Volume 44, Issue 7 pp. 966-974
RESEARCH ARTICLE

Synergistic fire-retardancy properties of melamine coated ammonium poly(phosphate) in combination with rod-like mineral filler attapulgite for polymer-modified bitumen roofing membranes

Saif Ullah

Saif Ullah

Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Denmark

Search for more papers by this author
Pierrick Anthony Mindykowski

Pierrick Anthony Mindykowski

Department of Civil Engineering, Technical University of Denmark, Lyngby, Denmark

Search for more papers by this author
Rolff Ripke Leisted

Rolff Ripke Leisted

Department of Civil Engineering, Technical University of Denmark, Lyngby, Denmark

Search for more papers by this author
Sergey Chernyy

Sergey Chernyy

Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Denmark

Search for more papers by this author
Sie Woldum Tordrup

Sie Woldum Tordrup

Danish Technological Institute, Aarhus, Denmark

Search for more papers by this author
Grunde Jomaas

Grunde Jomaas

Department of Civil Engineering, Technical University of Denmark, Lyngby, Denmark

Search for more papers by this author
Kristoffer Almdal

Corresponding Author

Kristoffer Almdal

Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Denmark

Correspondence

Kristoffer Almdal, Technical University of Denmark, DTU Nanotech – Department of Micro- and Nanotechnology, Produktionstorvet, 2800 Kgs. Lyngby, Denmark.

Email: [email protected]

Search for more papers by this author
First published: 18 August 2020
Citations: 1

Funding information: Innovationsfonden, Grant/Award Number: 79-2012-1

Summary

A novel intumescent (carbonization, acid donor and foaming) fire retardant that mimics carbon nanotubes was introduced into bitumen roofing and characterized using cone calorimetry as the main analytical tool. The experimental results indicate that 18% (by mass) attapulgite mineral (ATTP) mixed with base bitumen decreased the peak heat release rate per unit area (pHRRPUA) by 10%. Further, incorporation of melamine coated ammonium polyphosphate (MAPP) decreased the pHRRPUA by 52% and a mixture of these (3:1, ATTP:MAPP) decreased the pHRRPUA by 25% as compared to adding CaCO3 as a filler. The residual mass loss after the cone test was also improved with up to 3%. The indication of a positive synergistic flame retardant effect of the ATTP-MAPP mixture is supported by thermogravimetric analysis. The addition of this rod-like mineral improved the general fire retardant properties of the base bitumen and increased the viscosity. Therefore, the polymer-modified bitumen with both fire retardant and rheological properties (providing mechanical strength) is a promising novel approach in the design of bitumen roofing membranes.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.