环氧树脂复合调温剂调温效果与沥青混合料比热容试验研究

发布时间：2018-03-23 11:41

本文选题：道路工程　切入点：环氧树脂复合调温剂　出处：《长安大学》2017年硕士论文

【摘要】：沥青混合料的路用性能受环境温度影响较为显著,高、低温环境下的车辙、开裂等与温度相关的路面病害严重影响了沥青路面的使用性能和服务寿命。项目组前期研究研制的公路用微胶囊型相变调温剂可以利用其相变潜热特性降低沥青混合料的温度敏感性,但微胶囊相变调温剂在沥青混合料的高温拌和阶段渗漏挥发严重,明显降低了其调温效果,因而采用环氧树脂对微胶囊相变调温剂进行封装,并利用自行研发的小试设备提高了环氧树脂复合调温剂的生产效率与成品质量,较好地解决了渗漏损失问题。本研究在此基础上对环氧树脂复合调温剂掺入沥青混合料的实际调温效果和掺复合调温剂沥青混合料的比热容开展试验研究,以期为进一步路面温度场研究和工程应用奠定基础。本研究在环氧树脂复合调温剂小试设备制备工艺的基础上,利用小试设备生产的复合调温剂制作了不同掺量的沥青混合料试件,通过降温模拟试验,观测与分析不同掺量调温剂沥青混合料在降温过程中的温度变化情况,采用降温过程中掺与未掺复合调温剂沥青混合料之间的最大温差以及复合调温剂的潜热积温值和潜热调温指数分析环氧树脂复合调温剂的实际调温效果,发现在相同的低温环境下,掺与未掺复合调温剂沥青混合料的温度变化出现了明显差异,复合调温剂的掺量越大,沥青混合料的降温速率越小,与未掺沥青混合料的温差越大;调温剂的潜热积温值和潜热调温指数越大,发挥调温作用的速率越快,调温能力越强。在传统小容量比热容测试方法的基础上,从控制换热系统热量散失和保温效果的角度出发,通过比热容试验对不同掺量复合调温剂沥青混合料的比热容进行了测试分析,研究发现掺复合调温剂沥青混合料的比热容在复合调温剂的相变温度范围内会出现明显的峰值,峰值的大小与复合调温剂的掺量有关;最后通过统计回归分析,得出了复合调温剂沥青混合料的比热容—温度关系式。
[Abstract]:The pavement performance of asphalt mixture is significantly affected by ambient temperature. Cracking and other temperature-related pavement diseases have seriously affected the performance and service life of asphalt pavement. The microencapsulated phase change thermostats developed by the project team in the early stage of the project can be used to reduce the asphalt by using the latent heat characteristics of the phase change. The temperature sensitivity of the mixture, However, the microencapsulated phase change thermostats are seeping and volatilizing seriously in the high temperature mixing stage of asphalt mixture, which obviously reduces the effect of temperature regulation. Therefore, epoxy resin is used to encapsulate the microencapsulated phase change thermostats. The production efficiency and the finished product quality of the epoxy resin compound thermostat were improved by using the small scale test equipment developed by ourselves. The problem of leakage loss is well solved. On the basis of this, the actual temperature regulating effect of epoxy resin compound thermostat mixed with asphalt mixture and the specific heat capacity of asphalt mixture mixed with compound temperature-regulating agent are studied experimentally. In order to lay a foundation for further research and engineering application of pavement temperature field. The bituminous mixture samples with different contents were made by using the compound temperature-adjusting agent produced by the small scale test equipment. The temperature change of the asphalt mixture with different contents was observed and analyzed in the process of cooling through the simulation test of cooling down. Using the maximum temperature difference between the asphalt mixture and the mixture, the latent heat accumulated temperature value and the latent heat regulating index of the compound thermostat, the actual temperature control effect of the epoxy resin compound thermostat was analyzed. It is found that under the same low temperature environment, the temperature variation of asphalt mixture mixed with and without compound temperature adjuster appears obvious difference. The bigger the content of compound temperature regulator is, the smaller the cooling rate of asphalt mixture is, and the greater the temperature difference between asphalt mixture and unmixed asphalt mixture is. The larger the latent heat accumulated temperature value and the latent heat regulating index of the thermostat, the faster the temperature regulation rate is and the stronger the temperature regulation ability is. On the basis of the traditional measurement method of specific heat capacity of small capacity, From the point of view of controlling heat loss and heat preservation effect of heat transfer system, the specific heat capacity of asphalt mixture with different contents of compound temperature adjuster was tested and analyzed by specific heat capacity test. It is found that the specific heat capacity of asphalt mixture mixed with compound temperature-regulating agent will appear obvious peak value in the range of phase change temperature of compound temperature-regulating agent, and the magnitude of peak value is related to the content of compound thermostat. Finally, through statistical regression analysis, The relationship between specific heat capacity and temperature of asphalt mixture with compound thermostat is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

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