【作者】 罗惠莉；

【导师】 陈吉春；

【作者基本信息】 武汉理工大学 ， 环境工程， 2003， 硕士

【摘要】 硬石膏因其胶凝性差，虽然资源丰富，但利用率不高，更有将其废弃造成环境污染。采用废弃的硬石膏生产各种建筑材料和制品，是硬石膏资源化利用的重要途径，既可保护环境，又产生了经济效益。 硬石膏能与水缓慢的反应生成石膏，这是其可以作为建筑材料的化学基础。将硬石膏磨细、加入激发剂、进行煅烧均可以显著改善它的水化性能。只有提高硬石膏的水化速度，才能使硬石膏的工业应用成为可能，这也是硬石膏改性研究的关键。 原有硬石膏G-N-M-J四元复合激发体系的改性研究已取得了较好的成果，得到了凝结时间控制在30min的硬石膏胶结料。本研究在此基础上对硬石膏进行煅烧改性和复合激发体系的调整，进一步改善其胶凝性能及工业应用性能，摸索出改性效果好，适宜工业生产的配比条件。根据实验结果和测试分析，探讨煅烧改性的作用机理。 通过系统的实验，确定了煅烧的各项工艺参数。再进一步调整复合激发体系中各组分的含量，得到了具有最佳性能的改性硬石膏混合料配比。使得硬石膏浆体的初凝时间控制在10min，终凝时间15min左右，且干燥强度和稠度性能优良。 本研究对硬石膏资源的开发利用有一定的指导意义，使硬石膏工业生产成为可能，使矿山废弃硬石膏的环境污染问题不仅得以最终解决，并能产生良好的经济效益。更多还原

【Abstract】 Anhydrite is resourceful and is not used effectively because of its poor gelling property, especially, its abandonment results in environment pollution. It is the important way of anhydrite-resourced use that to produce all kinds of construction materials and products by using wasted anhydrite, so it not only protect environment, but also make economical efficiency.The ability of anhydrite to react with water slowly to make gypsum forms the chemical basis for its use as a construction material. It can substantially improve the hydrating capability by grinding finely, adding activators and calcining. The industry apply of anhydrite will become impossible only after the hydrating velocity has been perfected. This is the key of the research of anhydrite modification.It had achievement under the study of G-N-M-J four-factor compound arousing system. It gains anhydrite cement, which coagulates in 30 minutes. This study improved anhydrite by calcining and adjusting the compound arousing system based on the system, therefore the coagulation and industry capability of anhydrite will be amended. The composition proportion, which have good modification effect and is suitable for industry producing will be tried to find out by combining calcining and compound-arousing system. Acting mechanisms of calcining will be discussed based on experiment result and test analysis.After items and systems tests, series technical parameters have been gotten. The proportions of the composition of modification anhydrite, which have the best capacity, have been obtained by modifying the content of every component of the compound system. The initial setting time of modified anhydrite has been controlled about 10 minutes, and the final setting time is about 15 minutes. The capacity of intensity and density is perfect.This research will guide the utilization of anhydrite. It makethe anhydrite industry produce come to realize, it solve the environment pollution of wasted anhydrite completely, and it will produce excellent economical efficiency.更多还原