Concrete driveway falling apart
Hi,
We poured a concrete driveway about 1 1/2 years ago, and it's got pits all over the surface (about 1/8", and when you walk on it the concrete just dissolves into sand or comes off in large flakes that are sometimes as large as 2"x3". We noticed a small amount of pitting last summer, but not extensive, and now as winter is winding down, the entire slab (about 1,400 square feet) is all pitted and/or flaking. Can you tell me what would cause this and can we fix it? I have a friend who says he thinks it is a bad batch of concrete, is this possible, and would it be normal to take 1 1/2 years to show up?
Thanks for your input,
Stacey