[1]颜可珍,陈明,胡玥.废胶粉/APAO复合改性沥青性能 [J].长安大学学报(自然科学版),2018,38(02):1-8.
 YAN Ke zhen,CHEN Ming,HU Yue.Performance of composite modified asphalt by waste rubber powder and amorphous poly alpha olefin[J].Journal of Chang’an University (Natural Science Edition),2018,38(02):1-8.
点击复制

废胶粉/APAO复合改性沥青性能
()
分享到:

长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第38卷
期数:
2018年02期
页码:
1-8
栏目:
道路工程
出版日期:
2018-03-31

文章信息/Info

Title:
Performance of composite modified asphalt by waste rubber powder and amorphous poly alpha olefin
作者:
颜可珍陈明胡玥
湖南大学 土木工程学院,湖南 长沙 410082
Author(s):
YAN Kezhen CHEN Ming HU Yue
College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China
关键词:
道路工程APAO复合改性沥青制备工艺
Keywords:
road egineering APAO composite modified asphalt preparation technique
分类号:
U414.1
文献标志码:
A
摘要:
为了研究废胶粉(WTR)与非晶态α烯烃共聚物(APAO)对沥青复合改性的效果以及其最优加工工艺。首先采用高速剪切法制备多组不同掺量的WTR/APAO复合改性沥青;然后测定WTR/APAO复合改性沥青的针入度、软化点、黏度、弹性恢复,同时进行了存储稳定性分析与荧光显微镜微观检测;最后通过正交试验确定WTR/APAO复合改性沥青最优加工工艺。研究结果表明:WTR与APAO的掺量(质量分数,下同)分别为15%与4%时,WTR/APAO复合改性沥青的针入度比基质沥青降低了36.8 mm,软化点增加了22.9 ℃,弹性恢复增加了67%,黏度(180 ℃)增加81%,且其各项指标均满足橡胶沥青评价指标要求;加入适量的WTR与APAO后基质沥青的高温性能和可恢复变形能力得到明显提高,WTR/APAO复合改性沥青具有较好的改性效果;与WTR单独改性相比,加入APAO能使针入度进一步减小,软化点、黏度与弹性恢复进一步增加,APAO的加入能进一步提升WTR的改性效果;加入4%的APAO后,WTR/APAO复合改性沥青比仅掺入15%的WTR改性沥青的软化点降低了3.3 ℃,APAO的加入能显著提高废胶粉改性沥青的存储稳定性,弥补了废胶粉改性沥青的不足;APAO不仅增进了WTR的分散程度,而且改善了WTR与沥青相的相容性。WTR/APAO复合改性沥青最优加工工艺基本参数为:先加入WTR,后加入APAO,控制剪切温度190 ℃,剪切时间90 min,剪切速度5 000 r/min。
Abstract:
In order to study the influence of waste rubber powder (WTR) and amorphous poly alpha olefin (APAO) on composite modified asphalt and its optimum processing technology, multiple groups of blending quantity of WTR/APAO composite modified asphalt were prepared by using highspeed shearing method at first, then the penetration, softening point, viscosity and elastic recovery of WTR/APAO composite modified asphalt were measured, and simultaneously, the storage stability analysis and microscopic examination of fluorescence microscope were carried out. Finally, the optimum processing technology of WTR/APAO composite modified asphalt was determined by orthogonal test. The results show that when the blending quantity of waste rubber powder and APAO (mass fraction, the same below) is 15% and 4%, respectively, the penetration of WTR/APAO composite modified asphalt is lower than that of matrix asphalt by 36.8 mm, the softening point increases by 22.9 ℃, the elastic recovery increases by 67%, and the viscosity (180 ℃) increases by 81%. And all indexes meet the requirements of the evaluation index of rubber asphalt. This indicates that after adding appropriate amount of WTR and APAO, high temperature performance and recoverable deformation ability of matrix asphalt are significantly improved, and WTR/APAO composite modified asphalt has better modification effect. Moreover, compared to WTR modification alone, the addition of APAO can result in a further decrease in penetration and a further increase in softening point, viscosity and elastic recovery, the addition of APAO can further enhance the effect of WTR modification alone. The storage stability experiment reveals that the softening point difference of WTR/APAO composite modified asphalt decreases by 3.3 ℃ compared to waste rubber powder modified asphalt with the blending quantity of 15% alone after adding 4% APAO, which proves that the addition of APAO can significantly improve the storage stability of the waste rubber powder modified asphalt and can make up for the deficiency of waste rubber powder modified asphalt. Fluorescence microscopy experiments also show that APAO not only enhances the dispersion of WTR, but also improves the compatibility of WTR with asphalt. The basic parameters of the optimal processing technology for WTR/APAO composite modified asphalt are that WTR is added before APAO, and shear temperature 190 ℃, the sheared time 90 min, and shear rate 5 000 r/min. 6 tabs, 7 figs, 26 refs.

相似文献/References:

[1]武建民,祝伟,马士让,等.应用加权密切值法评价基质沥青抗老化性能[J].长安大学学报(自然科学版),2012,32(01):0.
[2]张宜洛,袁中山.SMA混合料结构参数的影响因素[J].长安大学学报(自然科学版),2012,32(01):0.
[3]陈璟,袁万杰,郝培文,等.微观指标对沥青热稳定性能的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[4]周兴业,刘小滔,王旭东,等.基于轴载谱的沥青路面累计当量轴次换算[J].长安大学学报(自然科学版),2012,32(01):0.
[5]李祖仲,王伯禹,陈拴发,等.轴载对复合式路面应力吸收层荷载应力的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[6]关博文,刘开平,陈拴发,等.水镁石纤维路面混凝土路用性能[J].长安大学学报(自然科学版),2012,32(01):0.
[7]翁效林,王玮,张留俊,等.拓宽路基荷载下管桩复合地基沉降变形模式[J].长安大学学报(自然科学版),2012,32(01):0.
[8]穆柯,王选仓,柳志军,等.基于非饱和渗流原理的路基含水率预估[J].长安大学学报(自然科学版),2012,32(01):0.
[9]李振霞,陈渊召.不同类型半刚性基层材料性能的试验与分析[J].长安大学学报(自然科学版),2012,32(01):0.
[10]马 骉,马 晋,周宇鹏.沥青混合料降温收缩断裂特性[J].长安大学学报(自然科学版),2012,32(03):1.
 MA Biao,MA Jin,ZHOU Yu-peng.Cooling shrinkage fracture characteristic of asphalt mixture[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):1.

备注/Memo

备注/Memo:
收稿日期:20170927
基金项目:〖HTSS〗国家自然科学基金项目(50808077,51278188);湖南省普通高校青年骨干教师培养计划项目
作者简介:〖HTSS〗颜可珍(1975),男,湖南桃江人,教授,博士研究生导师,Email:yankz2004@163.com。
更新日期/Last Update: 2018-04-03