Utilising fly ash and fine tailings in foamed insulation materials of building
This paper describes an extensive laboratory-based investigation into the use of fly ash and fine tailings in one type of insulation materials of building materials-foamed concrete.Foamed concrete with apparent density from 500 to 1 000 kg/m3 , compressive strength from 1 to 14.5 MPa and thermal conductivity from 0.06 to 0.145 W/(m · ℃) were prepared when a large volume of cement(up to 60 wt.%) have been replaced with fly ash and fine tailings.The rheologic, mechanical and heat preservation properties were investigated for the foamed concrete.The results shows that using fly ash and fine tailings can significantly enhance the theologic property of fresh foamed concrete.In addition, up to 60% of the cement could be replaced without obvious reductions in long-term strength and thermal conductivity in relative higher density(1 000 kg/m3).By using fly ash or fine tailings as fine aggregate in foamed concrete, the high volume utilization of these industrial waste becomes possible, thus providing a means of economic and safe disposal of these waste residues.
fly ash fine tailings foamed concrete building walls thermal conductivity
She Wei Zhang Yunsheng Ni Ziwei Chen Wei Qin Honggen Shi Xing
Jiangsu Key laboratory for Construction Materials,Southeast University,Nanjing,211189,China Department of Architecture,Southeast University,Nanjing 210096,China
国内会议
南京
英文
496-501
2010-05-07（万方平台首次上网日期，不代表论文的发表时间）