands 4.5% 8% 12%
	Max.Relaxation after 1000h	II class Relaxation	For all strands 1.0% 2.5% 4.5%

Physical Characteristic of construction 1X19 strand

(Jis G 3536-1999)

Reference	Diameter (mm)	0.2% load of ermanent elongation (kN)	Tensile Force (kN)	Elongation (%)	Relaxation (%)
Reference	Diameter (mm)	0.2% load of ermanent elongation (kN)	Tensile Force (kN)	Elongation (%)	N	L
1X19S	17.8	>330	>387	>3.5	<8.0	<2.5
	19.3	>422	>451	>3.5	<8.0	<2.5
	20.3	>387	>495	>3.5	<8.0	<2.5
	21.8	>495	>573	>3.5	<8.0	<2.5
1x19W	28.6	>807	>949	>3.5	<8.0	<2.5

Note: N indicate normal relaxation L indicate low relaxation

TAG：PC wire PC strand