Fire Protection of Steel Elements Using Lightweight Hybrid Cement Mortar

Abstract

Material properties of steel structures are significantly reduced at high temperatures, so a fire protection has strong positive impact on the fire resistance of the structure. Fire resistance of steel elements can be increased using a layer of cement-based materials as a fire protection. Most of commonly used cement-based materials do not withstand high temperatures without noticeable reduction of mechanical properties. Hybrid cement showed some interesting properties in the way of resistance to high temperatures and adhesion to steel surfaces, thus its behavior during fire exposure should be investigated. One experimental analysis with numerical simulation is presented in this article. It examines thermal material properties of lightweight hybrid cement mortar with expanded perlite from a simple experiment with a lab gas burner.

Application of hybrid cement in passive fire protection of steel structures

“…Preliminary results (Daxner, 2016) have demonstrated the superior resistance of lightweight mortars made from alkali-activated cement when compared to mortars made of equivalent gypsum binder or aluminate cements. Pilot tests for a larger experiment were carried out on a laboratory burner (Šulc et al ., 2021).…”