利用低品位硫铁矿烧渣制备吸波沥青混合料的研究

发布时间：2018-01-08 05:21

本文关键词：利用低品位硫铁矿烧渣制备吸波沥青混合料的研究　出处：《西南科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：为了快速、有效的清除道路冰雪和养护修补道路,保持道路畅通和行车安全,国内外许多学者都致力于寻求一种简捷、快速、绿色的除冰手段和养护修补方法;微波除冰及微波养护修补作为一种简单方便的加热技术引起了广大国内外学者的注意,然而传统的道路铺筑材料的微波加热效率比较低,不能够快速的实现除冰和修补,因此,微波加热技术在道路除冰及养护修补上并未得到广泛应用。本文利用硫酸工业排放的硫铁矿烧渣,高温还原制备出具有吸波性能的高强陶瓷集料,全部或部分代替天然集料和矿粉,使沥青混凝土具备吸波性能。将入射到沥青混凝土内部的电磁能转化为热能,通过集料与集料之间的热传导,使沥青混凝土整体快速、均匀的加热,从而达到融化冰雪和快速修补的目的。通过实验分析硫铁矿烧渣的物化特性,利用其较高含量的铁氧化物含量及活性烧粘土硅铝质组分,在高温还原气氛下,将铁氧化物还原为磁铁矿,使制备的高强陶瓷集料具有良好的微波加热效率;研究了成型压力、烧结温度、保温时间、矿化剂掺量等因素对陶瓷集料抗压强度及微波加热效率的影响。结果表明,陶瓷的强度随成型压力的增加而增加,烧结温度的升高而增加,在一定的保温时间内,随着保温时间的延长而增加,随着矿化剂掺量的增加而增加;陶瓷的温升特性的变化趋势也与强度变化的变化规律相同。当还原剂与硫铁矿烧渣比值为0.1,Ca F2掺杂量5%,1350℃保温180min所制备得到的陶瓷的抗压强度为87.5 MPa,在微波环境下一分钟温升达到786℃。通过实验研究了所制备的吸波陶瓷集料的技术性质,根据JTG F40-2004公路沥青路面施工技术规范中AC-13沥青基复合材料的要求,利用吸波陶瓷集料代替天然集料,制备吸波沥青混凝土。通过微波加热实验对比了普通沥青混凝土与吸波沥青混凝土的微波发热效率及除冰效率,实验结果表明,随着吸波集料掺量的增加,吸波沥青混凝土的微波发热效率也随之增加;当吸波集料掺量为100%时,沥青混凝土的吸波发热效率是普通混凝土的16倍,且沥青混凝土整体加热均匀,除冰效率是普通混凝土的10倍左右。
[Abstract]:In order to quickly and effectively remove snow and road maintenance and repairing roads, traffic and traffic safety, many domestic and foreign scholars are committed to seeking a simple, rapid, and maintenance and repair method in the ice means green; deicing and microwave heating technology maintenance repair as a kind of simple and convenient caused the majority of scholars at home and abroad the attention of the microwave, however, microwave heating efficiency of traditional road paving materials is relatively low, can not achieve fast deicing and repair, therefore, the microwave heating technology in road deicing and maintenance repair has not been widely used. This paper uses the industrial emissions of sulfuric acid from pyrite cinder, reductive prepared with absorption strength ceramic wave properties of aggregates, in whole or in part to replace the natural aggregate and slag, the asphalt concrete with absorbing properties. The incident electromagnetic asphalt concrete internal energy into heat, The heat conduction between aggregate and aggregate, the asphalt concrete fast, uniform heating, so as to achieve the ice melting and rapid repair purposes. The physicochemical properties of pyrite slag through the experimental analysis, the iron oxide content and activity of the higher content of burnt clay silicon and aluminum components in high-temperature reducing atmosphere that will be the reduction of iron oxides are magnetite, the preparation of high strength ceramic aggregate has good microwave heating efficiency; the forming pressure, sintering temperature, holding time, factors such as the content of mineralizer effect of aggregate compressive strength and microwave heating efficiency of ceramics. The results show that the increase of the strength of the ceramics with the formation pressure increased, the increase of sintering temperature and increase in thermal insulation time, and increased with the prolongation of holding time increased with the increase of mineralizer dosage; the change trend of temperature rise characteristics of ceramics Also changes and changes in the intensity of the same. When the reducing agent and pyrite slag ratio is 0.1, Ca doped F2 5%, compressive strength of 1350 DEG C 180min prepared ceramic is 87.5 MPa in the microwave environment a minute temperature reaches 786 degrees Celsius. Through experimental study the properties of preparation technology the microwave absorbing ceramic aggregate, asphalt based composite materials according to the AC-13 JTG F40-2004 technical specification for construction of highway asphalt pavement requirements, by absorbing ceramic aggregate instead of natural aggregate, preparation of absorbing asphalt concrete. Through microwave heating experiments of microwave heating efficiency of ordinary asphalt concrete and absorbing asphalt concrete and the ice removal efficiency, the experimental results show that with the increase of absorbing aggregates, microwave heating efficiency of absorbing asphalt concrete increases; when absorbing aggregate content is 100%, the heat absorbing efficiency of asphalt concrete is universal 16 times the concrete, and the asphalt concrete is evenly heated, and the deicing efficiency is about 10 times that of the ordinary concrete.

【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34

【参考文献】