ᐅ Flushing joints – paved courtyard and driveway

Hello.
We have a significant slope in front of the house. Over roughly 7 meters (23 feet) it’s quite gentle, and over the last 3 meters (10 feet) it gets steeper to reach the street. The slope is about 30cm per meter (12 inches per foot). The paving stone is approximately 40 x 20 cm (16 x 8 inches). I have already swept and brushed the joints multiple times, but unfortunately, regular sieved sand doesn’t work.

What would you recommend, based on your experience?
We don’t want dark mortar joints, and ideally, I only want to stabilize the front area. The joint color should match the rest as closely as possible. Liquid joint stabilizers never seem to be suitable for driveable areas. Pure sand in 20 kg (44 lb) bags with slight adhesive additives or similar doesn’t seem to last, does it?

Basically, quartz sand is usually used. However, with wider joint widths, it tends to wash out. That's why joint stabilizer is applied. You’re not driving on the joints but on the stones themselves, so the situation should improve significantly compared to now.

I personally have quite wide joints and also a steep driveway. I use very fine decorative gravel (although black). Still, some of it washes away during heavy rain from time to time. That’s just how it is.

Regular sand is generally not used. Instead, joint sand or stone sand (quartz sand) is used, which sets relatively quickly and becomes firm, preventing further movement.