The use of phosphonic based chemistries as a retarder in concrete are relatively new, however they can offer some specific advantages. Phosphonate based retarders can outperform other acids at higher temperatures, as well as allowing for longer periods of retardation. Set times can be controlled more precisely, as the relationship between dosage rate and retardation is linear. A wide variety of chemistries are available in powder form, for each application ASG can recommend the correct additive or a blend of multiple additives. Phosphonate retarders are the next generation in cement admixture technology. Highly effective for long periods of time, phosphonate retarders are also predictable due to their linear relationship between setting time and dosage rate. There are a range of chemistries available including HEDP, ATMP, PBTC and more.