|
|
|
| Properties of Polyurethane-modified Asphalt Based on Castor Oil |
| XIA Lei1, ZHANG Hai-yan1, CAO Dong-wei1, GUO Yan-sheng2 |
1. Research Institute of Highway Ministry of Transport, Beijing 100088, China;
2. School of Chemical Engineering, China University of Petroleum, Qingdao Shandong, 266580, China |
|
|
|
|
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.
|
|
Received: 01 July 2017
|
|
Corresponding Authors:
XIA Lei
E-mail: xiall1990@126.com
|
|
|
|
[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]. |
| [1] |
LI Ning, MA Biao, LI Rui, SI Wei. Performance of Unbound Aggregate Materials under Single-stage and Multi-stage Loading Modes Based on Precision Unbounded Material Analyzer[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 1-12. |
| [2] |
XU Hai-liang, REN He-huan, HE Zhao-cai, HE Lian. Time-domain Analysis of Deformation Characteristics of Asphalt Concrete Pavement Considering Vehicle-pavement Coupled Effect[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 13-19. |
| [3] |
DU Jian-huan, AI Chang-fa, HUANG Chao, GUO Yu-jin, JIANG Yun-bing. Effect of Interfacial Water on the Fatigue Performance of Composite Asphalt Mixture Beams[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 1-7. |
| [4] |
YAO Guo-qiang, YAN Zhi-xin, LONG Zhe, ZHAI Ju-yun. Simulation Experimental Study on Shear Stress Distribution of Rock Slope Anchoring Interface[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 8-15. |
| [5] |
LIU Ze, HE Fan, HUANG Tian-qi, JIANG Mei-dong. Additional Earth Pressure of Retaining Wall Caused by Vehicle Load[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 16-23. |
| [6] |
QIU Xin, XU Jing-xian, TAO Jue-qiang, YANG Qing. Asphalt Pavement Icing Condition Criterion and SVM-based Prediction Analysis[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 1-9. |
|
|
|
|
2017, Vol. 11 
