新型耐高温高强度磷酸盐胶凝材料的制备及性能研究

发布时间：2018-03-23 13:11

本文选题：磷酸盐　切入点：固化剂　出处：《上海师范大学》2017年硕士论文

【摘要】：截止目前,胶凝剂应用最多的主要有两种,一种是以黏土为代表的胶凝剂;一种是以硅酸盐无机粘结剂为主的胶凝剂。前者由于效率低下,切需要掺加煤,会对环境造成污染,后者由于溃散性差,易老化,难除去等因素,无法大面积推广。此时急需一种新型无机胶凝材料作为代替。磷酸盐由于具有无毒、无味、无公害等优点而倍受关注。湖北工业大学冶铸新材料研究所的张友寿、夏露、黄晋等教授对磷酸盐粘结剂的推广应用做了大量的研究工作,他们通过向铝磷酸盐粘结剂中分别加入硼酸和碳酸镁等改性剂,不仅使铝磷酸盐自硬砂的抗吸湿性能得到了显著提高,也大大改善了铝磷酸盐粘结剂的存放稳定性。本文以H_3PO_4、H_3PO_4-Al_2O_、H_3PO_4-Al(OH)3系为基础分别通过掺加填料Al_2O_、固化剂ZnO、MgO。研究了磷酸盐胶凝材料的固化工艺,剪切强度、耐热性等性能。通过对比发现,MgO固化剂最活泼,得到的磷酸盐胶凝剂各项性能也较好。通过扫描电镜对磷酸盐微观形貌进行了观察,并进行了机理分析。本论文还重点研究了磷酸盐胶凝材料的基料配方、磷酸盐胶凝材料配方对其固化时间,固化温度,剪切强度,耐高温性能的影响,在此基础上考察了以部分低温燃烧合成法制备的磷酸盐胶凝材料代替普通粉体作为制备磷酸盐胶凝材料性能的变化,实验结果表明通过调整基料,填料,固化剂的比列可以得到性能良好的磷酸盐胶凝材料。
[Abstract]:Up to now, there are mainly two kinds of gelling agents used most, one is a gelling agent represented by clay, the other is a gelling agent based on silicate inorganic binder. Because of its low efficiency, the former needs to be mixed with coal, which will pollute the environment. The latter is unable to be popularized in a large area because of its poor collapsibility, easy aging and difficult to remove. A new inorganic cementitious material is urgently needed as a substitute. Phosphate is non-toxic and tasteless. Professor Zhang Youshou, Xia Lu and Huang Jin of the Institute of Metallurgical and New Materials of Hubei University of Technology have done a lot of research on the popularization and application of phosphate binders. By adding boric acid and magnesium carbonate to the aluminophosphate binder respectively, they not only improved the hygroscopicity of aluminophosphate self-hardening sand, but also improved the hygroscopicity of aluminophosphate self-hardening sand. The stability of the aluminophosphate binder was also greatly improved. Based on Hs _ 3PO _ 4 / H _ 3PO _ 4-Al _ 2O _ O _ O _ 3 system H3PO _ 4-Alo _ (OH) _ 3 system, the curing process and shear strength of phosphate cementitious materials were studied by adding Al _ 2O _ 2O and solidified agent ZnO _ 2O _ (MgO) respectively. Heat resistance and other properties. It was found that the MgO curing agent was the most active, and the properties of the phosphate gelling agent were better. The morphology of phosphate was observed by scanning electron microscope. The effect of the formula of phosphate cementitious material on curing time, curing temperature, shear strength and high temperature resistance of phosphate cementitious material was also studied. On this basis, the properties of phosphate cementitious materials prepared by partial low temperature combustion synthesis method instead of ordinary powders were investigated. The experimental results showed that the base materials, fillers and fillers were adjusted. Phosphate cementitious material with good performance can be obtained by the ratio of curing agent.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ177

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