Powder Solutions Concrete Admixtures
UKCP Rapid Set is a highly active, rapid set, high early strength cement additive for Portland cement systems. It accelerates precast and ready mixed concrete and activates GGBS, allowing 75% cement replacement without compromising early strength development.
UKCP Rapid Set is a highly active, early strength enhancing additive designed for use in Portland cement systems. It is based on a novel, synergist blend of inorganic ultra-rapid set accelerators, and it provides reduced set times and extremely high early strengths when used as an additive in OPC systems.
It is supplied as an off white, free flowing powder.
UKCP Rapid Set has been designed as a potent accelerator where rapid set times and high early strength are needed:
GGBS (ground granulated blast furnace slag) is a by-product of iron making that is widely used as a partial replacement for Portland cement. High amounts of GGBS tend to slow down set times and delay early age strength development, which can cause issues with demoulding and handling within 24 hours of casting.
Used as an activator combined with Portland cement, UKCP Rapid Set allows GGBS to be used at 75% cement replacement without compromising early strength development. Typically, it is used at 5% of total binder content along with 10% OPC and 75% GGBS. Dosage levels can be adjusted to provide the properties you need.
Dosage depends on the set times and early strength you need. Typical dosage rates are:
| Application | Typical dose |
|---|---|
| Precast concrete | 1 to 5% on cement weight |
| Ultra high early strength precast | 10% cement replacement |
| GGBS activator | 5% on total binder weight |
UKCP Rapid Set provides very rapid set times at 20°C. Set times can be controlled by adding retarders to give optimum performance.
These figures are typical only. Confirm the dose for your materials and production cycle with trials, and speak to our technical support team for full guidance.
Refer to the UKCP Rapid Set Safety Data Sheet, available on request, for full instructions. Wear suitable PPE, including gloves and goggles, when handling.
UKCP Rapid Set is supplied in 20kg bags and 1000kg bulk bags. Store it in dry conditions and avoid contact with water. When stored correctly, it has a shelf life of 12 months from date of manufacture.
For semi-dry precast units with high GGBS contents, such as blocks and bricks, also look at Xpress. For rapid set Postmix, see Accelerator A.
Planning a trial in precast or ready mixed concrete? Talk to our technical support team, or request a sample of UKCP Rapid Set.
Common questions about UKCP Rapid Set. For project specific advice, contact our technical team.
Powder Precast Admixtures
Xpress is an early strength activator for precast concrete based on CEMI and GGBS binder systems. It boosts early age strengths where at least 50% GGBS is used, improving handling and reducing breakages in semi-dry units such as blocks and bricks.
View product
Powder Postmix and Grout Additives
Accelerator A is a rapid set, high early strength cement additive for Postmix. Based on a blend of inorganic ultra-rapid set accelerators, it gives set times from 5 minutes at 20°C and very high early strengths in Portland cement systems.
View product
Liquid Concrete Admixtures
SP10 is a mid range water reducing superplasticiser liquid based on polycarboxylate technology. It gives water reduction of more than 10%, helps prevent bleeding and segregation, and is an economic plasticiser for readymix concrete and screeds.
View productFurther reading from the UKCP team, starting with guidance on UKCP Rapid Set.
Product News
LSA Max is UKCP's liquid admixture for semi-dry screeds, developed to deliver very rapid drying, high early strength and foot traffic after 24 hours.
Read more
Industry Insight
A screed admixture changes how a sand and cement screed mixes, finishes, gains strength and dries. This guide explains how to match the right admixture to your project.
Read more
Company News
UKCP develops bespoke black box additive packages in powder or liquid form, built around the raw materials already used on a manufacturer's own production site.
Read moreOur team is here to help you choose the perfect product for your project.
