Glass, Carbon or Aramid: A Selection Matrix for FRP Strengthening
Three fibres, three cost points, three failure profiles. A practical comparison of modulus, elongation, durability and cost for structural strengthening.
Contributor
Daniel Whitmore
Materials consultant · 3 published articles
Carbonation Depth Testing: What the Phenolphthalein Line Actually Tells You
The purple line is not a measurement of damage. It is a pH indicator read against a rough surface, and misreading it is how good concrete gets replaced.
Epoxy or Polyurethane? Choosing an Injection Resin for Crack Repair
Both resins go into a crack through a port. Only one of them is structural, and the choice depends on whether the crack is moving, wet or wider than you assumed.