摘要
以煤矸石和煤炭伴生页岩为主要原料,滑石粉为助熔剂,抛光渣为造孔剂制备煤矿废弃物泡沫陶瓷.研究不同烧成升温速率对煤矿废弃物泡沫陶瓷表观密度、吸水率、孔隙率、抗压强度、微观孔隙特征及等温吸放湿性能的影响.结果表明:随着烧成升温速率的提高,煤矿废弃物泡沫陶瓷的开口孔隙率降低,吸水率减小,抗压强度提高,平衡含湿量减小.当烧成升温速率为10℃/min时,煤矿废弃物泡沫陶瓷的表观密度小于0.7g/cm3,孔隙率大于70%(体积分数),吸水率约为0.02%(质量分数),抗压强度达到12MPa,在相对湿度97.3%下的平衡含湿量小于0.003 1kg/kg,有利于减少潮湿环境造成的霉菌滋生,降低建筑能耗并营造健康的室内空气环境.
A foam insulation ceramic made of waste from coal mine was prepared by using coal gangue and shale as the main raw material,talc as fluxing agent,and polishing slag as pore-forming agent.The effects of different heating rates on the bulk density,water absorption,porosity,compressive strength,microporous morphology and isothermal adsorption/desorption performance of foamed ceramics were studied.The results show that the number of interconnected open porosity in the ceramic foam is reduced while the heating rate increases.The water absorption and the equilibrium moisture of absorption/desorption process are both small while the compressive strength is high.When the heating rate is 10 ℃/min,the bulk density of the ceramic foam is less than 0.7 g/cm3,the porosity is greater than 70%,the water absorption is only 0.02%,and the compressive strength can reach 12 MPa;When the relative humidity of environment is 97.3%,the equilibrium moisture content is less than 0.003 1 kg/kg.It is helpful to reduce the risk of mould growth which is caused by the wet environment,reduce building energy consumption and create a healthy indoor air environment.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2018年第1期169-173,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(51362021)
江西省研究生创新专项资金资助项目(YC2016-S047)
关键词
泡沫陶瓷
煤矿废弃物
吸放湿性能
foam ceramic
coal mine waste
isothermal adsorption/desorption
