Preparation and Properties of Buildingmaterials from Desulfu

发布时间：2023-05-14 18:48

　　在本研究中,使用脱硫石膏为原料。首先将脱硫石膏样品磨成粉末,然后过80目的筛子,得到脱硫石膏粉末样品。对脱硫石膏样品的基本物理化学属性进行分析,样品中主要的物相为二水石膏,化学成分主要为氧化钙、氧化硫,另外还含有少量的氧化镁、氧化铁和氧化铝等。论文进行了以脱硫石膏为原料制备石膏砌块的研究。首先将脱硫石膏粉在150℃,170℃,190°和200℃温度下焙烧1h,1.5h,2.5和3h。通过XRD和SEM表征发现,当焙烧温度为170℃时,所得样品的物相为半水石膏;采用标准稠度水试验法测定了掺加了脱硫石膏的切块的含水量,最佳的时间为2-3分钟,终凝时间为45-50分钟。采用最佳工艺条件制备了 1kg的半水脱硫石膏粉。通过钻孔机将500g的样品与70g的水混合搅拌20秒至25秒,并在钢模中放置5-15分钟。为了方便脱模,在模具侧面添加少量油。将所制备的脱硫石膏砌块分别在3种干燥条件下干燥。如:自然(阳光)干燥、室温下干燥、烘箱中干燥。在自然和室温干燥过程中,石膏砌块被保存了3周,而对于烘箱中的干燥,这些块在烘箱中保存了 24小时。最后对所得到的石膏砌块进行抗压和抗折测试,结果表明自然条件下干燥...

【文章页数】：56 页

【学位级别】：硕士

【文章目录】：
ABSTRACT
摘要
1 Introduction
    1.1 Research Background
        1.1.1 Two Types of Gypsum:Natural and FGD
        1.1.2 Physical Properties
        1.1.3 FGD Gypsum Applications
            1.1.3.1 Wallboard
            1.1.3.2 Sheathing
            1.1.3.3 Soffit board
            1.1.3.4 Water resistant gypsum
            1.1.3.5 Wood chip boards
            1.1.3.6 Mining applications
            1.1.3.7 Synthetic soil component
            1.1.3.8 Glass making
            1.1.3.9 Plaster
        1.1.4 Uses of Gypsum
        1.1.5 Importance of topic
        1.1.6 Aim
        1.1.7 Objectives
2 Literature Review
3 Materials and Methods
    3.1 Oven
    3.2 Shaker
    3.3 Grinding Machine
    3.4 Application of different temperatures on the Gypsum samples
    3.5 Particle Size
    3.6 Crystal Phase
    3.7 Scanning Electronic Microscope (SEM) Analysis
    3.8 Standard Consistency Water Test of FGD Gypsum
4 Results & Discussion
    4.1 FGD Gypsum
        4.1.1 Particle size
        4.1.2 Crystal phase
        4.1.3 Chemical component
    4.2 Heating treatment
        4.2.1 Crystal Phase
        4.2.2 Microscopic Morphology
        4.2.3 Standard Consistency Water Test of FGD Gypsum
    4.3 Preparation of Block
        4.3.1 Sample Weight
        4.3.2 Block
        4.3.3 Mould Size
    4.4 Compressive Strength
    4.5 Breaking Strength
    4.6 Discussion
Conclusion
References



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