Citation

Yu S, Wei Y, Yang D, Xie G. China Saf. Sci. J. 2019; 29(1): 31-36.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.01.006

PMID

unavailable

Abstract

To solve the problem of rapid propagation of fire and the production of toxic smoke in building exterior insulation system, a kind of self-leveling mortar was made by using magnesium hydroxide as an inorganic flame retardant and polycarboxylic acid water reducer as admixture. The effect of the self-leveling mortar coated on the surface of EPS on flame-retardant properties of fire-resistant polystyrene board was studied by carrying out orthogonal test. The results show that the amount of water reducing agent can change the thickness of mortar cover by affecting the fluidity of self-leveling mortar, which is the main factor affecting the results of oxygen index (LOI) test, that among the four factors, the effect of Mg(OH)2 content on peak heat release rate (pk-HRR), total heat release (THR) rate and ignition time (TTI) is especially obvious, that the replacement rate of fly ash is the main factor affecting the smoke density grade, that the best proportioning of gypsum based self-leveling mortar with good flame retardance is that water binder ratio is 0. 30, fly ash substitution rate is 30%, water reducing agent content is 0. 2%, magnesium hydroxide content is 12%, and that the flame retardant and smoke suppression effects of EPS boards can be significantly improved by flame retardant treatment. © 2019 China Safety Science Journal. All rights reserved.

Language: zh