BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响

doi:10.19491/j.issn.1001-9278.2024.08.015

中国塑料 ›› 2024, Vol. 38 ›› Issue (8): 94-99.DOI: 10.19491/j.issn.1001-9278.2024.08.015

BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响

徐传浩¹(), 石振武¹(), 池波²()

^1.东北林业大学土木与交通学院，哈尔滨 150040
^2.龙建路桥股份有限公司，哈尔滨 150009

收稿日期:2023-12-08 出版日期:2024-08-26 发布日期:2024-08-19
通讯作者: 石振武（1963—），男，教授，研究方向为工程经济与项目管理，shizhenwu@126.com
池波（1987—）男，高级工程师，研究方向为科技管理与路桥技术，c13796637774@163.com
E-mail:xuchuanhao369@163.com;shizhenwu@126.com;c13796637774@163.com
作者简介:徐传浩（2000—），男，硕士研究生，研究方向为废旧塑料在道路沥青当中的应用，xuchuanhao369@163.com
基金资助:
龙建路桥股份有限公司科技项目(230000100004258220004)

Effect of BMH type warm mixture on fatigue properties of waste plastic/SBS composite modified asphalt

XU Chuanhao¹(), SHI Zhenwu¹(), CHI Bo²()

^1.Faculty of Civil Engineering and Transportation，Northeast Forestry University，Harbin 150040，China
^2.Longjian Road and Bridge Company Limited，Harbin 150009，China

Received:2023-12-08 Online:2024-08-26 Published:2024-08-19
Contact: SHI Zhenwu, CHI Bo E-mail:xuchuanhao369@163.com;shizhenwu@126.com;c13796637774@163.com

摘要/Abstract

摘要：

借助动态剪切流变仪（DSR）温度扫描试验、时间扫描试验、线性振幅扫描试验以及红外试验对废塑/热塑性丁苯橡胶（SBS）复合改性沥青的抗疲劳性能进行了分析。结果显示：路陆邦（BMH）型温拌剂可以降低废塑/SBS改性沥青的疲劳因子，降低耗散能，提高抗疲劳性能，且以1.2 %（质量分数，下同）的掺量表现最佳。归一化动态模量衰减至初始模量50 %的指标值（ $N f 50$ ）和刚度比（ $S$ ）×循环加载次数（ $N$ ）均可以用来表征温拌废塑/SBS复合改性沥青的疲劳寿命，通过 $S$ × $N$ 指标来表征的疲劳寿命总体上低于 $N f 50$ ，1.2 %掺量改善抗疲劳性能最优，1.4 %掺量改善效果不升反降。BMH型温拌剂对于老化后沥青试样疲劳性能的改善效果更明显；无论是老化还是未老化的沥青试样，温拌剂的改善效果在高应变水平环境中更为突出；抗疲劳性能以1.2 %掺量BMH型温拌剂样品最优。BMH型温拌剂能够通过降低羰基及亚砜基含量来提高沥青抗疲劳性能，对老化后的沥青提升效果更明显，这与线性振幅扫描试验结果一致。

关键词: 废塑/热塑性丁苯橡胶复合改性沥青, 温拌技术, 时间扫描, 线性振幅扫描, 疲劳性能

Abstract:

In this paper， the fatigue resistance of waste plastic/butadiene styrene block polymer（SBS） composite modified asphalt was analyzed by temperature scanning test， time scan test， linear amplitude scanning test and infrared test using a dynamic shear rheometer. The results indicated that BMH warm mixture could reduce the fatigue factor， reduce the dissipation energy， and improve the fatigue resistance of waste plastic/SBS modified asphalt， and the best performance was at a content of 1.2 wt%. Both normalized dynamic modulus decays to an index value of 50 % of the initial modulus and stiffness ratio （ $S$ ）×times of cyclic loading （ $N$ ） can be used to characterize the fatigue life of warm⁃mix waste plastic/SBS composite modified asphalt， and the fatigue life characterized by $S$ × $N$ index was generally lower than that of $N f 50$ ， the fatigue resistance improved by 1.2 wt% content was the best， and the improvement effect of 1.4 wt% content did not increase but decreased. BMH warm mix had a more obvious effect on the fatigue performance of aging asphalt samples. Regardless of whether it is an aged asphalt sample or an unaged asphalt sample， the improvement effect of warm mix was more prominent in the environment with high strain level. The fatigue resistance of 1.2 wt% BMH mixture sample was the best. BMH warm mix could improve the fatigue resistance of asphalt by reducing the content of carbonyl and sulfoxide groups， and the effect on the aging asphalt was more obvious， which was consistent with the test results of linear amplitude scanning.

