摘要
以油页岩半焦和油页岩粉煤灰作为矿物掺和料,替代部分水泥制备玻化微珠保温砂浆,研究了两种废渣对玻化微珠保温砂浆稠度、干表观密度、强度、导热系数等性能的影响,探讨了两种废渣在玻化微珠保温砂浆中应用的可行性。结果表明,两种废渣替代部分水泥后均降低了保温砂浆的稠度和吸水率,保温砂浆的干表观密度随着替代量的增大均呈现先减小后增加的趋势。两种废渣替代水泥量在10%时可提高砂浆抗压强度,且有利于降低保温砂浆的导热系数;替代量达到15%时保温砂浆抗压强度降低,同时砂浆的导热系数提高。在同等替代量的条件下,油页岩粉煤灰保温砂浆样品抗压强度、吸水率和导热系数性能优于油页岩半焦保温砂浆样品。综合来看,两种废渣替代水泥量不宜超过10%,掺量过大对抗压强度、干表观密度和导热系数均有不利影响。
Two solid wastes of oil shale semi-coke and oil shale fly ash are used as admixtures to replace part of cement to prepare glass beads insulation mortar. The application feasibility of the two kinds of oil shale waste residues in glass beads insulation mortar is discussed. The influence of two solid wastes on the consistency, compressive strength, thermal conductivity and other properties of insulation mortar, was studied in this paper. The experimental results show that the consistency and water absorption of the thermal insulation mortar are reduced when the two kinds of waste residues replace part of the cement, the dry apparent density of the thermal insulation mortar shows a trend of first decreasing and then increasing with the increase of the replacement amount. When the amount of cement replaced by the two kinds of waste residues is less than 10%, the compressive strength of mortar can be improved, and the thermal conductivity of thermal insulation mortar can be reduced. When the replacement amount reaches 15%, the compressive strength of thermal insulation mortar an be reduced, and the thermell conductivity of mortar can be improved at the same time. Under the same substitution conditions, the compressive strength, water absorption and thermal conductivity of oil shale fly ash thermal insulation mortar samples are better than oil shale semi-coke thermal insulation mortar samples. On the whole, the two kinds of waste residues should not exceed 10% of cement,otherwise they have adverse effects on the compressive strength, dry apparent density and thermal conductivity.
作者
王淑娟
Wang Shujuan(School of Civil Engineering,Jilin University of Architecture and Technology,Changchun,Jilin 130114)
出处
《非金属矿》
CSCD
北大核心
2022年第1期23-26,共4页
Non-Metallic Mines
基金
吉林省教育厅项目(JJKH20211363KJ)。
关键词
油页岩半焦
油页岩粉煤灰
玻化微珠保温砂浆
抗压强度
导热系数
oil shale semi-coke
oil shale fly ash
glass beads thermal insulation mortar
compressive strength
thermal conductivity
