Numerical Modeling of the Long-Term Behavior of Passive Fire Protection Mortars Applied on Concrete Tunnels

In terms of dimensional stability and long-term durability, overlay mortar design can be complicated. Often, a few years after applied or passive fire protection (PFP) mortars are applied, they delaminate or crack. Durability requirements and fire protection requirements must be combined for the mortar to not delaminate or crack during the planned service life. The authors describe a numerical model based approach to forecasting PFP mortar long-term behavior. Realistic calculation of crack formation, as well as time-dependent distributions of strain, stress, temperature, and humidity are possible through this model. In order to prevent planned service life delamination, a minimal adhesive strength between substrate and overlay is needed, and a calculation has been completed, with climatic boundary conditions and material properties taken into account. Tailored PFP mortar optimization is allowable through the results.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Authors:
  • Martinola, Giovanni
  • Bauml, Martin F
  • Walliser, Andre
• Publication Date: 2007-6

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 484-491
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 19
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Calculation; Climate; Concrete; Cracking; Delamination; Design; Durability; Mortar; Optimization; Overlays (Pavements); Service life; Stability (Mechanics); Tunnels
• Uncontrolled Terms: Boundary conditions; Fire protection; Long term behavior; Numerical models; Passive forces
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01051719
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 19 2007 8:27AM