%0 Journal Article
%T 温度作用下UHPC + AC复合试件的变形规律<br>Deformation Law of UHPC + AC Composite Specimens under the Effect of Temperature
%A 毛惺
%A 聂忆华
%A 钟世雄
%A 刘福财
%A 肖敏
%J Hans Journal of Civil Engineering
%P 737-745
%@ 2326-3466
%D 2023
%I Hans Publishing
%R 10.12677/HJCE.2023.126083
%X 基于道路及相关材料发展现状，提出UHPC + AC复合式路面，制作UHPC + AC复合试件并进行温度变形试验。研究分析发现复合试件AC层与UHPC层在20℃至？20℃低温下收缩，20℃至60℃高温下膨胀，温度变形集中在试验前2 h；对于试件温度收缩系数：AC层 &gt; UHPC层，低温环境 &gt; 高温环境；给出复合试件变形结果Ls，实验时间t与试件原始尺寸L的拟合公式，可以较好地预测复合试件温度变形结果；而在？20℃ + 60℃温度循环条件下，在每轮温度循环后，AC层与UHPC层均产生残余变形，逐渐收缩，且AC层收缩量大于UHPC层。同时试验未发现复合试件产生由温度变形差异导致的裂缝，表明复合试件温度协调变形符合路面使用要求。研究结论为UHPC + AC复合式路面的设计和维护提供理论依据。<br />
Based on the development status of road and related materials, UHPC + AC composite pavement is proposed, UHPC + AC composite specimens are made and temperature deformation tests are conducted. The study and analysis found that the composite specimen AC layer and UHPC layer shrink at 20？C~20？C low temperature, expand at 20？C~60？C high temperature, and the temperature deformation is concentrated in the first 2 h of the test; for the temperature shrinkage coefficient of the specimen: AC layer &gt; UHPC layer, low-temperature environment &gt; high-temperature environment. The fitting formula between the deformation results Ls of the composite specimen, the experimental time t, and the original size L of the specimen can effectively predict the temperature deformation result of the composite specimen; and under the temperature cycling condition of ？20？C + 60？C, after each round of temperature cycling, the AC layer and UHPC layer both produce residual deformation and gradually shrink, and the shrinkage of AC layer is larger than that of UHPC layer. At the same time, the test did not find that the composite specimen produced cracks caused by the difference in temperature deformation, indicating that the temperature-coordinated deformation of the composite specimen met the requirements of pavement use. The research conclusions provide theoretical basis for the design and maintenance of UHPC + AC composite pavement.
%K UHPC + AC，复合试件，温度，变形规律<br>UHPC + AC
%K Composite Specimens
%K Temperature
%K Deformation Law
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=67155