Research of the effect of compactness of fireproof mud plugging and proportion of backing material on fireproof performance

Abstract

Building fire sealing technology is of great importance in preventing the spread of fire in buildings and reducing the damage caused by fire accidents. In order to investigate the influence of compactness, thickness and proportion of backing material on the fireproof performance of fireproof plugging material, this paper carries out experimental analysis on the pyrolysis process of fireproof plugging material to obtain the relevant parameters, and adopts a small-size fireproof mud-blocking combustion experimental platform to carry out combustion experiments. The experimental results prove that: with the increase of compactness, the thermal insulation and fireproofing performance of fireproof plugging material are enhanced; when the backing material is glass wool, the thermal insulation and fireproofing performance decreases with the increase of the proportion of glass wool; the expansion of fireproof plugging material caused by fire causes the hysteresis phase of thermal response in part of the cross section, and the time period of the hysteresis phase is delayed with the increase of compaction of fireproofing mud, and delayed with the decrease of the proportion of the thickness of backing material. The hysteresis phase is delayed with increasing compactness of fireproof plugging material and decreasing thickness of the backing material. The results of this paper can provide theoretical assistance for the expansion of fireproof plugging material by fire and for the process of installation.