The core function of a concrete bonding agent is to create a rough "key" between the old substrate and the following plaster or repair layer. This increases contact area and mechanical interlock. In practice, however, low keying strength is a frequent problem. The key coat is loose, bonds poorly, or powders off with a light
Thin repair mortar is typically applied at a thickness of just 3 to 10 millimeters. This narrow range imposes extreme demands. It must bond firmly to the old substrate to prevent debonding, yet stay flexible enough to absorb shrinkage stress and temperature movement without cracking. One property often comes at the expense of the other.
“RDP is too expensive – can we use more cellulose ether instead?” This is one of the most frequently asked questions among mortar formulators. Redispersible polymer powder (RDP) typically costs several times, or even more than ten times, the price of cellulose ether. With ever‑increasing cost pressures, using modified cellulose ether to partially replace RDP
In external thermal insulation composite systems (ETICS), the bond between EPS boards and the adhesive mortar directly determines the system's safety and long‑term durability. Yet, failures like hollowing and detachment still occur far too often. The root cause? It’s the difficulty of forming a lasting, strong adhesive layer at the interface. The combination of Hydroxypropyl
Debonding in Exterior Insulation and Finishing Systems (EIFS) is more than an energy efficiency issue—it is a direct safety hazard. Often, people blame substrate failure or poor workmanship. Yet, from a formulation perspective, two material flaws stand out: insufficient bond strength and sagging during application. Together, they cause hollow spots and eventual delamination. The classic
In the construction materials sector, cellulose ether is hailed as "industrial MSG". As a polymer additive derived from natural cellulose, it accounts for just 0.1%–0.5% of the mix in ready-mixed mortar and building insulation systems. Yet it significantly optimizes material performance, acting as a key driver for green, energy-efficient construction. I. Core Roles in Ready-Mixed
