无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (3): 125-130.doi: 10.19964/j.issn.1006-4990.2023-0265

• 环境·健康·安全 • 上一篇    下一篇

有机改性硫酸钙晶须在沥青改性中的应用

陈凤1(), 冯康1, 李铭1, 沈豪杰1, 田承涛1,2, 唐远1(), 李智力1, 何东升1   

  1. 1.武汉工程大学资源与安全工程学院,湖北 武汉 430073
    2.湖北三宁化工股份有限公司,湖北 宜昌 443200
  • 收稿日期:2023-05-11 出版日期:2024-03-10 发布日期:2024-03-14
  • 通讯作者: 唐远(1990— ),男,博士,副教授,主要从事工业固废处置与资源化利用研究;E-mail:yuan.tang@wit.edu.cn
  • 作者简介:陈凤(2000— ),女,研究方向为工业固废处置与资源化利用;E-mail:3167146853@qq.com
  • 基金资助:
    国家级大学生创新创业训练计划项目(202210490008);武汉工程大学校长基金项目(XZJJ2021166);湖北省高等学校优秀中青年科技创新团队计划项目(T2021006);云南省磷资源技术创新中心项目(202305AK340002-4)

Application of organically modified calcium sulfate whiskers in asphalt modification

CHEN Feng1(), FENG Kang1, LI Ming1, SHEN Haojie1, TIAN Chengtao1,2, TANG Yuan1(), LI Zhili1, HE Dongsheng1   

  1. 1.School of Resources & Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, China
    2.Hubei Sanning Chemical Industry Co. , Ltd. , Yichang 443200, China
  • Received:2023-05-11 Published:2024-03-10 Online:2024-03-14

摘要:

为了获得力学性能更好的改性沥青,从而改善传统基质沥青路面性能,采用以磷石膏为原料制备的有机改性硫酸钙晶须对沥青进行改性,通过材料制备、分析检测及混合料试验,研究了所制备的有机改性硫酸钙晶须对改性沥青三大指标、表观黏度和高温性能的影响,探究了所制备的不同沥青混合料的路用性能。结果表明:有机改性剂主要以化学吸附的形式作用在硫酸钙晶须表面,经组合有机改性剂改性处理的晶须材料与沥青更好地相容,有机改性硫酸钙晶须的添加,一定程度上增强了沥青与晶须黏结强度,提高了沥青的高温稳定性,但其低温性能有所下降;且马歇尔试验、冻融劈裂试验及车辙试验结果,进一步验证了有机改性硫酸钙晶须改性沥青混合料的水稳定性和高温稳定性均较好,因此以磷石膏为原料制备的有机改性硫酸钙晶须改性沥青的路用性能更佳。

关键词: 磷石膏, 有机改性硫酸钙晶须, 改性沥青, 路用性能

Abstract:

To obtain the modified asphalt with better mechanical properties and improve the pavement performance of traditional matrix asphalt,the application of organically modified calcium sulfate whiskers(CSW),prepared from phosphogypsum,in asphalt modification were systematically studied.Through the materials preparation,analysis and testing,as well as mixture testing,changes of the three main indexes,apparent viscosity,and high-temperature performance of asphalt before and after modification using phosphogypsum and organically modified CSW were analyzed.Furthermore,the pavement performance of different bitumen mixtures was explored.The results indicated that the organic modifiers were mainly acted on the surface of CSW in the form of chemical adsorption.The whisker materials modified with combined organic modifiers were more compatible with asphalt.The introduction of organically modified CSW enhanced the bonding strength between asphalt and whiskers to a certain extent and improved the high-temperature stability,however,its low-temperature performance had been relatively reduced.The results were confirmed furthermore by the Marshall stability tests,freeze-thaw splitting tests,and wheel tracking tests.The water stability and high-temperature stability of the modified asphalt mixtures by phosphogypsum or organically modified CSW were better than those in matrix asphalt,and the pavement performance of the asphalt modified by organically modified CSW became better.

Key words: phosphogypsum, organically modified CSW, modified asphalt, pavement performance

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