Important detail during the construction of foundations are, for example, continuous footings what remarkably often are exposed to unfavorable weather conditions. It is on them that the building and consequently essential, that they would be extremely durable, otherwise break the concrete, which is here simply unacceptable.
There is however a method what allows, namely used concrete admixtures, good measures which prevent cracking, plasticizing concrete, making it simply more durable - see concrete related help on domain wall concrete calculator. In addition to admixtures uses also other supporting measures, for example foundation nets or their extremely decent replacement, i.e. concrete fibers which have exactly the same application but the nets much are more difficult to assemble. However, when it comes to fibers, the matter is much simpler and thanks to them acceptable is appropriate concrete reinforcement defined repeatedly as a micro-reinforcement of concrete whose is also preventing cracks.