硅烷改性钛石膏沥青胶浆性能研究  

Investigation of the Characteristics of Silane-modified Titanium Gypsum Asphalt Mortar

作　　者：董营营 苏纪壮 张朝 魏毛元 张惠勤 王凯 DONG Yingying;SU Jizhuang;ZHANG Zhao;WEI Maoyuan;ZHANG Huiqin;WANG Kai(Shandong Hi-Speed Group Sichuan Leyi Highway Co.,Ltd.,Chengdu 610041,China;Shandong Hi-Speed Engineering Test Co.,Ltd.,Jinan 250002,China;The Research Center of Bulk Solid Waste Materials Recycled Using in Transportation Field,Jinan 250002,China)

机构地区：[1]山东高速集团四川乐宜公路有限公司,成都610041 [2]山东高速工程检测有限公司,济南250002 [3]大宗固废材料在交通领域行业循环利用行业研发中心,济南250002

出　　处：《森林工程》2025年第1期185-194,共10页Forest Engineering

基　　金：山东省重点研发计划(2020CXGC011405)。

摘　　要：为降低钛石膏堆积带来的环境问题,同时缓解道路材料短缺现状,采用钛石膏和硅烷偶联剂处理后的钛石膏部分或全部代替石灰岩矿粉,研究钛石膏和改性钛石膏对沥青胶浆常规性能和流变性能的影响。首先通过激光粒度仪和扫描电子显微镜分析钛石膏、改性钛石膏和石灰岩矿粉的粒度分布情况及微观形貌。然后制备不同钛石膏和改性钛石膏掺量的沥青胶浆,采用常规试验方法、温度扫描试验、频率扫描试验、多重应力蠕变恢复(mutiple stress creep recovery,MSCR)试验、线性振幅扫描(linear amplitude sweep,LAS)试验和弯曲梁流变(bending beam rheometer,BBR)试验测试沥青胶浆的三大指标(针入度、延度和软化点)、高温流变性能、抗疲劳性能和低温流变性能。结果表明,钛石膏和改性钛石膏的粒度范围更广,表面更为粗糙;钛石膏和改性钛石膏的加入降低了沥青胶浆的延度、针入度、不可恢复蠕变柔量(Jnr)、疲劳寿命(N_(f))、蠕变速率(m)和相位角(δ),软化点、复数模量(G^(*))、弹性恢复率(R)和蠕变劲度模量(S)有所提高,即高温性能有所提高,低温性能和疲劳性能有所下降。相同温度下,改性钛石膏的高温性能和弹性恢复指标要优于钛石膏,低温性能有所降低。研究证实使用钛石膏进行沥青混合料生产的可行性,为钛石膏的资源化利用开拓方向。In order to lessen the environmental issues caused by the accumulation of titanium gypsum and to also alleviate the cur-rent situation of road material shortage,titanium gypsum and silane coupling agent-treated titanium gypsum were used to partially or completely replace limestone mineral powder.Additionally,the effects of titanium gypsum and modified titanium gypsum on the con-ventional and rheological properties of asphalt mastic were investigated.First,a laser particle size meter and a scanning electron mi-croscope were used to examine the micro-morphology and particle size distribution of titanium gypsum,modified titanium gypsum,and limestone mineral powder.Subsequently,asphalt mortar containing varying amounts of titanium gypsum and modified titanium gyp-sum dosage was prepared.The asphalt mortar′s three main indicators(penetration,ductility,and softening point),as well as its high temperature and low temperature rheological performances,fatigue resistance,were tested using conventional testing methods,tem-perature scanning test,frequency scanning test,multiple stress creep recovery test(MSCR),linear amplitude scanning test(LAS),and bending beam rheological test(BBR).The findings indicated that:titanium gypsum and modified titanium gypsum had a wider particle size range and a rougher surface.The addition of titanium gypsum and modified titanium gypsum decreased the asphalt mor-tar′s ductility,penetration,unrecoverable creep flexibility(Jnr),fatigue life(N_(f)),creep rate(m) and phase angle(δ),while the softening point,complex modulus(G*),resilience(R) and stiffness modulus(S) were increased.In other words,performance at high temperatures was enhanced while low temperatures and weariness were decreased.The low-temperature performance was de-creased and the high-temperature performance and elastic recovery indexes of modified titanium gypsum outperformed those of tita-nium gypsum at the same temperature.The determination of the viability of utilizing titanium gypsum in the creation of asphalt mix-tures pr

关 键 词：钛石膏 沥青胶浆 改性钛石膏 矿粉 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]