Which material should I use for the driveway?

Hello Marcel,

Quartzites are also very pressure-resistant and are a wear-resistant material. Choose a cheap regional supplier here. Then you calculate both types and can decide which is better. For the substructure, it doesn’t make much difference. In my opinion, the decision that has to be made is purely a matter of money.

For both, have the sieve curve given, i.e., among other things, how much fine material is included. The fine material (grain diameter < 0.063 mm) should not exceed 5 wt.-%, otherwise the water permeability is too low. This is a general value; the technical specifications of the paving manufacturer may specify something different. For RCL, the amount of brick chippings should also be low, because bricks act capillary – even in a crushed state.

A chipping without fine material – as offered to you with 2/5 – is highly permeable, but less compactable. Such a thing is also called "Ecological installation". In my opinion, this could only be considered if the substructure were poorly permeable. With 80 - 100 cm mineral mixture / RCL this should work, because with the prescribed slope, only a fraction of the rainwater hitting the joints seeps away.

Which pavement do you want to lay? What does the manufacturer specify for bedding and joints?

Best regards

Hello,

Thank you very much for your great answer. I will first familiarize myself with the information and cannot make a decision yet. The question of the surface covering is also still open. But your advice is very valuable to me.

BG

The topic of frost protection is always a special issue. I know craftsmen and construction companies who swear that it is all nonsense. However, the frost protection is pointed out in the manufacturers' technical regulations. This is often where savings are made, and after the winter, people look at how the paved area looks. In the past, fieldstones were placed directly on the topsoil. Today, of course, there is a different load.

Hello Marcel,

I am glad if I can help you. The issue with frost protection always depends on the region. However, I take it seriously, otherwise a lot of work would have been done for nothing. For me, the substructure is extremely important. But everyone has to decide that for themselves.

Best regards

Hello,

Thank you for your reply. So we have now found a good regional supplier. The question of frost protection naturally also arises. I am not sure if I will implement it that way. So far, I have the 20 cm base layer in mind. The other option then becomes really expensive.

Regards

Hello Marcel, Of course, if you take the frost protection into account, then that is already a price difference. But especially with the recent excavations, I have found quite a bit, such as brick chippings and construction site debris. What comes to light there is really awful. Roots are often involved as well. It is also important to incorporate the slope in the substructure. Well then, have fun at work.