Intumescent geopolymer-bound coatings for fire protection of steel

• DOI: 10.4416/jcst2017-00035
• Publication Date: 2017-01-01
• Authors: Marie-Bernadette ...; Gregor J. G. Gluth; Patrick Sturm; William D.A. Rickard; Simone Krüger; Bernhard Schartel
• Keywords: Intumescent; Fire performance

The passive fire protection of steel structures and other load-bearing components will continue to gain importance in future years. In the present contribution, novel intumescent aluminosilicate (geopolymer-bound) composites are proposed as fire-protective coatings on steel. Steel plates coated with these materials were exposed standard temperature-time curve defined ISO 834 – 1:1999. partially foamed during curing expanded further thermal exposure, demonstrating their characteristic.Thermogravimetryandoscillatory rheometry determined that behavior is attributed a transition viscous state (loss factor > 1) temperature range major water release, differing from conventional geopolymers. XRD SEM images showed had characteristics ceramic or glass-ceramic foams after resistance testing, suggesting superior performance under challenging conditions. thickness influenced foaming thus time for reach 500 °C. A number additives also studied best obtained samples containing sodium tetraborate.Acoating just 6mmwas able delay it takes substrate °C more than 30 minutes.