PEG改性高温煤焦油复掺石油沥青性能
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摘要
将聚乙二醇(PEG)与煤焦油在70～75℃搅拌共混改性后加入到基质沥青中,通过三大指标、傅里叶红外光谱仪、动态剪切流变实验和扫描差示量热实验对其改性性能进行分析。结果表明,改性沥青针入度和延度降低,软化点升高;根据Lambera Beer定律,定量分析峰面积,36. 12%的聚乙二醇分子参与改性去毒;改性沥青复数剪切模量和车辙因子随温度升高而减小,相位角随温度升高而增大,抗车辙能力较基质沥青改性沥青高温性能提高近10℃; 37. 5℃以上,10%～15%掺加量,改性效果最好; 37. 5℃以下,掺量越大,改性效果越好;改性后玻璃化温度升高不明显,掺加20%比例改性剂时,玻璃化转变温度最高提升2. 7℃。相比于基质沥青,改性沥青低温性能略有降低,但高温性能显著提高。
The polyethylene glycol was heated to 70 ～ 75 ℃ stirred blending with coal tar,then the modified coal tar was mixed with asphalt,they were carried out to analyze the modification performance by three indexes,Fourier transform infrared spectrometer,dynamic shear rheological experiment and scanning differential calorimetry experiment.The results showed that the penetration and ductility of modified asphalt decreased and the softening point increased; according to Lambera Beer law,quantitative analysis of peak area,36.12% of polyethylene glycol molecules involved in modified detoxification; the complex shear modulus and rutting factor of modified asphalt decrease with the increase of temperature,and the phase angle increases with the increase of temperature.The rutting resistance of the modified asphalt increases by nearly 10 ℃higher than that of the matrix modified asphalt; When the temperature is above 37.5 ℃,the modification effect of 10% ～ 15% was best.Under the temperature of 37.5 ℃,the better the dosage was,the better of modification effect was; the glass transition temperature of modified asphalt did not increase obviously,and the glass transition temperature was increased by 2.7 ℃ when the proportion of modifier was added.Compared with the asphalt,the low temperature performance of modified asphalt decreased slightly,but the high temperature performance of modified asphalt improved obviously.
The polyethylene glycol was heated to 70 ～ 75 ℃ stirred blending with coal tar,then the modified coal tar was mixed with asphalt,they were carried out to analyze the modification performance by three indexes,Fourier transform infrared spectrometer,dynamic shear rheological experiment and scanning differential calorimetry experiment.The results showed that the penetration and ductility of modified asphalt decreased and the softening point increased; according to Lambera Beer law,quantitative analysis of peak area,36.12% of polyethylene glycol molecules involved in modified detoxification; the complex shear modulus and rutting factor of modified asphalt decrease with the increase of temperature,and the phase angle increases with the increase of temperature.The rutting resistance of the modified asphalt increases by nearly 10 ℃higher than that of the matrix modified asphalt; When the temperature is above 37.5 ℃,the modification effect of 10% ～ 15% was best.Under the temperature of 37.5 ℃,the better the dosage was,the better of modification effect was; the glass transition temperature of modified asphalt did not increase obviously,and the glass transition temperature was increased by 2.7 ℃ when the proportion of modifier was added.Compared with the asphalt,the low temperature performance of modified asphalt decreased slightly,but the high temperature performance of modified asphalt improved obviously.
引文
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[2]何亮,黄晓明,马育,等.橡胶改性沥青储存稳定性试验研究[J].东南大学学报:自然科学版,2011,41(5):1086-1091.
[3]杨军.聚合物改性沥青[M].北京:化学工业出版社,2007.
[4]张争奇,李平,王秉纲. SBS改性沥青性能及老化的影响[J].公路,2005(9):150-155.
[5]黄新龙,孙殿成,王洪彬,等.高温煤焦油馏分油加氢改质生产清洁燃料研究[J].煤炭转化,2013,36(1):79-82.
[6]郭艳玲,胡俊鸽,周文涛,等.我国高温煤焦油深加工现状及发展趋势[J].现代化工,2014,34(8):11-14.
[7]程志宇,沈和平,熊柱松,等.高温煤焦油洗油馏分的新加工方案探讨[J].煤化工,2016,44(2):20-24.
[8]张丹,王磊,李惠萍.煤焦油中蒽、菲、咔唑的精制技术[J].现代化工,2016(5):158-161.
[9]张秋民,黄杨柳,关珺,等.煤焦油沥青中致癌多环芳烃含量气相色谱法测定研究[J].大连理工大学学报,2010,50(4):481-485.
[10]孙昱,廖志远,苏龙,等.溶剂效应对脱除煤沥青中3,4-苯并芘的影响[J].化工进展,2014,33(8):2211-2214.
[11] Zhang L F,Liu G,Wang Y G,et al. Modification of coal tar pitch with P-phthalaldehyde to reduce toxic PAH content[J]. Energy Sources Part A Recovery Utilization&Environmental Effects,2016,38(5):737-743.
[12]刘媛媛,宋真真,杨燕红,等.基于醛类交联剂的煤焦油沥青族组分改性石油沥青[J].燃料化学学报,2016,44(7):792-800.
[13]刘媛媛.基于醛类交联剂的煤焦油沥青改性石油沥青[D].西安:西北大学,2016.
[14]交通部公路科学研究所.公路工程沥青及沥青混合料试验规程[M].北京:人民交通出版社,1984.