Traditional floor screed basically consists of a 4:1 sand & cement mix. Traditional screed drying times vary according to the weather conditions, depth and manufacturers admixtures used.
There are three main systems for traditional floor Screeding, Fully bonded, Partially bonded, and Floating
Fully bonded screeds need to be laid on a shot-blasted concrete base, and be bonded using an adhesive such as PVA, SBR, epoxy resin or cement
Partially bonded screeds are a cheap alternative to doing the job properly.
Floating Screeds are laid on insulation to provide an insulated floor area.