水泥基气凝胶涂料防火性能试验研究

Experimental study on fire-proof property of cement-based aerogel coating

文章利用气凝胶板生产过程中的气凝胶废料配制水泥基防火涂料,通过试验研究该涂料的防火性能与气凝胶粉掺量的关系.研究表明,水泥基气凝胶涂料具有较好的防火性能,涂料的导热系数随着气凝胶掺量的增加而下降,涂料干容重从813 kg·m^(-3)降到527 kg·m^(-3)时,防火涂料的导热系数由0.227 W·m^(-1)·K^(-1)降至0.084 W·m^(-1)·K^(-1).涂料的防火性能随着气凝胶掺量的增加表现出先增强后减弱的特征,当涂料干容重从813 kg·m^(-3)降至583 kg·m^(-3)时,涂料的耐火极限时间由41 min增长至70 min,干容重进一步降低到527 kg·m^(-3),其耐火极限时间下降至50 min.

A kind of cement-based fire-proof coating is presented in this paper. This coating is made of aerogel waste powder from the production of aerogel plates. The relationship between the fireproof performance of the coating and the dosage of aerogel powder is investigated. The results show that the cement-based aerogel coating has good fireproof performance. The conductivity coefficient of the coating decreases with the increase of aerogel dosage. The conductivity coefficient of the fireproof coating decreases from 0. 227 W · m 1 · K 1 to 0. 084 W · m 1 · K 1 with the decrease of the dry bulk density from 813 kg · m 3 to 527 kg · m 3. The fire-proof perform-ance of the coating is strengthened and then weakened with the increase of the aerogel dosage. The fire-proof limit time of the coating increases from 41 minutes to 70 minutes with the decrease of the dry bulk density from 813 kg · m 3 to 583 kg · m 3. The fireproof limit time decreases to 50 minutes with the decrease of the dry bulk density to 527 kg · m 3.Key words： cement-based; aerogel; fire-proof coating; thermal conductivity; fire-proof property