It was not always built specifically. Years ago, other materials were used for housing construction. However, the search for builders was always to find a highly resistant material. Thus they found the concrete that today is one of the favorites.
Today we can see concrete as a structural part of different works, both in civil and industrial constructions. One of the most prominent properties of concrete is its resistance to understanding, but what does this mean, and how can you verify that the concrete is. In this post, we tell you more about it.
What is resistance to understanding?
It is the maximum effort that a material can withstand the crushing load. The resistance to understanding is measured, taking into account the maximum amount of effort that is necessary to deform a material. The formula for calculating the resistance to understanding is the division of the maximum load between the original transverse areas of a test piece in an axial compression test.
How do you verify the resistance to understanding concrete?
The engineers of the work specified in the plans the resistance that the concrete is must-have. But in practice, this does not always follow these indications, and it is for which the information should be verified to ensure the quality of the material. This will ensure the safety of the structure.
There is a standard for verifying the strength of concrete, and it is the Standard for Reinforced Concrete E-060. According to the standard, this procedure is followed to measure the resistance to the understanding of a sample that will then be compared with what is indicated in the structural drawings of the work.
Why do a verification of resistance to understanding?
It is possible that the first years after the compression, the effects of a verification error are not noticed, but there will be future consequences on the structure. On the other hand, if the verification is done and this gives a positive result, it is guaranteed:
- The good quality of concrete.
- That the workmaster respects the indications of the plans.
- The good behavior of the structures before seismic movements.
Can you use seawater?
You can only use seawater in the preparation of concrete if you have the authorization of the project engineer and supervision. You should not use it in the following cases:
- Concrete reinforced and prestressed.
- Concrete with resistances greater than 17 MPa at 28 days.
- Concrete with embedded elements of galvanized iron or aluminum.
- Concrete with a surface finish of importance.
You will not use in the curing of the concrete or in the washing of the equipment, those waters that do not meet the above requirements.
Mixing water for prestressed concrete or concrete containing embedded aluminum elements, including the part of the mixing water with which the free moisture from the aggregates contributes, must not contain harmful amounts of chloride ions.