Randomized trial compares adhesion evaluation criteria for mortar coatings in buildings, suggesting need for standard harmonization.
Key Points
This review aims to evaluate and compare the adhesion strength testing standards for mortar coatings, highlighting discrepancies in their criteria and implications for practice.
Compared adhesive evaluation criteria across three standards regarding mortar coatings.
Analyzed facade inspection test results from buildings in Brasília, Brazil.
Calculated degree of convergence between evaluation outcomes classified as pass, fail, or discarded.
The Brazilian standard for tensile bond strength showed more conservative assessments, increasing failure likelihood even near threshold values.
The European standard was more lenient but vulnerable to outliers impacting evaluations.
All standards lacked consideration for rupture modes, potentially compromising adhesion evaluation accuracy.