Reinforcement can be said to be an important part of building a house, so the choice is particularly important. We need to choose its quality from many aspects. For example, sometimes steel bars may rust. The following small series will introduce you to the problem of rust in building steel bars.

Does it matter if the steel bars rust when building a house?

The influence of corroded steel bars on buildings depends on the corrosion degree of steel bars.

1. Generally speaking, the corrosion of steel bar is only a little floating rust on the surface of steel bar, which does not affect the combination of steel bar and concrete (grip) or the diameter of steel bar, so there is no problem.

A more direct visual inspection is to see whether there is flaky or granular old rust and obvious pits on the surface of steel bars. If not, there is basically no impact.

2. If there is flaky or granular old rust on the steel bar surface, obvious pits may appear at this time. That must have an impact. The size of the impact and whether it can be used should be re-tested, including weight deviation detection and mechanical performance detection. Where it is necessary to test the seismic performance of buildings for seismic fortification, the test results shall prevail.

What should I pay attention to when buying steel bars?

1. The easiest way to identify the quality of steel bars is to identify them by appearance.

Generally speaking, the surface gloss of high-quality steel bars is the same, and it should be dark blue gray without color difference. For example, some inferior steel bars are only gray on the surface, and iron oxide scales will fall off when they are knocked or wiped slightly, and some even appear dark red.

2. There should be no cracks, scars and folds on the surface and cross section of another steel bar.

3. If the cross-sectional dimensions of steel bars produced by regular enterprises are in line with international standards.

The roundness of round steel (the difference between the maximum diameter and the minimum diameter on the cross section of circular metal material) is small, the cross section size of inferior steel bar is less than the lower limit of nominal size, and the roundness mostly exceeds the standard.

4. Measure the diameter with caliper, and then see if the steel bar is round. If the diameter is enough but not round, it is non-standard, and if it is round but not round, it is also non-standard. Whether the steel bar surface is smooth, unsmooth and burr is also non-standard.

5, weighing, cutting a meter long steel bar, this time can be weighed with an electronic scale, diameter × diameter× 0.00617 is the weight per meter (unit kilogram), and the steel bar has a number of diameters.

Summary: That's all about the rust of steel bars in building houses. This also depends on the situation. If it is not serious, it will not be affected.