本文選題：硅酸鹽基礦粉　切入點：硅烷偶聯(lián)劑　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：硅酸鹽基礦粉是一種用途廣泛的無機(jī)填料,已經(jīng)被應(yīng)用到各個領(lǐng)域。在瀝青混凝土制備過程中,硅酸鹽基礦粉的加入可以改善油石比,同時提高瀝青路面的防水性能。硅酸鹽基礦粉是一種親水性的非金屬礦物填料,與瀝青存在界面差異,使其難以在瀝青中均勻分散。因此,需要對硅酸鹽基礦粉進(jìn)行表面改性,改善礦粉表面的物化性質(zhì),從而提高瀝青的綜合性能。本文開展的主要工作如下:選擇一種目前常用的硅酸鹽基礦粉,利用XRD、紅外光譜、XPS等手段測定原礦粉性能。經(jīng)測試選用的硅酸鹽基礦粉為片沸石,屬于架狀硅酸鹽的一種。礦粉的特征峰是位于3456cm-1和1626cm-1處的Si-OH的伸縮振動吸收峰和彎曲振動吸收峰。利用干法直接噴涂工藝改性原礦粉,選用的改性劑為KH-560、KH-570、辛基三乙氧基硅烷和丙基三乙氧基硅烷,改性后利用吸油值及接觸角等方法進(jìn)行預(yù)評價,選擇出最佳改性劑為直鏈的丙基和辛基,接觸角分別達(dá)到110°和115°。利用紅外光譜、拉曼光譜,分析改性前后表面結(jié)構(gòu)的變化,確定改性機(jī)理及改性效果。通過控制變量法,采用加熱改性和直接噴涂改性兩種工藝,確定每種方法的最佳改性工藝。實驗表明兩種方法都能很好地實現(xiàn)改性效果,接觸角均可以達(dá)到115°。加熱改性時間大大縮少,但是需要大量水和乙醇,以及大型專用設(shè)備。因此,本實驗選擇直接噴涂改性工藝。通過凍融劈裂實驗來檢測試件的水穩(wěn)定性,實驗表明改性后的試件,凍融劈裂強(qiáng)度比TSR值由61%升到84%,改性后的TSR值大于規(guī)范要求的75%;通過車轍實驗來檢測試件的抗高溫性能,改性后的試件的凍穩(wěn)定性DS值由4846次/mm升到6300次/mm,大于規(guī)范要求的3000次/mm。應(yīng)用性能評價驗證了礦粉的改性效果。
[Abstract]:Silicate based mineral powder is a widely used inorganic filler, which has been used in various fields. In the process of preparing asphalt concrete, the addition of silicate based mineral powder can improve the ratio of oil to stone. At the same time, the waterproof performance of asphalt pavement is improved. Silicate based mineral powder is a kind of hydrophilic nonmetallic mineral filler, which has interface difference with asphalt, which makes it difficult to disperse evenly in asphalt. Therefore, it is necessary to modify the surface of silicate based mineral powder. The main work of this paper is as follows: select a common silicate based mineral powder, The properties of raw ore powder were determined by means of XRD, IR spectroscopy and XPS. The silicate based ore powder was selected as flake zeolite. The characteristic peak of ore powder is the stretching vibration absorption peak and bending vibration absorption peak of Si-OH located at 3456cm-1 and 1626cm-1. The modifiers selected were KH-560 KH-570, octyl triethoxy silane and propyl triethoxy silane. After modification, oil absorption value and contact angle were used for pre-evaluation. The best modifiers were straight chain propyl group and octyl group. The contact angle reached 110 擄and 115 擄respectively. The changes of surface structure before and after modification were analyzed by IR and Raman spectra, and the modification mechanism and effect were determined. The experiment shows that both methods can achieve the modification effect very well, and the contact angle can reach 115 擄. The heating modification time is greatly reduced, but a large amount of water and ethanol are needed, as well as large scale special equipment. In this experiment, direct spray modification technology was selected. The water stability of the samples was tested by freeze-thaw splitting experiment. The ratio of freeze-thaw splitting strength to TSR was increased from 61% to 84%, and the modified TSR value was higher than that required by the specification. The high temperature resistance of the specimens was tested by rutting test. The frozen stability DS value of the modified sample was increased from 4846 times / mm to 6300 times / mm, which was higher than the 3000 times / m ~ (m) required by the specification. The modified effect of ore powder was verified by performance evaluation.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU528

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本文編號：1662378