Set retarders for concrete are products that slow down the cement hydrating cycle in the first stage after mixing. These products can extend casting times and help to prevent concrete from hardening during transportation, especially in warm climates when setting times are much shorter.
Set retarding phosphonates
Bozzetto’s set retarders belong to the chemical family of phosphonates, polyphosphonic derivatives having different molecular structures and weights. Some of them simply act as retarding agents whereas others also have a dispersing action. Set retarders can be mixed with other additives, particularly superplasticizers and set accelerators. Available in the range of liquid, powder/granule products.