The lower the concrete grade, the higher its water absorption.

The lower the concrete grade, the higher its water absorption. This is due to the increased number of pores that allow moisture to penetrate. As a rule, foundation blocks are made of grade M150 concrete. During prolonged rainy weather, they absorb moisture up to 10% of their weight or even more. Such concrete is very easy to cut with diamond tools. However, the lifespan of the blades when cutting this type of concrete is reduced by 2–3 times.