We are currently investigating the incorporation of interparticle interactions that account for agglomeration of cement particles. For example, by including an approximation to the attractive van der Waals force expected in cementitious systems,5 it is possible to produce a Bingham-like behavior in our suspension. To model the steric hindrance of dense layers, where interpenetration is low before the van der Waals force is counteracted, a cutoff distance is introduced at close separation. While more refined models need to be developed, the results of these preliminary investigations are encouraging. Ultimately, we expect to be able to use conformational data of adsorbed superplasticizers from AFM within such predictions.