A System-Level Kinetic Analysis of Cement Hydration, Moisture Transport, HPMC and RDP Interaction 1. Introduction: Open Time as a System Behavior In tile adhesive technology, open time is not a fixed material property, but a time-dependent system behavior influenced by cement hydration, moisture transport, and polymer modification. Among all components, HPMC (Hydroxypropyl Methylcellulose) and RDP […]