Construction road: Use of grass grid stones? (or alternatives)

Hello everyone,

we are currently quite advanced in the construction planning/approval phase, building a single-family house in the rear part of a plot (56x18m). At the back, because in the front area existing buildings such as garages, outbuildings, and building windows make it necessary.
This would mean that we have to build a construction road about 35m long on strongly clayey soil, which we would then dismantle again afterwards (we want to use the garden and not have a road).
Currently, about €20,000 is budgeted for earthworks and gravel as well as its disposal, just for the construction road!
And I think to myself, it must be possible to do it cheaper.

My idea is to lay the driving tracks and the crane parking space at the back myself with concrete grass grid stones. The stones could be given away over time after the construction is finished and dismantled if necessary, and I would have no disposal costs.
I would lay the stones (600x400x100) with the 600mm width per track.
I would compact the clay soil and excavate the depth for the stones beforehand.
This should be significantly cheaper overall, around €2000.

My question is whether you know someone who has already done this?
Or of course what you think of the idea. Or also, what construction companies usually think about this implementation.
Since the path will be dismantled again at the end of the construction project, it does not personally matter to me if the stones stand crooked or partially sink over time. Or if I have to take the stones out in places to reset them. Construction vehicles should be able to pass over without getting stuck, nothing more.

Thanks in advance for your answers and assessments/experiences.
Best regards
Thomas

Even for grass pavers, you need a stable base, especially if heavy trucks will be driving over them. So you won’t be able to avoid using crushed stone. But in my opinion, there is no reason to dispose of it afterwards. When the construction company is finished, I plan to move my crushed stone under the terrace with the mini excavator and use it as a base for the footpaths. You will probably also need a driveway up to the house, or do you want to carry all your groceries, the new washing machine, vacation suitcases, etc., 35 meters to the car?

You also need a load-bearing substructure for grass pavers, especially if heavy trucks will be driving over them. So you won't avoid using gravel.

But in my opinion, there is no reason to dispose of it afterwards. When the construction company is finished, I plan to spread my gravel under the terrace with the mini excavator and use it as a base for the footpaths. You will probably also need a driveway up to the house, or do you want to carry all groceries, the new washing machine, vacation suitcases, etc., 35 meters to the car?

100% agreement. Otherwise, after one truck trip to the construction site and back, he suddenly has twice as many grass pavers because the truck turns each one into two. ;)

You can also take the cheap mineral mix. I paid 9.10€ (net) per ton last year. Always order full dump trucks, it's cheaper. I used it for the driveway (not officially frost-proof). 35m x 3.5m x 0.25m roughly 30m3, so you need at least 35 m3. So just under 60 t for 700€. You can then spread it by hand or with a wheel loader. Even if lawn grid stones would work (I rather think they will break) I can pull them out of dry clay if they're 30 cm in the ground. I'd rather use about 80% of the existing mineral mix with the wheel loader for driveway and terrace, set lawn edging, garden house etc. or how do you want to get to your house in the future?

The excavator that came to us before a truck applied fastening material in the driveway sank loosely about 20 cm. It would have broken all the grass grid stones into several pieces or dug under them. I therefore do not think that can work.

The excavator that came to us before a truck delivered fastening material on the driveway dug itself in by a good 20 cm without any problem.

You mean something like this? Damp clay soil with superficial frost.