Can no mix quikrete be used to make a patio?

No. It's great for setting posts. The blend of concrete is different for patios/slabs.

https://www.homedepot.com/c/how_to_mix_concrete_HT_BG_BM

The no-mix is for setting fence posts.

Checked the Quikrete site and for 100 square feet 4" thick you will need 50 80 pound bags of concrete mix. Stated 60 minutes working time once you mix the water in. This is not a job that you should attempt even with a lot of help.

Many redi-mix concrete companies have trucks that mix concrete on-site. You will need less than 2 yards and most companies that have those trucks will deliver the smaller amounts.

You will also need concrete finishing skills, trowels, hoe, and a bull float. If this is your first concrete job, hire someone. If you cannot afford to hire someone, this is not a job for you to tackle alone.

My husband is making a small pad for his tool shed... we have a cement mixer (you can rent one and you can rent the tools to work it too) that holds up to 12 bags of prepared concrete at one time... He has worked industrial construction in the past... so he has lots of experience pouring concrete.... he says: Work in 3 foot by 3 foot sections... that is as large as one person can handle, alone. Do at least one practice section.. in an area where it won't matter (like a pad to set the trash cans on) Use 2X4 lumber as frame... HE is pouring in a "checker board" type pattern... where he pours square # 1 and #3 then goes back and does #2 after the first two have set up completely... (using 2x4s to join the 2 squares (you will need stakes to hold them in place) And he also suggests you use re-bar or a heavy wire screen to help hold the sections together. He has found that a 3 ft X 3 ft section takes 7 bags (60 lb) of Quickrete ... don't use the fast setting one in the red bag... YOU will want the extra time to work the mixture.... we have to use the slower setting mix... because we are in Arizona and the dry air and heat make it set up faster.

FYI..he is 68... and does it all by himself.

NOTE: for the frame he has used metal "L" brackets, ones that go on the outside of the corner to hold the corners together... he made 2 different frames one is a square (3 ft X 3 ft) and one is an "H" shape to use when he pours the "joiner" square (square #2)... the "L" brackets allow him to take the form apart to remove it if needed. He lets the concrete sit over night before removing the forms.

IMPORTANT... paint the wood with MOTOR OIL so the concrete will not stick to the wood

I would not suggest the use quikrete, because it may not be mixed thick enough. Aguy I know did that to his carport to add a room and the quikrete ended up cracking. He had to bust it up and called a cement company to re do it. Save your money and do it right the first time. Good luck.

The patio is more than just a seating area in the yard. This is a whole philosophy of having a pleasant time outdoors, with a very long history. Sometimes patios are called terraces and verandas, but this is a slightly different option, although, of course, there are common features. The terrace and veranda are always adjacent to the house, becoming its continuation, simply unheated. The patio can be made as a separate patio and to build this area you need to pave the path with stones or make wooden circles inside the decoration, as if you have a Japanese garden. Do you understand what I mean? There are decorative paths and ready-made architectural solutions can be put on them. I made decor out of epoxy resin and then put eco-film on it so that the weeds would not grow. I put garden furniture on top, you can find more about Patio Sectional if you want to choose something specific for yourself.