Polymer-modified fireproof coating for tunnel by redispersible powders
Published 2006 · N. Yi
Journal of Functional Biomaterials
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Abstract
Silicate fireproof coatings for tunnels(FCT) have many eminent properties.But lowadhesion strength and poor water/fire-resistance of this kind of materials largelyli mit its applications.Here fireproof coating for tunnels was modified by adding re-dispersible powders(2wt %).The ideal bonding systemconsisting of cement and redispersible powders could increase the adhe-sive strength with other base material and i mprove properties of water-resistance,fire-resistant ti me,weather-resisting of FCT.The polymer-modified FCT was a new kind of mono-integradient composite with easily application,and was greatly reduced thecost for transportation,storage and package.Results showthat whenthe thickness of the dry fil mis 10 mm,the fire-resistant ti meof the coating couldlast over two hours according to GA98-1995(Currency techno-termfire resistive coating for prestressed con-crete floor) and GB/T7798-88(Fire-resistance tests-elements of building construction).