本文選題：微膠囊型相變調(diào)溫劑 + 瀝青混合料　； 參考：《長安大學(xué)》2014年碩士論文

【摘要】：瀝青路面受溫度影響較為明顯，低溫環(huán)境下的結(jié)霜、開裂，高溫環(huán)境下的車轍等與溫度相關(guān)的病害嚴(yán)重影響了瀝青路面的使用性能，改善和提高瀝青路面低溫抗裂性和高溫穩(wěn)定性，一直是國內(nèi)外學(xué)者長期研究的問題。項(xiàng)目組在前期研究中研制了公路用微膠囊型相變調(diào)溫劑（Micro-encapsulated phase change thermoregulation agent，簡寫為MEPCTA），研究表明相變調(diào)溫劑摻入瀝青混合料可以利用其相變潛熱特性，起到主動調(diào)控瀝青混合料溫度變化、改善瀝青路面溫度場的作用，從而提高瀝青路面應(yīng)對不利的溫度變化的能力。研究進(jìn)一步發(fā)現(xiàn)，比熱容是相變調(diào)溫劑和瀝青混合料的主要熱性質(zhì)參數(shù)之一，也是調(diào)溫效果分析必需的材料參數(shù)之一，但相關(guān)研究較少。 本研究在小容量試樣比熱容測試方法的基礎(chǔ)上，根據(jù)大體積復(fù)合材料的特點(diǎn)，從控制保溫效果和修正系統(tǒng)熱量散失出發(fā)，，提出了大容量試樣比熱容測定設(shè)備與方法，并對微膠囊相變調(diào)溫劑和瀝青混合料的比熱容進(jìn)行了測試分析。測試分析得出：在升溫過程中，微膠囊相變調(diào)溫劑在相變溫度域內(nèi)的升溫速率會有不同程度的減小，其比熱容會隨著溫度的變化而變化，尤其是在相變溫度域內(nèi)會產(chǎn)生明顯的峰值；通過分段的方程回歸得出相變調(diào)溫劑的比熱容——溫度推薦方程，進(jìn)而對該方程求積分得到調(diào)溫劑的相變焓和潛熱；摻加相變調(diào)溫劑的瀝青混合料在升溫過程中溫度曲線沒有明顯的拐點(diǎn)，升溫速率沒有明顯變化，比熱容同樣會隨著溫度變化，通過分段回歸曲線推薦出瀝青混合料的比熱容——溫度方程；在滿足路用性能要求的前提下，微膠囊相變調(diào)溫劑的摻量改變不會對影響瀝青混合料的比熱容產(chǎn)生顯著影響。
[Abstract]:The influence of temperature on asphalt pavement is obvious. Frosting, cracking, rutting and other temperature-related diseases in low temperature environment seriously affect the performance of asphalt pavement. Improving and improving the low temperature crack resistance and high temperature stability of asphalt pavement has been a long-term problem studied by scholars at home and abroad. In the previous research, the project group developed the micro-encapsulated phase-change temperature-adjuster (phase change thermoregulation agent,) for highway. The research shows that the mixing of the phase-change thermostat into the asphalt mixture can take the advantage of its latent heat property of phase change and play an active role in regulating the temperature change of the asphalt mixture. The function of temperature field of asphalt pavement is improved, and the ability of asphalt pavement to deal with unfavorable temperature change is improved. It is further found that specific heat capacity is one of the main thermal property parameters of phase change adjuster and asphalt mixture, and is also one of the necessary material parameters for the analysis of temperature regulation effect, but there are few related studies. Based on the measurement method of specific heat capacity of small volume samples and according to the characteristics of large volume composite materials, the equipment and method for measuring specific heat capacity of large capacity samples are put forward in this paper in order to control the heat preservation effect and correct the heat loss of the system. The specific heat capacity of microencapsulated phase change thermostat and asphalt mixture was tested and analyzed. The test results show that the heating rate of the microencapsulated phase change adjuster in the phase change temperature domain will decrease in varying degrees, and its specific heat capacity will change with the change of temperature. The specific heat volume-temperature recommendation equation of the phase change adjuster is obtained by the piecewise equation regression, and the phase change enthalpy and latent heat of the thermostat can be obtained by integrating the equation. There is no obvious inflection point in the temperature curve of asphalt mixture mixed with phase change temperature-adjuster, and the specific heat capacity will also change with the temperature. The specific heat volume-temperature equation of asphalt mixture is recommended by the piecewise regression curve, and the specific heat capacity of asphalt mixture will not be significantly affected by the change of the content of microencapsulated phase change thermostat on the premise of satisfying the requirements of road performance.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 郭健;;淺析差示掃描量熱法測定材料的比熱容[J];太原科技;2007年10期

本文編號：1835246