预应力混凝土用钢绞线,主要产品规格见下表:

产品名称 规格型号 材质 执行标准
低松驰预应力混凝土用钢绞线 1X3
φ6.20-12.00mm
82B GB/T5224-2003
ASTM416M
1X7
φ9.50-17.80mm
82B GB/T5224-2003
ASTM416M
该产品主要作预应力混凝土结构钢筋用,如大跨度铁路和公路的桥梁\吊车梁\岩土锚固工程,多层工业厂房等.
预应力钢绞线技术要求[Technical Specification GB/T5224-95]
结构
Composition

公称直径
Nominal
diametre


(mm)
截面积
Area of
Section


(mm)
允许偏差
Tolerance



(mm)
强度级别
Tensile
Strength
Grade

(Mpa)
整根钢绞线
的最大符合
Rupture
for whole
of strand
(KN)
屈服负荷
Yielding
Load


(KN)
伸长率
Elongation
(lo=600mm)


(%)
每100m理论重量
Theoretical
Weigth per 1000 metre
(Kg)
1000h松弛率%不大于
Relaxation Value1000 hours no more than
初始负荷为70%公称最大负荷
Initiate loads is 70% of maxmumnominal load
不小于(not less than)
1*2
10.00
12.00
39.5
56.9
+0.30
-0.15
1720
67.9
97.9
57.7
83.2
3.5
310
447
8.0
2.5
1*3
10.80
12.90
59.3
85.4
+0.30
-0.15
102
147
86.7
125
3.5
465
671
8.0
2.5
1*7
标准型
9.50
54.8
+0.30
-0.15
1860
102
138
184
86.6
117
156
3.5
432
8.0
2.5
11.10
74.2
1860
580
12.70
98.7
+0.40
-0.20
1860
774
15.20
139
1720
1860
239
259
203
220
1101


12.70
112
+0.40
-0.20
1860
209
178
3.5
890
8.0
2.5
15.20
165
1860
300
255
3.5
1295
8.0
2.5
美国材料与实验协会标准[ASTMA416-90a]
级别

Grade

公称直径

Nominal
diameter

允许偏差

Tolerance

截面积

Area of
Section

每1000m理论重量
Theoretical
weight per
1000 metre
(Kg)
破断力

Minmum
breaking
load
(KN)

1%伸长最小载荷

Minimum
load at 1 percent extension
(KN)

伸长率

Elongation
不小于
not less
than
(%)

松弛值

Relaxation Value
1000hrs
不大于
Not more than

250
9.35
11.11
12.70
15.24
±0.41
51.61
69.68
92.90
139.35
405
548
730
1094
89.0
120.1
160.1
240.2
80.1
108.1
144.1
216.2
3.5
2.5
3.5
270
9.53
11.11
12.70
15.24
+0.66
-0.15
54.84
74.19
98.71
140.00
432
582
775
1102
102.3
137.9
183.7
260.7
92.1
124.1
165.3
234.6
3.5
2.5
3.5
英国标准[BS5896]
钢绞线
类型
Strand
type
公称直径
Nominal
diameter



(mm)
允许偏差
Tolerance





(mm)
截面积
Area of
section
每1000m
理论重量
Theoretical
Weight per
1000 metre


(kg)
抗拉强度
Tensile
Strength



(Mpa)
规定特性
值断裂截

Specified
characte-
ristic
breaking load
(KN)
规定特性
值0.1%屈
服载荷
Specified
characte
- ristic 0.1% yielding load

(KN)

1%伸厂率时的载荷
load at 1%
Elongation
Lo≥500mm



(KN)
最大载荷
时的最小深长率
Minimem
Elongation
at Max load


(%)
松弛值
Relaxation value
1000h
60%
Initial
load
70%
80%
标准
7丝
Standard
7-wire
9.3
11
12.5
15.2
+0.3
-0.15
-0.3
-0.15
+0.4
-0.2
+0.4
-0.2
52
71
93
139
408
557
730
1090
1770
1770
1770
1670
92
125
164
232
78
106
139
197
81
110
144
204
3.5
3.5
3.5
3.5
1.0
1.0
1.0
1.0
2.5
2.5
2.5
2.5
4.5
4.5
4.5
4.5
超级
7丝
super
7-wire
9.6
11.3
12.9
15.7
+0.3
-0.15
-0.3
-0.15
+0.4
-0.2
+0.4
-0.2
55
75
100
150
432
590
785
1180
1860
1860
1860
1770
102
139
186
265
87
118
158
225
90
122
163
233
3.5
3.5
3.5
3.5
1.0
1.0
1.0
1.0

2.5
2.5
2.5
2.5
4.5
4.5
4.5
4.5
摸拨
7丝
Die-drawn
7-wire
12.7
15.2
18
+0.4
-0.2
+0.4
-0.2
+0.4
-0.2
112
165
223
890
1295
1750
1860
1820
1700
209
300
380
178
255
323
184
264
334
3.5
3.5
3.5
3.5
1.0
1.0
1.0
1.0
2.5
2.5
2.5
2.5
4.5
4.5
4.5
4.5

    后张无粘结预应力筋适用于大跨度、大开间建筑的现浇楼板、大荷载的预制梁及其它特种结构。具有不需预留孔道、不必灌浆、施工简便、节省材料、随便弯曲等特征。
     Post-tensioned unbonded prestressed concrete bar is suitable for cast-in-placeconcrete of long-span and wide buildings,large load prefabricated beam and other construction.I has the charcters of not need room for futture expasion nd grout-in,Convenient use,material savad,bended easy.
名称

Name

项目

Item

单位

Unit

钢丝束

Tendon

钢丝线Strand

低松弛钢绞线

钢材Steel

抗拉强度 Tensile strength

延伸率 Elongation

截面积 Section Area

重量 Weight

弹性模量 Modulus of elasticity

Mpa

%

mm 2

kg/m

Mpa

≥ 1570

≥ 4.0

137.41

1.08

2.0*10

≥ 1470

≥ 3.5

139.98

1.09

1.8*10

≥ 1860

≥ 3.5

140.00

1.10

1.8*10

油脂

塑料

Oil Plastic

防腐油脂重量

Weight of antiseptic oil

高密度聚乙烯炉套厚度

High density polyethylene thickness of coat

G/m

mm

> 50

0.80~1.2

> 50

0.80~1.2

> 50

0.80~1.2

摩擦

试验

Friction test

无粘结预应力筋与壁之间的摩擦系数 u

Friction coefficient of unbounded

prestressed bar and its coat (u)

考虑无粘结预应力筋每米长度局部偏差对摩擦的影响系数 K

Coefficient of octal error effect on friction (per meter) (k)

 

 

 

0.1

 

0.0035

 

 

0.12

 

0.004

 

 

0.12

 

0.004