Sintering is part of the firing process used in the manufacture of pottery and other ceramic objects. 1  These objects are made from substances such as glass, alumina, zirconia, silica, magnesia, lime, beryllium oxide, and ferric oxide.
for our foundation, the footings were poured one day and the walls poured the next day. I think that is pretty standard. It is true that concrete takes 28 days to fully cure. 1 Like Bookmark January 20, 2010 at 12:44PM.
Re: Poured side walk/steps, how long to leave forms? Concrete takes about 28 days to cure to a maximum degree. It does continue to cure for many years longer but the 1st 28 days is the most critical period. It is very important to keep the new cement from drying during that period.