摘要
针对玻化微珠保温砂浆在矿井内壁应用的局限性,利用单因素实验,并借助各种物理性能测试方法和扫描电镜(SEM)观察,分析了玻化微珠和超细粉煤灰在改善井下固壁砂浆导热性能、强度、耐久性等方面的作用。研究表明,玻化微珠保温轻骨料可有效改善砂浆的导热系数,但同时也会破坏材料的力学性能、耐候性能;超细粉煤灰可以改善材料的导热性、耐久性能以及孔结构,但掺量过多也会显著降低力学性能。保温砂浆的最优配合比是:2%玻化微珠、10%超细粉煤灰、2%可再分散乳胶粉、5%石灰以及1%石膏。
Considering the application limitations of glass beads insulation mortar inside shaft lining in mines, through the single-factor experiments and with the aid of various physical performance test and scanning electron microscopy（SEM） observation to analyze the role of each glass beads and ultrafine ash in the solid wall mortar,which conclude the thermal conductivity, strength,durability and pore structure of mortar. The results showed that the adulteration of lightweight aggregate glazed hollow bead can effectively improve the thermal conductivity coefficient, but it will also destroy the material properties of mechanical and weather resistance. The superfine fly ash can not only improving the durability of the material, but the durability and pore structure. However, too much content can also significantly reduce the mechanical properties. The optimal material mixture ratio determined to be： 2% glazed hollow bead, 10% ultra-fine fly ash, 2% re-dispersible powder, 5% lime and 1% gypsum.
出处
《非金属矿》
CAS
CSCD
北大核心
2014年第6期29-32,共4页
Non-Metallic Mines
基金
国家自然科学基金(51175004)
2012年安徽高校省级自然科学重点研究项目(KJ2012A078)
关键词
保温砂浆
玻化微珠
超细粉煤灰
导热系数
thermal insulation mortar
glass beads
ultra-fine fly ash
thermal conductivity coefficient
