欢迎访问《建筑材料学报》编辑部网站！

引用本文:	雷俊安,郑南翔,董善真.长期老化对沥青表面能及其与集料黏附性的影响[J].建筑材料学报,2021,24(2):393-398

【打印本页】【下载PDF全文】【查看/发表评论】【EndNote】【RefMan】【BibTex】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 280次下载 23次	码上扫一扫！
分享到：微信更多字体:加大+\|默认\|缩小-
长期老化对沥青表面能及其与集料黏附性的影响
雷俊安¹, 郑南翔¹, 董善真²
1.长安大学公路学院,陕西西安710064;2.中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

摘要:

为了研究长期老化对沥青表面能及其与集料黏附性的影响,选取基质沥青（BA）、苯乙烯丁二烯苯乙烯嵌段共聚物（SBS）改性沥青(SBS MA)、橡胶沥青（RA）、高黏沥青（HVA）4种沥青和石灰岩、玄武岩、辉绿岩3种岩性集料,通过接触角试验和表面能理论计算，分析了长期老化前后不同类型沥青的表面能及其与不同集料的黏附功变化情况.结果表明：长期老化增大了沥青与水的接触角,提高了沥青的疏水性能,老化前后其接触角大小为BA>SBS MA>RA>HVA;长期老化降低了沥青的表面能及其与集料的黏附性,老化前后其表面能和黏附功大小为HVA＞RA＞SBS MA＞BA;长期老化后,BA、SBS MA、RA、HVA的表面能分别降低了198%、743%、647%、322%,除BA黏附功变化不大外，SBS MA、RA、HVA的黏附功平均降低了371%、313%、201%,长期老化对SBS改性沥青的影响最为明显.

关键词: 长期老化接触角表面能黏附性

DOI：103969/j.issn.1007 9629202102023

分类号:

基金项目:国家自然科学基金资助项目（51308061）

Effect of Long Term Aging on Surface Energy of Asphalt and Its Adhesion to Aggregate

LEI Jun'an¹, ZHENG Nanxiang¹, DONG Shanzhen²

1.Highway school, Changan University, Xian 710064, China;2.Power China Kunming Engineering Co., Ltd., Kunming 650051, China

Abstract:

In order to study the effect of long term aging on the surface energy of asphalt and its adhesion to aggregate, base asphalt(BA), styrene butadiene styrene(SBS) modified asphalt(SBS MA), rubber asphalt(RA), high viscosity asphalt(HVA), and three kinds of lithologic aggregates, namely limestone, basalt and diabase were chosen. Based on the contact angle test and surface energy calculation, the surface energy of asphalt, the adhesion work with aggregate before and after long term aging were analyzed. The results show that long term aging increases the contact angle between asphalt and water, improves the hydrophobicity of asphalt. The contact angle before and after aging is BA>SBS MA>RA>HVA. Long term aging reduces the surface energy of asphalt and its adhesion to aggregate, and the surface energy and adhesion work before and after aging are HVA>RA>SBS MA>BA. After long term aging, the surface energies of the four asphalts, BA, SBS MA, RA and HVA, were reduced by 198%, 743%, 647%, and 322%, respectively. Except for the base asphalt, the adhesion work of SBS MA, RA and HVA decreased by 371%, 313%, 201% on average. Long term aging has the most obvious effect on SBS modified asphalt.

Key words: long term aging contact angle surface energy adhesion