集料酸性组成及温度对沥青/集料黏附性的影响  

Influence of aggregate acidic composition and temperature on asphalt/aggregate adhesion

作　　者：朱振祥 魏慧 樊亮 王林 李永振 Zhu Zhenxiang;Wei Hui;Fan Liang;Wang Lin;Li Yongzhen(Shandong High-Speed Co.,Ltd.,Ji'nan 250014,Shandong,China;Shandong Transportation Research Institute,Ji'nan 250100,Shandong,China)

机构地区：[1]山东高速股份有限公司,山东济南250014 [2]山东省交通科学研究院,山东济南250100

出　　处：《中国胶粘剂》2024年第3期62-69,共8页China Adhesives

基　　金：山东省交通科技计划项目(2020B45)。

摘　　要：为了定量表征集料中的酸性组成对沥青/集料黏附性的影响,首先通过采用模拟矿物和红外光谱方法研究了酸性成分对沥青的吸附规律。然后选用3种石油沥青、5种集料考察了实际酸性成分对黏附性的影响模式及使用温度对黏附性的影响特点。研究结果表明:实际矿物集料中的酸性组分SiO_(2)含量、SiO_(2)+Al_(2)O_(3)合计含量均能与黏附性表征参数-剥落率呈现Logistic函数关系。当SiO_(2)含量小于50%,或者SiO_(2)+Al_(2)O_(3)含量小于63%时,集料表面沥青的剥落率一般在5%以下,为第一稳定区;当SiO_(2)含量介于50%~73%,或者SiO_(2)+Al_(2)O_(3)含量介于63%~87%时,沥青在集料表面的剥落随酸性成分含量提高而加快,为黏附性敏感区,沥青黏附性等级可以从4级快速衰减为3级、2级;当SiO_(2)含量大于73%,或者SiO_(2)+Al_(2)O_(3)含量大于87%之后,沥青黏附性等级都为2级或1级之下,为第二稳定区。在一些低温气候分区内,按照普通的沥青混合料设计方法或配合适当的抗剥落措施,可以正常利用花岗岩等酸性集料。In order to quantitatively characterize the influence of acidic composition in aggregate on asphalt/aggregate adhesion,the adsorption law of acidic component on asphalt was studied first by simulated mineral and infrared spectroscopy.Then,three types of petroleum asphalt and five types of aggregate were selected to investigate the influence mode of actual acidic components on adhesion,as well as the influence characteristics of application temperature on adhesion.The research results showed that the SiO_(2)content of the acidic component and the total content of SiO_(2)+Al_(2)O_(3)in actual mineral aggregate could exhibit the Logistic function relationship with the adhesion characterization parameter-spalling rate.When the SiO_(2)content was less than 50%,or the content of SiO_(2)+Al_(2)O_(3)was less than 63%,the spalling rate of asphalt on the aggregate surface was generally less than 5%,which was the first stable zone.When the SiO_(2)content was between 50%-73%,or the content of SiO_(2)+Al_(2)O_(3)was between63%-87%,the spalling of asphalt on the aggregate surface accelerated with the increase of acidic component content,which was a sensitive zone for adhesion.The adhesion grade of asphalt could rapidly decay from level 4 to level 3 or 2.When the SiO_(2)content was greater than 73%,or the content of SiO_(2)+Al_(2)O_(3)was greater than 87%,the adhesion grade of asphalt was below level 2 or level 1,which was the second stable zone.In some low-temperature climate areas,acidic aggregates such as granite could be utilized normally by using ordinary asphalt mixture design methods or with appropriate anti-spalling measures.

关 键 词：沥青黏附性 集料矿物组成 酸性成分 影响规律 

分 类 号：U416.217[交通运输工程—道路与铁道工程] TQ430.4[化学工程]