圆钢 |
实测值直径 |
钢筋原材执行标准:GB1499.1-2008光圆钢筋直径偏差公称?6-12允许±0.3mm,?14-22允许±0.4mm,不圆度≤0.4mm |
光圆钢筋的直径允许偏差和不圆度规定 |
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公称直径/mm |
允许偏差/mm |
不圆度/mm |
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6(6.5) |
±0.3 |
≤0.4 |
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8 |
||||||||
10 |
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12 |
||||||||
14 |
±0.4 |
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16 |
||||||||
18 |
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20 |
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22 |
螺纹钢 |
实测值直径 |
每批次同一牌号随机抽取10根,每根钢筋随机选取2个部位进行直径测量,每根钢筋平均值作为1个实测点,现场直径不同时每种规格抽取2个测点,如出现不合格值时进行同规格加抽10根进行检测,仍存在不合格值时则判定为此材料不合格。钢筋原材执行标准:GB1499.2-2007 |
带肋钢筋检查 单位:mm |
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公称直径 |
内径d |
横肋高h |
纵肋高h2(不大于) |
横肋宽b |
纵肋宽d |
间距l |
横肋末端最大间隙(公称周长的10%弦长) |
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公称尺寸 |
允许偏差 |
公称尺寸 |
允许偏差 |
公称尺寸 |
允许偏差 |
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6.0 |
5.8 |
±0.3 |
0.6 |
±0.3 |
0.8 |
0.4 |
1.0 |
4.0 |
±0.5 |
1.8 |
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8.0 |
7.7 |
±0.4 |
0.8 |
﹢0.4 |
1.1 |
0.5 |
1.5 |
5.5 |
2.5 |
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10.0 |
9.6 |
1.0 |
±0.4 |
1.3 |
0.6 |
1.5 |
7.0 |
3.1 |
|||||
12.0 |
11.5 |
1.2 |
﹢0.4 |
1.6 |
0.7 |
1.5 |
8.0 |
3.7 |
|||||
14.0 |
13.4 |
±0.4 |
1.4 |
1.8 |
0.8 |
1.8 |
9.0 |
4.3 |
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16.0 |
15.4 |
1.5 |
1.9 |
0.9 |
1.8 |
10.0 |
5.0 |
||||||
18.0 |
17.3 |
1.6 |
±0.5 |
2.0 |
1.0 |
2.0 |
10.0 |
5.6 |
|||||
20.0 |
19.3 |
±0.5 |
1.7 |
2.1 |
1.2 |
2.0 |
10.0 |
±0.8 |
6.2 |
||||
22.0 |
21.3 |
1.9 |
±0.6 |
2.4 |
1.3 |
2.5 |
10.5 |
6.8 |
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25.0 |
24.2 |
2.1 |
2.6 |
1.5 |
2.5 |
12.5 |
7.7 |
||||||
28.0 |
27.2 |
±0.6 |
2.2 |
2.7 |
1.7 |
3.0 |
12.5 |
±1 |
8.6 |
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32.0 |
31.0 |
2.4 |
﹢0.8 |
3.0 |
1.9 |
3.0 |
14.0 |
9.9 |
|||||
36.0 |
35.0 |
2.6 |
﹢1 |
3.2 |
2.1 |
3.5 |
15.0 |
11.1 |
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40.0 |
38.7 |
±0.7 |
2.9 |
±1.1 |
3.5 |
2.2 |
3.5 |
15.0 |
12.4 |
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50.0 |
48.5 |
±0.8 |
3.2 |
±1.2 |
3.8 |
2.5 |
4.0 |
16.0 |
15.5 |
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注1:纵肋斜角θ为0°~30°。 |

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