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Title: Development of Passive Fire Protection Mortars
Authors: Caetano, Hugo Filipe dos Santos 
Laím, Luís Miguel dos Santos 
Santiago, Aldina Maria da Cruz 
Durães, Luisa 
Shahbazian, Ashkan 
Keywords: Cement; Fire; Gypsum; Heat transfer; Insulation; Mortar; Nano-and microsilica; Passive fire protection; Steel columns
Issue Date: 2022
Project: FCT PTDC/ECI-EGC/31850/2017 (NANOFIRE—Thermal and Mechanical behaviour of Nano Cements and their application in steel construction as fire protection) 
FCT POCI-01-0145-FEDER-007633 
Regional Operational Programme CENTRO2020 project CENTRO-01-0145-FEDER-000006 
University of Coimbra (UC) Scientific Employment Stimulus Programme 
European Regional Development Fund 
European Social Fund 
European Structural and Investment Funds 
Serial title, monograph or event: Applied Sciences (Switzerland)
Volume: 12
Issue: 4
Abstract: During a fire event, the stability of steel structures may be compromised, and structural collapse may occur due to the loss of their mechanical resistance as the temperature increases. One of the solutions to reduce this problem is the protection with a coating using enhanced fire-resistant mortars. This paper reports a detailed experimental work aiming to develop gypsum and cementbased mortars for passive fire protection and evaluate their composition’s effect in the final thermal performance. Two types of specimens were tested: (i) small specimens composed of a mortar coating (10 mm thick) and one steel plate and (ii) square section short tubular steel columns with 20 mm of coating. The evaluation of the thermal protection was carried out by (a) measuring the thermal gradient between the exposed surface of the protected steel plate under high temperatures and the mortar-steel interface and (b) assessing the fire resistance of the short steel columns. It was concluded that the compositions with gypsum binder present better thermal insulation than the cementitious compositions. Additionally, the introduction of nano-and microparticles of silica still slightly improved the thermal insulation of the tested compositions.
ISSN: 2076-3417
DOI: 10.3390/app12042093
Rights: openAccess
Appears in Collections:I&D ISISE - Artigos em Revistas Internacionais
I&D CIEPQPF - Artigos em Revistas Internacionais

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