轻质水泥基墙体材料的火灾性能实验研究  

Effect of fire temperature on the performance of ecological lightweight cement-based composite material

作　　者：王海蓉[1,2] 赵哲[1] 梁栋[1,2] 

机构地区：[1]中山大学工学院,广东广州510006 [2]广东省消防科学技术重点实验室,广东广州510006

出　　处：《消防科学与技术》2012年第7期661-664,共4页Fire Science and Technology

基　　金：广东省科技计划资助项目"阴燃机理及火灾物证鉴定的关键技术研究"(2009A030302002);广东省科技计划资助项目"广东省消防科学技术重点实验室建设"(2010A060801010)

摘　　要：利用热线法和液压伺服机,通过轻质水泥基墙体示范材料的现场测试测定火灾作用之后轻质竹纤维墙体的导热系数、残余抗压强度和弹性模量,研究了火灾温度对墙体保温、力学性能的影响。结果表明,温度在350℃时,剩余弹性模量最大,超过400℃之后,剩余弹性模量急剧下降;200℃时,材料的强度开始下降,400℃时,材料强度下降剧烈,600℃左右的高温作用会使材料严重破坏,并损失76%左右的抗压强度;200～350℃时,导热系数短暂下降,温度超过500℃时,少量开口气孔的存在使得材料的导热系数达到最大。Using hot-wire method and the hydraulic servo testing machine, thermal conductivity, elastic modulus, residual corn pressive strength of lightweight bamboo fiber monomer after fire were measured by on-site tests to study the effect of fire temperature on heat insulation and mechanical properties. Results showed that： When the temperature was 350℃, the material＇s remaining modulus reached the maximum, and after exceeding 400℃, the remaining compressive strength had a sharp decline; at 200℃, the strength of the material began to de cline, at 400℃ , the material strength decreased dramatically, and the material was serious destroyed after 600℃ , and 76;of the compressive strength was lost; from 200 ℃ to 350℃, as porosity increased, thermal conductivity appears a brief down- ward trend, and when temperature reached 500 ℃, small opening pores makes the thermal conductivity of the material reach the maximum.

关 键 词：轻质水泥基材料 火灾 导热系数 剩余抗压强度 剩余弹性模量 

分 类 号：X913.4[环境科学与工程—安全科学] TU528.2[建筑科学—建筑技术科学]