摘要
为探究生活污泥在道路工程中的应用方式,研究并制备了生活污泥人造骨料,并将其应用于沥青混合料中。通过正交试验确定生活污泥人造骨料的最佳制备工艺,测试其物理性能,并通过X射线衍射(XRD)、扫描电镜(SEM)研究污泥骨料的矿物组成与微观结构,按30%替代率替换天然石料,研究污泥骨料对沥青混合料路用性能的影响。结果表明:在最佳制备工艺下,污泥骨料抗压强度为29.47 MPa,低于天然石料,吸水率为0.26%,表观密度为2.64/cm^(3);骨料表面有光滑的釉质层,坯体密实性好但内部矿物晶体排列散乱;与AC-13沥青混合料相比,污泥骨料沥青混合料的高温稳定性较好,但低温性能和水稳性能略低。研究结果对生活污泥的再利用和沥青混合料的发展有促进作用。
In order to explore the application of sewage sludge in road engineering,this paper prepares artificial aggregate of domestic sewage sludge and applies it to asphalt mixture.Firstly,the optimum preparation process of artificial aggregate of sewage sludge is determined by orthogonal tests,and its physical properties are tested.Then its mineral composition and microstructure are then studied by X-ray diffraction(XRD)and scanning electron microscope(SEM).Finally,the natural stone is replaced at a replacement rate of 30%to study the effect of sludge aggregate on the road performance of asphalt mixture.The results show that,under the optimum preparation process,the compressive strength of sludge aggregate is 29.47 MPa,which is lower than that of a natural stone.The water absorption rate is 0.26%and the apparent density is 2.64/cm^(3).There is a smooth enamel layer on the surface of the sludge aggregate,and the compactness of the green body is good,but the internal mineral crystal arrangement is scattered.Compared with AC-13 asphalt mixture,the sludge aggregate asphalt mixture has better high-temperature stability,but slightly lower low-temperature performance and water stability.The research results can promote the reuse of sewage sludge and the development of asphalt mixture.
作者
曹雪娟
吴兴驰
高豪
李小宇
CAO Xuejuan;WU Xingchi;GAO Hao;LI Xiaoyu(School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2023年第3期155-161,共7页
Journal of Chongqing University of Technology：Natural Science
基金
重庆市研究生联合培养基地建设项目(JDLHPYJD2018006)。
关键词
道路工程
污泥骨料
沥青混合料
路用性能
road engineering
sludge aggregate
asphalt mixture
pavement performance
