how is cement prepaed? what are the uses and different types of cement?
I've been in exactly the same situation. We live on the edge of nowhere and can't get delivered concrete. We poured our greenhouse floor, using Portland premix cement and a mixer. Our mixer is slightly smaller than yours. We used extra water in the mix so it would stay workable longer. Bad idea! The floor did fine until the first winter. It then split, chipped cracked and, well, you get the picture. We ended up redoing it. The second time we divided the floor into three sections. Each section had its own small 3/8 rebar web placed 2 above ground in a 4 floor. We supported the web by driving 10 pieces of 3/8 rebar into the ground and wire to hold the web to them. Lastly, on the sides where the adjoining sections would go, we used 1 x 6 pieces of redwood. We drilled them and ran rebar through to the web – leaving 2' sticking out for attaching the new sections. That piece sticking out was attached to the next section's rebar web. It has been there for several years now, and has no cracks at all. Our temperatures range from 105°F in summer to -40°F in winter. I put a link in to show how to determine how many cubic yards of concrete you'll need. Good luck!
