Fig. 1. Extend slump life with use of time-release PCE. The mix is especially prone to rapid slump loss as indicated by the rapid loss with PCE 1. The slump vs. time profile for PCE4 indicates slump build with time. By blending PCE1 with 1 and 2 parts PCE 4, slump retention can be extended to almost two hours. Note how set times only increase by 55 minutes.
Fig. 2. Dose-Slump Response for PCE vs PNS Superplasticizers in Concrete with sand having Methylene Blue value of 1.3.