How fast does fast setting concrete set?

20 to 40 minutes

See further detail related to it here. Just so, how long does quick set concrete take to set?

15 minutes

Similarly, how does fast setting concrete work? Fast Setting Concrete Mix is a preblended fast-setting mixture of special cementitious materials, sand, and coarse aggregate, for projects where a rapid set is needed to allow for same-day use. It can be used for setting posts and poles without mixing or bracing, in addition to working well as a concrete hole filler.

Keeping this in consideration, is fast setting concrete strong?

Fast-setting concrete isn't just simple and fast, it's also durable and strong, reaching 4000 psi — or pounds of force per square inch —after a month. That's stronger than the concrete used for foundations on most homes.

Is it OK if it rains after pouring concrete?

Pouring Concrete vs Pouring Rain. If the rain occurs when the concrete is fresh (about 2-4 hours after mixing), the surface should be protected from the rain. If the finishing process was recently completed, rainwater may not cause damage as long as it is not worked into the surface and the slab is left untouched.