I had a replacement driveway poured recently. The main section is 5
inches of 6.5 bag concrete with fiber and wire mesh, poured 4 days
ago. The ticket noted a 4 inch slump. Temperatures since then have
been highs around 70 and lows around 50, with 50 percent humidity and
mostly cloudy. The sidewalk and easement are 6 inches thick with no
reinforcement, as per city code, poured yesterday with a 3.5 inch
slump. Yesterday was also cloudy in the 70s, and in the 50s
overnight. Both have full air entrainment as we do get road salt from
Chicago area winters. The base should be well compacted from 25 years
of a previous driveway, plus the added gravel and prep they did before
On a previous driveway at another house, I had been told to keep it
wet for at least a few days to improve the strength of the driveway,
especially at the surface. I was also told there are curing compounds
that could be used instead. The contractor said neither was really
necessary this time given the relatively low temperatures.
Is this good advice? Should I be doing anything at this point or is
it too late to bother?
Temperatures are going to be highs in the 80s and lows in the 60s this
week with somewhat higher humidity and mostly sunny. The contractor
is supposed to apply some type of concrete sealer, presumably when
they come to remove the forms later this week.
Any information greatly appreciated. I'd like to keep the surface
looking as good as possible for many years, especially given the cold
winters, freeze/thaw cycles and road salt used on the street that will
invariably come onto the driveway. Keeping it constantly wet is not
possible due to city watering codes, though I am permitted to keep it
wet for a few hours in the morning and evening for the first week if
that would help at this point.
Finally, I know cracks will appear at some point. Should they be
filled or sealed somehow, or just left alone? I assume some of the
cracks will appear in the control joints. Should those joints also be
sealed or filled at some point to keep water and salt from getting
into the slab?