钢渣粉/聚酯纤维沥青混合料水稳定性研究  

Effect of Erosion on Water Stability of Permeable Fiber Asphalt Mixture

作　　者：张抒幻 吴金荣[1,2] 张涛 ZHANG Shu-huan;WU Jin-rong;ZHANG Tao(Engineering Research Center of Underground Mine Construction,Ministry of Education,Anhui University of Science and Technology,Huainan 232001,China;School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学矿山地下工程教育部工程研究中心,淮南232001 [2]安徽理工大学土木建筑学院,淮南232001

出　　处：《科学技术与工程》2023年第2期785-793,共9页Science Technology and Engineering

基　　金：安徽省高校自然科学重点研究项目(KJ2017A096)。

摘　　要：为了实现钢渣粉在沥青路面中的可持续利用,同时结合河南省冬季冰雪天气下路面的除冰情况,研究了掺有聚酯纤维与钢渣粉沥青混合料的水稳定性。制备4种聚酯纤维掺量(0、0.3%、0.4%、0.5%)AC-13沥青混合料开展复盐(掺量配比为NaCl∶CaCl2∶CH2COONa=1∶1∶2)冻融循环劈裂试验,结果表明聚酯纤维掺量为0.4%时,沥青混合料水稳定最好;在最佳纤维掺量下制备5种替代率(0、25%、50%、75%、100%)钢渣粉沥青混合料,采用冻融劈裂抗拉强度比(freeze-thaw splitting tensile strength ratio,TSR)确定最佳钢渣粉替代率为75%,混合料水稳定性最佳;通过冻融腐蚀因子K评价沥青混合料的抗侵蚀性能,结果表明:聚酯纤维/钢渣粉沥青混合料的抗侵蚀性能最强,聚酯纤维沥青混合料次之,普通石灰岩沥青混合料最弱。通过电镜扫描(scanning electron microscope,SEM)、X射线衍射(X-ray diffraction,XRD)技术探索钢渣粉/聚酯纤维沥青混合料界面黏附作用的改性机理。微观分析表明:掺量为0.4%的聚酯纤维形成的纤维网状结构以及沥青、钢渣粉(75%的替代率)和矿粉三者存在界面能量作用可以很好地改善沥青混合料的水稳定性。To realize the sustainable utilization of steel slag powder in asphalt pavement,combined with the deicing situation of Henan Province in winter snow and ice weather,the water stability of asphalt mixture mixed with polyester fiber and steel slag powder was studied.Four kinds of polyester fiber mixtures(0,0.3%,0.4%,0.5%)AC-13 asphalt mixture were prepared to carry out the freeze-thaw splitting test of mixed salt(NaCl∶CaCl2∶CH2COONa=1∶1∶2).The results show that the asphalt mixture has the best water stability when the polyester fiber content is 0.4%.Five kinds of steel slag powder asphalt mixtures with substitution rates(0,25%,50%,75%,100%)are prepared under the optimal fiber content.The optimal steel slag powder substitution rate is determined as 75%by the splitting tensile strength ratio(TSR),and the water stability of the mixture is the best.The anti-erosion performance of asphalt mixtures was evaluated by freeze-thaw corrosion factor K.The results show that the anti-erosion performance of polyester fiber/steel slag powder asphalt mixture is the strongest,the polyester fiber asphalt mixture is second,and the common limestone asphalt mixture is the weakest.Scanning electron microscopy(SEM)and X-ray diffraction(XRD)were used to explore the modification mechanism of interface adhesion between steel slag powder and polyester fiber asphalt mixture.Microanalysis shows that the fiber network structure of the polyester fiber,and the interaction of interfacial energy among asphalt,steel slag powder and mineral powder(75%substitution rate),can improve the water stability of asphalt mixture well.

关 键 词：聚酯纤维 钢渣粉 水稳定性 电镜扫描(scanning electron microscope SEM) X射线衍射(X-ray diffraction XRD) 

分 类 号：U414[交通运输工程—道路与铁道工程]