Liang Yuanyuan, Guan Yan, Bi Wanli
Institute of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114031, China.
Research Institute of Keda Fengchi Magnesium Building Materials, Anshan 114031, China.
Materials (Basel). 2022 Feb 15;15(4):1446. doi: 10.3390/ma15041446.
At present, the utilization of boron resources in China is increasing, and the problem of boron tailing pollution is becoming increasingly serious. To fundamentally solve the problem of boron tailing, many scholars at home and abroad have mainly studied the curing effect in terms of compressive strength, and little research has been carried out into the solidification effect and hydration products. This study explored the effects of adding different alcohol-based modifiers on the hydration products of magnesium oxysulfate cement-boron mud mixture, the microstructure, physical properties and curing effects of the samples. The results show that magnesium oxysulfate cement is beneficial to the solidification of boron in boron mud due to its low-alkali. Adding an alcohol-based modifier can increase the compressive strength of magnesium oxysulfate cement-boron mud blends. After adding acrylic acid and D-Mannitol, the 28-day compressive strength of the sample increased by 44.7 MPa. The blending of alcohol-based modifiers has a very good effect on the curing of boron in the whole system.
目前，我国硼资源的利用率不断提高，硼尾矿污染问题日益严重。为从根本上解决硼尾矿问题，国内外众多学者主要从抗压强度方面研究固化效果，而对固化效果及水化产物的研究较少。本研究探讨了添加不同醇基改性剂对硫酸镁水泥 - 硼泥混合物水化产物、样品微观结构、物理性能及固化效果的影响。结果表明，硫酸镁水泥因其低碱特性有利于硼泥中硼的固化。添加醇基改性剂可提高硫酸镁水泥 - 硼泥混合物的抗压强度。添加丙烯酸和D - 甘露醇后，样品的28天抗压强度提高了44.7MPa。醇基改性剂的掺配在整个体系中对硼的固化有很好的效果。
