作为碱式硫酸镁水泥(BMSC)的原料之一,光烧氧化镁(MgO)的活性对水化速率有重要影响,水化产物,BMSC的力学性能。为了揭示包装方法的影响,存储环境,和储存时间对MgO活性和BMSC力学性能的影响,使用普通编织袋进行了一项实验,腹膜编织袋,和塑料和纸复合袋,以存储成品BMSC和原材料(轻烧MgO,MgSO4·7H2O,粉煤灰,和化学添加剂)在自然环境条件下,密封环境,潮湿的环境,分别。包装方法效果的对比分析,储存条件,通过砂浆试件的力学强度测试,研究了储存时间对MgO活性和BMSC力学性能的影响。结果表明,在密封的环境中,将轻烧MgO中a-MgO含量的损失降至最低,更有利于保持BMSC的力学性能稳定。在潮湿的环境中,BMSC的机械强度在早期(1天)显着降低,由于MgO的活性显着降低,并且成品BMSC和制备的BMSC在储存120天后的机械强度仍然丧失,无论包装方法如何。然而,储存环境和包装方式对BMSC的后期机械强度(28天)影响相对较小。建议在自然和密封环境中使用普通编织袋进行包装,因为这对于工程应用更经济。塑料和纸复合袋在潮湿环境中优于普通编织袋和腹膜编织袋。
As one of the raw materials of basic magnesium sulfate cement (BMSC), the activity of light-burned magnesium oxide (MgO) has an important effect on the hydration rate, hydration products, and mechanical properties of BMSC. To reveal the influence of packaging method, storage environment, and storage time on the activity of MgO and the mechanical properties of BMSC, an experiment was conducted by using ordinary woven bags, peritoneal woven bags, and plastic and paper compound bags to store the finished BMSC and the raw materials (light-burned MgO, MgSO4·7H2O, fly ash, and a chemical additive) under the conditions of natural environment, sealed environment, and wet environment, respectively. Comparative analysis of the effects of packaging method, storage conditions, and storage time on the activity of MgO and the mechanical properties of BMSC was performed through the mechanical strength test of mortar specimens. The results showed that in a sealed environment, the loss of a-MgO content in light-burned MgO was minimized, which was more conducive to keeping the mechanical properties of BMSC stable. In the wet environment, the mechanical strength of BMSC was significantly reduced in the early stage (1 day) due to the significant reduction in the activity of MgO, and the mechanical strength of the finished BMSC and prepared BMSC after 120 days of storage was still lost, regardless of the packaging method. However, the storage environment and packaging method had relatively little effect on the late mechanical strength (28 days) of BMSC. It is advisable to use ordinary woven bags for packaging in natural and sealed environments as this is more economical for engineering applications. Plastic and paper compound bags are superior to ordinary woven bags and peritoneal woven bags in wet environments.