The original part of my house is approx. 90 years old and has a stone foundation that rests on sand (?!). A few years back I had to re-point a small section - no problem. Now, another section is looking really bad. Some of the stones are actually letting go and voids are opening up. My guess is the record rain we have had recently has softened the ground beneath this part of the stonework. Where I live there seems to be no contractor willing to come and look at it, except one who says I should just re-point it, but only to use mortar containing lime. Local building supply stores say there is no such thing. The area in question is approx. 3' x 9'. Ideas/recommendations?

On the property here we have a driveway that goes over a culvert and into the yard. It was concreted long before I came out here and the first 1/4 of it has just been falling apart over the decades. We recently just got nailed by hurricane harvey and the driveway/yard literally became a river for 3 days. This has caused quite a bit of errosion and now there are a bunch of even deeper potholes full of broken concrete etc. The first 1/4 of the driveway Its is basically a mixture of dirt, broken concrete, grass, etc. My goal isnt cosmetic. It doesnt look bad, its just a rough riding coming in and out. I'm trying to figure out the best way to fill the potholes and level it all out for a smoother ride. Dirt will smooth it out, but will in time erode away and becomes muddy when it rains. I feel like quikrete would crack and break over time and i'll be back at square 1. But I know my options are limited as long as im only wanting to patch the problem. is there some gravel/dirt mixture that wont get muddy when wet and can withstand errosion? I keep falling back to quikrete as the only real option ​​