摘要
为提高临时便道装配式混凝土路面板的循环利用率及承载能力,文章将超高性能混凝土(UHPC)与3D打印技术相结合,通过室内力学试验与现场温度监测试验,分析3D打印面板、现浇面板作为临时便道装配式混凝土路面板的路用性能。结果表明,3D打印UHPC混凝土虽能提高面板的耐久性与环保性,但其面板温度变形大于C40混凝土现浇面板,抗温性能受金属纤维掺料影响。通过对标准板板中、板边、板角应变的监测分析,发现3D打印UHPC面板应力水平普遍大于现浇C40路面板;对比分析3D打印异形板与标准版平均应力水平发现,尺寸较小的异形板应力值普遍低于标准板,相对于设计弯拉强度,异形板件板边应力更小,显示出更高的使用潜力。
In order to improve the recycling rate and bearing capacity of prefabricated concrete pavement slabs for temporary sidewalks,this paper combines ultra-high performance concrete(UHPC)with 3D printing technology,and analyzes the road performance of 3D printed panels and cast-in-situ panels as prefabricated concrete pavement slabs for temporary sidewalks through indoor mechanical tests and on-site temperature monitoring tests.The test results show that although 3D printed UHPC concrete can improve the durability and environmental protection of the panel,the temperature deformation of the panel is greater than that of the C40 concrete cast-in-place panel,and the temperature resistance is affected by the metal fiber addition.Through the monitoring of the strain in the middle,edge and corner of the standard board,it is analyzed that the stress level of the 3D printed UHPC panel is generally greater than that of the cast-in-place C40 road panel.And comparing and analyzing the average stress levels of 3D printed special-shaped plate with the standard version,it is found that the stress value of the smaller-sized special-shaped plate is generally lower than that of the standard plate,and the stress of the edge of the special-shaped plate is smaller than that of the design tensile strength,showing higher use potential.
作者
李苗
王凯薪
张秀钰
赵瑞欣
李哲
LI Miao;WANG Kaixin;ZHANG Xiuyu;ZHAO Ruixin;LI Zhe(Zhongjiao Road and Bridge Construction Co.,Ltd.,Beijing 100000,China;General Contracting Branch of CCCC Road and Bridge Construction Co.,Ltd.,Beijing 100000,China;Chang'an University,Xi'an Shaanxi 710064,China)
出处
《交通节能与环保》
2024年第3期22-27,共6页
Transport Energy Conservation & Environmental Protection
