碳酸钠对粉煤灰泡沫玻璃性能影响的研究

发布时间：2018-05-14 05:24

本文选题：碳酸钠 + 粉煤灰泡沫玻璃　；参考：《中国陶瓷》2017年06期

【摘要】：发泡剂对泡沫玻璃物理力学性能有显著的影响。为了探究碳酸钠掺量对泡沫玻璃性能的影响及成孔机理,以20%粉煤灰和80%玻璃粉为基料,分别采用2%、3%、4%、5%和6%碳酸钠掺量,制备粉煤灰泡沫玻璃,并进行了测定;通过试验研究了碳酸钠掺量对粉煤灰泡沫玻璃的导热系数、表观密度、机械强度及孔隙率等性能指标的影响,并对碳酸钠在泡沫玻璃中的成孔机理进行了分析。当碳酸钠的掺量为5%时,导热系数为0.0735 W/(m·K),达到最小,抗压强度为1.58 MPa,抗折强度为0.75 MPa,表观密度为0.276 g/cm~3,孔隙率为87.7%,此时粉煤灰泡沫玻璃的空隙结构分布相对均匀且以封闭孔为主。泡沫玻璃孔径的大小与碳酸钠的粒径、发泡温度及压强等因素有关。当碳酸钠的粒径一定时,随着气泡内压强的增大,气泡直径减小;当泡内气体的压强一定时,气孔直径随着碳酸钠粒径的增大而增大。
[Abstract]:Foaming agent has a significant effect on the physical and mechanical properties of foamed glass. In order to investigate the effect of sodium carbonate content on the properties of foamed glass and its pore forming mechanism, 20% fly ash and 80% glass powder were used as base materials to prepare fly ash foamed glass with 2% 3% and 6% sodium carbonate respectively. The effects of sodium carbonate content on the thermal conductivity, apparent density, mechanical strength and porosity of fly ash foamed glass were studied, and the pore forming mechanism of sodium carbonate in foamed glass was analyzed. When the content of sodium carbonate is 5, the thermal conductivity is 0.0735 W / m K ~ (-1), the compressive strength is 1.58 MPA, the flexural strength is 0.75 MPA, the apparent density is 0.276 g / cm ~ (-3), and the porosity is 87.7%. The pore size of foamed glass is related to the diameter of sodium carbonate, foaming temperature and pressure. When the diameter of sodium carbonate is constant, the bubble diameter decreases with the increase of the pressure in the bubble, and the pore diameter increases with the increase of the diameter of sodium carbonate when the pressure of the gas in the bubble is constant.
【作者单位】：石河子大学水利建筑工程学院;
【基金】：国家自然科学基金(51468056) 石河子大学第十四期大学生研究训练计划项目(SRP2016110)
【分类号】：TQ171.1

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