When should you go in for a joint that will provide for the expansion of your concrete? Even the best builder and architect will tell you that it is impossible to predict how your concrete structure is going to behave to the last point. There always is some unpredictability involved.
What if the moisture and the rot start from beneath? The point where the concrete is in contact with the ground may be very wet and moist due to the water table. This is obviously going to have an impact. If the moisture enters the concrete from the base and if it climbs up, there is very little you can do.
Of course, such disastrous and dangerous instances do not occur very often. Hence, it is better to err on the side of caution and take precautions in such a manner that your structure is safe even under the worst circumstances. This obviously means that you cannot skip the concrete joint at all.
You will have to opt for the same and make use of it. Secondly, you cannot afford to be stingy in this affair. You will have to use the best quality material to make sure that the pressure is absorbed and released without any difficulty. Thirdly, you should follow certain thumb rules when you are dealing with concrete structures.
Firstly, a long slab is always going to require joints irrespective of whether you feel it is necessary or not. The last thing you want is for the slab to begin cracking because you underestimated or misjudged the extent of expansion that will take place.
Secondly, you should keep in mind that the movement and expansion of concrete is never a zero sum affair. The concrete contract after it has been poured. Then, it shall expand when it is heated. Then, it shall contract when it becomes cold again.
You think that the concrete is immobile and is stagnant at all times is a very big mistake. This means that the material will have to be as versatile as a concrete itself. Further, the joint will obviously require repair and maintenance on a regular basis. Considering all these points, you should choose the contraction joint and the expansion joint.
There is a possibility of interlinking of the joints depending on the positioning of the concrete with respect to other structures. The fault line that has been generated purposefully to ensure that cracks are created on a particular spot may mix with your expansion joint. Make sure you know what you are doing and make sure you do not implement any amateurish effort without being aware of the consequences.
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