In construction projects, various types of steel bars are often used, among which hand-pulled steel bars and compression steel bars are more common, so what are the differences between the two? Let’s look at the distinction between tension and compression steel in a moment.
First, how to distinguish between tension reinforcement and compression reinforcement
Because the upper reinforcement will be affected by pressure, the lower reinforcement will be affected by tension, the distinction is very simple, the general beam reinforcement is the use of compression reinforcement above, the use of tension reinforcement below. However, because the compression and tension fields of the beam under different load combination effects are not the same, for example, the area of the support is just the opposite, the upper part of the support is the tensile steel bar, and the lower part is the steel bar pressure. The actual judgment should be based on the specific situation.
Second, what is the meaning of stress reinforcement
The bearing steel bar is to extend the structure of the concrete and join the reinforcement, mainly play the role of bearing the pressure, usually the bearing steel bar on the beam will be placed in the lower layer, and because of its thick section, can be used to bear the main pressure of the building, according to the different types of reinforcement need to be configured according to the actual needs of the building to buy.
Third, how to distinguish between good and bad reinforcement
1, appearance discrimination: the surface gloss of high-quality steel bars is consistent, and is dark blue-gray, no color difference, some inferior steel bars are gray on the surface, and some are even dark red, and will fall off after slightly tapping or wiping.
2, high-quality steel bar surface and cross-section can not appear cracks, scars and folding.
3, the regular enterprise production of steel bar section size should meet international standards, inferior steel bar section size should not be less than the nominal size of the lower limit, roundness is mostly larger than the standard;
4, you can use the caliper card diameter, see whether the steel bar is round, if the diameter is enough but not round or the diameter is not enough, it is a non-standard product. Then touch to see whether the surface of the rebar is smooth, there are no burrs, if not smooth, it is also a non-standard product.
