Open AccessPreparation and Evaluation of Composite Flame Retardant Asphalt in Tunnel
Author(s) -
Qi Pang,
Jun Li,
Lei Gao,
Bo Sun,
Shenglei Yao
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/741/1/012029
Subject(s) - fire retardant , limiting oxygen index , materials science , softening point , asphalt , composite material , flammability , asphalt pavement , limiting , brominated flame retardant , composite number , forensic engineering , waste management , pyrolysis , engineering , char , mechanical engineering
Asphalt pavement becomes more and more popular in tunnel engineering, while its flammability is a serious problem that limits its development. In order to obtain a flame retardant asphalt, orthogonal design was utilized to investigate the best flame retardant content of magnesium hydroxide (MH), phosphorus (P) and decabromodiphenyl ethane (DBDPE). Limiting oxygen index (LOI), penetration, softening point and ductility tests were employed to evaluate the flame retardancy and pavement performance of asphalt. The results show that three kinds of flame retardants have positive influence on the low temperature performance and flame retardancy of SBS modified asphalt but not good for its high temperature performance. The best flame retardant content is determined as: 4% MH, 6% P and 8% DBDPE.