Study on Fire Resistance Characteristics of Fire Protection Materials of High water content

高含水防火材料耐火特性研究

基本信息

批准号：
11650232
负责人：
ASAKO Yutaka
金额：
$ 2.3万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650232/
关键词：
Fire protection material High water content Super absorbent polymer Calcium chloride solution Gel Fire resistance test

项目摘要

It is well known that moist fire protection materials show good fire resistance characteristics. For this reason, these materials are usually made of mixtures of cement mortar and high-water content materials such as silica gels or moist perlites. The latent heat of water plays an important role in the resistance of heat propagation in these materials. Recently, a fire resistance test on a perlite-mortar mixed with the super-absorbent polymer gel which absorbed the calcium chloride solution have been conducted and it was concluded from the temperature response of this fire protection material that the tested material have very good fire resistance characteristics. However, the composition of the tested material was fixed at the mixing ratio of gels and perlite-mortar, V_<gel>/V_<pm>=1, and the mixing ratio of perlite and cement, V_p/V_c=1. These mixing ratios may affect on the fire resistance characteristics and there may exist the optimum mixing ratios. This is the motivation of the p … More resent study.In this study, to find the fire resistance characteristics and parameters dominating the fire resistance characteristics, the thermal conductivity and the water content were measured for materials whose mixing ratios were combination of V_p/V_c=1 and 3 ＆ V_<gel>/V_<pm>=1 and 2. And using the measured thermal properties of the test materials, numerical simulations for the fire resistant test were conducted. The main conclusions obtained are :(1) Both the water content and the effective thermal conductivity are important parameters for the fire resistance material. And the mass fraction of free water in the test material increases with increasing the mixing ratio of the gels and perlite-mortar.(2) In the high temperature range above 373 K, the effective thermal conductivity decreases with increasing the mixing ratio of perlite and cement. And the effective thermal conductivity decreases with increasing the mixing ratio of gel and perlite-mortar.(3) The longest fire resistance time among the test materials is 330 minutes. Less

众所周知，潮湿的防火材料显示出良好的防火特性。因此，这些材料通常是由水泥砂浆和高水分含量材料（例如硅胶或潮湿的珍珠岩）组成的。水的潜热在这些材料中热传播的抗性中起着重要作用。最近，已经进行了吸收氯化钙溶液的超吸收性聚合物凝胶的perlite-Mortar上的耐火试验，并从该防火材料的温度响应中得出结论，该材料的温度响应具有良好的火力阻力特性。但是，测试材料的组成固定在凝胶和珍珠岩 - 莫尔塔尔的混合比，v_ <gel>/v_ <pm> = 1，以及珍珠岩和水泥的混合比，v_p/v_c = 1。这些混合比可能会影响耐火特性，并且可能存在最佳混合比。这是P…更多评论研究的动机。在这项研究中，为了找到支配火力阻力特征的防火特性和参数，测量了与V_P/V_C = 1和3＆V_C/V_ <GEL>/V_ <GEL>/v_p _ PM> = 1和2的材料的混合材料的材料测量的材料，并使用了射击材料。实施。获得的主要结论是：（1）水含量和有效导热率都是火力阻力材料的重要参数。测试材料中游离水的质量分数随着凝胶和珍珠岩 - 莫尔达的混合比的增加而增加。（2）在高于373 K的高温范围内，有效的热导率随着珍珠岩和水泥的混合比的增加而降低。并且有效的导热率随着凝胶和珍珠岩肉质的混合比的增加而降低。（3）测试材料中最长的耐火时间为330分钟。较少的