There aren't many reasons to have a concrete surface that's only 1 inch thick. It's too thin to use as a floor alone; however, if you need to coat damaged concrete, a 1-inch layer is a good amount. The old surface is prepared for the new concrete to adhere, then the new cement is added. Concrete can be strong and durable, but only if it is thick enough.
Are you pouring a concrete slab for a DIY shed or patio floor? This is the most common application for DIY concrete pouring. Make sure you don't make your slab thinner than four inches for any application. Six inches is the minimum thickness for a concrete slab that can withstand any type of heavy vehicle traffic. The minimum thickness for pouring concrete onto concrete is 1.5 inches.
In most cases, I don't like pouring new concrete less than 2 inches thick. The coverage mix you mentioned is OK. The day before laying the concrete, moisten the surface and keep it moist until you place concrete, but there is no standing water on the slab during laying. Use a 50% mixture of Portland cement and sand and make a paste out of it.
You can use a 50% mixture of water and latex bonding agent (such as Acryl 60) to make the suspension. Clean or sweep existing floor grout just before concrete placement with a stiff broom. The grout should not dry out before laying concrete on it. And remember, if your new concrete pour is less than 3 inches thick, you'll want to BOND the new concrete to the old concrete with a bonding agent.
I would suggest gfrc (fiberglass reinforced concrete), but I would still expect the concrete to be quite brittle if it is only one inch tall. If you don't do everything you can to avoid it, you may be replacing the concrete sooner than you'd like. If you ripped out old concrete and replaced it with new, well-poured concrete, you could save yourself a lot of trouble by maximizing the life of your concrete. Similarly, if you pour concrete on a slope, you are sure to use a larger slab thickness at the bottom of the slope.
I'm trying to make a thin concrete slab (1 inch thick), however, most concrete mixes I've seen online say it's for a minimum thickness of 2 inches. For example, if your patio is going to hold a heavy hot tub, hot tub, or outdoor kitchen, you might want to pour the thicker concrete in those places. Nobody wants a concrete project to crack, but don't rely on the type of standard welded wire mesh normally used for concrete reinforcement. The ideal is to finish the concrete when the surface water has dried, but the concrete is still soft and workable.
You should be able to form concrete into a pile four inches in diameter and four inches high if mixed properly. Once you've determined that you can pour new concrete over old concrete, here's how to prepare old concrete. You may think you know a little bit about concrete and how it works, but there is a lot to consider before making this decision. I suggest using a mold (also known as making a 9 x 9 x1 box, as waterproof as you can make it, that you can easily disassemble once the concrete has hardened), and coating all sides with a very light layer of transparent oil (like baby oil, I've even used olive oil in a hurry).
You may need to ask some helpers for help with the process of laying the new concrete and its stamping. In addition to that, you need to consider the ability of the concrete slab to resist cracking and breakage. In addition, two weeks after pouring, use a masonry saw to make cuts to a third of the thickness of the concrete slab. .