蓖麻油基聚氨酯改性沥青的性能研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (663 KB) HTML ()
输出: BibTeX | EndNote (RIS)

摘要 To develop a new type of modified asphalt, castor oil-contained asphalt is obtained with green renewable castor oil instead of petroleum-based polyols. The second monomer-liquefied methylene diphenyl diisocyanate (MDI) is gradually added to a pitch system with shearing, and castor oil-based polyurethane (PU)-modified asphalt is prepared. The dosages of castor oil and second monomer MDI are calculated with isocyanate index R (—NCO/—OH)=1.8, and the modified asphalt with 10%-30% content of castor oil-based PU is synthesized. The performance of the modified asphalt is characterized through a conventional experiment. Experiment results show that the modifier in the asphalt is dispersed evenly, and the high-and low-temperature performance of the castor oil-based PU-modified asphalt is improved. The high-temperature grade of the asphalt is determined by performing the original grade test and thin film oven test on samples. On the basis of the high-temperature grade, the high-temperature performance of different asphalt samples after aging is analyzed and evaluated via a multiple stress creep recovery test. Test results show that the creep compliance of the modified asphalt is reduced significantly, and the recovery rate is increased compared with that of base asphalt. Increased elasticity and stiffening are achieved. With the increase in modifier dosage, creep compliance declines and the recovery rate increases simultaneously. The modification effect is also improved.

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	夏磊
	张海燕
	曹东伟
	郭燕生

关键词 ： road engineering, modified asphalt, DSR, polyurethane, creep recovery, rheological property, castor oil

Abstract：To develop a new type of modified asphalt, castor oil-contained asphalt is obtained with green renewable castor oil instead of petroleum-based polyols. The second monomer-liquefied methylene diphenyl diisocyanate (MDI) is gradually added to a pitch system with shearing, and castor oil-based polyurethane (PU)-modified asphalt is prepared. The dosages of castor oil and second monomer MDI are calculated with isocyanate index R (—NCO/—OH)=1.8, and the modified asphalt with 10%-30% content of castor oil-based PU is synthesized. The performance of the modified asphalt is characterized through a conventional experiment. Experiment results show that the modifier in the asphalt is dispersed evenly, and the high-and low-temperature performance of the castor oil-based PU-modified asphalt is improved. The high-temperature grade of the asphalt is determined by performing the original grade test and thin film oven test on samples. On the basis of the high-temperature grade, the high-temperature performance of different asphalt samples after aging is analyzed and evaluated via a multiple stress creep recovery test. Test results show that the creep compliance of the modified asphalt is reduced significantly, and the recovery rate is increased compared with that of base asphalt. Increased elasticity and stiffening are achieved. With the increase in modifier dosage, creep compliance declines and the recovery rate increases simultaneously. The modification effect is also improved.

Key words： road engineering modified asphalt DSR polyurethane creep recovery rheological property castor oil

收稿日期: 2017-07-01

通讯作者: XIA Lei E-mail: xiall1990@126.com

引用本文:

夏磊, 张海燕, 曹东伟, 郭燕生. 蓖麻油基聚氨酯改性沥青的性能研究[J]. Journal of Highway and Transportation Research and Development, 2017, 11(4): 15-21.
XIA Lei, ZHANG Hai-yan, CAO Dong-wei, GUO Yan-sheng. Properties of Polyurethane-modified Asphalt Based on Castor Oil. Journal of Highway and Transportation Research and Development, 2017, 11(4): 15-21.

链接本文:

http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2017/V11/I4/15

[1] LIU Yi-jun. Polyurethane Resin and its Application[M]. Beijing:Chemical Industry Press, 2011.(in Chinese)
[2] ZHANG Hao, TU Song, SHENG Ji-tai, et al. A kind of High Temperature Anti Rutting Modifier Based on Road Asphalt Polyurethane. China Patent:CN103102706A[P]. 2013.05.15.
[3] LI Lu, SHENG Xing-yue, HAO Zeng-heng. A Compound Modified Asphalt and Its Preparation Method. China Patent:CN103232717A[P].2013.08.07.
[4] ZHAI Hong-jin, YING Jun, ZHENG Lei. A Method for Preparation of Polyurethane Modified Asphalt[P]. China Patent:CN102850506A, 2013.01.02.
[5] GAN Hou-lei, YI Chang-hai, JIN Xue, et al. Study on Polyurethane Complexes Based on Castor Oil[J]. Adhesive,2008, 29(2):11-13.(in Chinese)
[6] JTG E20-2011, Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering[S].(in Chinese)
[7] AASHTO TP 70-10, Standard Method of Test for Multiple Stress Creep Recovery (Mscr) Test of Asphalt Binder Using a Dynamic Shear Rheometer (DSR)[S].
[8] BUKOWSKI J.The Multiple Stress Creep Recovery Procedure, FHWA-HIF-11-038[R]. Washington, D.C.:Federal Highway Administration of United States Department of Transportation, 2011.
[9] FENG Zhong-liang, WANG Rui-qiang, CAO Rong-ji. Study on High Temperature Performance of Asphalt by Repeated Creep Test[J]. Chinese and Foreign Highway, 2007, 27(1):181-183.(in Chinese)
[10] ZHANG Xiao-ning, MENG Yong-jun, ZOU Gui-1ian.High-temperature Index of Modified Asphalt Based on Repeated Creep[J]. Joumal of South China University of Technology:Natural Science Edition, 2008,36(2):23-27.(in Chinese)
[11] ZHANG H Y, WU X W, CAO D W, et al. Effect of Linear Low Density-Polyethylene Grafted with Maleic Anhydride (LLDPE-g-MAH) on Properties of High Density-Polyethylene/Styrene-Butadiene-Styrene(HDPE/SBS) Modified Asphalt[J].Construction and Building Mterials, 2013,47:192-198.
[12] D6690-06a, Standard Specification for Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements[S].
[13] D5893-04, Standard Specification for Cold Applied, Single Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements[S].