Key words: waste plastic/butadiene styrene block polymer composite modified asphalt, warm mix technology, time scanning, linear amplitude scanning, fatigue performance

中图分类号:

TQ320.9

徐传浩, 石振武, 池波. BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响[J]. 中国塑料, 2024, 38(8): 94-99.

XU Chuanhao, SHI Zhenwu, CHI Bo. Effect of BMH type warm mixture on fatigue properties of waste plastic/SBS composite modified asphalt[J]. China Plastics, 2024, 38(8): 94-99.

图/表 12

图1 疲劳因子随温度的变化

Fig.1 Changes of fatigue factor with temperature

图2 G*随加载次数的变化

Fig.2 Changes of G* with number of the loads

图3 S×N随加载次数的变化

Fig.3 Changes of S×N with number of the loads

图4 老化前沥青的应力⁃应变曲线

Fig.4 Stress⁃strain curves of the asphalt before aging

图5 老化后沥青的应力⁃应变曲线

Fig.5 Stress⁃strain curves of the asphalt after aging

图6 原样沥青损伤特征曲线

Fig.6 Damage characteristic curves of the original asphalt samples

图7 短期老化后沥青试样损伤特征曲线

Fig.7 Damage characteristic curves of the asphalt samples after short⁃term aging

沥青试样	$A 35$	$B$	$C 1$	$C 2$
PB	6 050 023 956	-4.889	0.035 69	0.431 12
1PB	16 760 170 917	-4.816	0.033 61	0.421 97
1.2PB	24 607 287 579	-4.702	0.032 01	0.412 58
1.4PB	16 524 369 836	-4.758	0.032 59	0.421 33

沥青试样	$A 35$	$B$	$C 1$	$C 2$
PB	6 050 023 956	-4.889	0.035 69	0.431 12
1PB	16 760 170 917	-4.816	0.033 61	0.421 97
1.2PB	24 607 287 579	-4.702	0.032 01	0.412 58
1.4PB	16 524 369 836	-4.758	0.032 59	0.421 33

表1 原样沥青的VECD参数值

Tab.1 VECD parameter of the original asphalt

表1 原样沥青的VECD参数值

Tab.1 VECD parameter of the original asphalt

沥青试样	$A 35$	$B$	$C 1$	$C 2$
PB⁃R	476 531 950	-4.978	0.036 14	0.457 54
1PB⁃R	971 816 690	-4.918	0.034 07	0.449 61
1.2PB⁃R	2 257 795 297	-4.864	0.033 29	0.434 23
1.4PB⁃R	1 530 437 725	-4.876	0.033 51	0.441 32

沥青试样	$A 35$	$B$	$C 1$	$C 2$
PB⁃R	476 531 950	-4.978	0.036 14	0.457 54
1PB⁃R	971 816 690	-4.918	0.034 07	0.449 61
1.2PB⁃R	2 257 795 297	-4.864	0.033 29	0.434 23
1.4PB⁃R	1 530 437 725	-4.876	0.033 51	0.441 32

表2 短期老化后沥青的VECD参数值

Tab.2 VECD parameter of the asphalt after short⁃term aging

表2 短期老化后沥青的VECD参数值

Tab.2 VECD parameter of the asphalt after short⁃term aging

图8 不同应变水平下原样沥青的疲劳寿命

Fig.8 Fatigue life of the original asphalt under different strain levels

图9 不同应变水平下短期老化沥青的疲劳寿命

Fig.9 Fatigue life of the short⁃term aging asphalt under different strain levels

图10 老化前后温拌沥青的FTIR谱图

Fig.10 FTIR spectra of the warm⁃mixed asphalt before and after aging

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BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响

Effect of BMH type warm mixture on fatigue properties of waste plastic/SBS composite modified asphalt

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