(1)檢驗方法:上述化學成分檢驗分析常用的標準檢驗方法為:GB/T223, JISG1211?1215、BS1837、BS手冊19等。
(1) Inspection methods: The commonly used standard methods for chemical composition analysis are GB/T 223, JISG1211?1215, BS1837, BS Manual 19, etc.
(2)成分指數(shù):鋼筋成分含量的評價指標主要包括C、Mn、P、S、Si等，各、含量不同
(2) Composition index: The evaluation index of steel bar composition content mainly includes C, Mn, P, S, Si, etc. Each brand and content is different.
一般范圍為C (0.10 ~ 0.40%)， Mn < 1.80%， P < 0.050%， S < 0.050%， Si(0.60 ~ 1.00%)。
The general range is C (0.10-0.40%), Mn < 1.80%, P < 0.050%, S < 0.050%, Si (0.60-1.00%).
表面質(zhì)量
surface quality
鋼筋表面不得有裂紋、疤痕和褶皺。
No cracks, scars or wrinkles shall be found on the surface of steel bars.
鋼筋表面應(yīng)允許有凸塊，但不得超過橫向肋的高度。鋼筋表面其他缺陷的深度和高度不得超過鋼筋位置尺寸的允許偏差。
Bumps shall be allowed on the surface of the reinforcement, but shall not exceed the height of the transverse ribs. The depth and height of other defects on the surface of reinforcing bars shall not exceed the allowable deviation of the position and size of reinforcing bars.
尺寸、形狀、重量和公差
Size, shape, weight and tolerance
1)公稱直徑范圍和直徑
1) nominal diameter range and recommended diameter
鋼筋標稱直徑范圍為6 ~ 50mm。標準的鋼筋公稱直徑為6、8、10、12、16、20、25、32、40、50mm。
The nominal diameter of reinforcing bar ranges from 6 to 50 mm. The nominal diameter of steel bar recommended by the standard is 6, 8, 10, 12, 16, 20, 25, 32, 40 and 50 mm.
2)肋筋表面形狀和尺寸允許偏差
2) Allowable deviation of rib surface shape and size
原肋設(shè)計加肋加固
Reinforcement of original rib design
應(yīng)滿足以下要求:
The following requirements should be met:
橫筋與鋼筋軸線的夾角不得小于45°。當角度不大于70°時，鋼筋對側(cè)的橫筋方向應(yīng)相反。
The angle between the bar and the axis of the bar shall not be less than 45 degrees. When the angle is not more than 70 degrees, the opposite direction of the transverse reinforcement should be opposite.
橫筋的標稱間距l(xiāng)不應(yīng)大于鋼筋標稱直徑的0.7倍。
The nominal spacing of transverse bars should not be greater than 0.7 times the nominal diameter of reinforcing bars.
橫向肋側(cè)與鋼筋表面夾角不得小于45°。
The angle between the transverse rib side and the surface of the steel bar shall not be less than 45 degrees.
鋼筋相鄰兩側(cè)上橫筋兩端間隙之和(包括縱筋寬度)不得大于鋼筋標稱周長的20%;
The sum of the gaps between the two ends of the upper transverse reinforcement on the adjacent sides of the reinforcing bar (including the width of the longitudinal reinforcement) shall not be greater than 20% of the nominal circumference of the reinforcing bar.
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