Effect of Aggregate Shape on Mechanical Properties for Ercc Based on a Highly Detailed Simulation Method

作     者：Zhao, Qingxin Min, Qiaoling Zhang, Mengxi Li, Mingchao Zhang, Jinrui 

作者机构：State Key Llaboratory of Metastable Materials Science and Technology Yanshan University Oinhuangdao 066000 China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin300350 China 

出 版 物：《SSRN》 

年 卷 期：2023年

核心收录：

主　　题：Roller compacted concrete 

摘      要：Electrically conductive roller-compacted concrete (ERCC) is a novel functional material with self-heating ability, which can be applied to solve problems of low efficiency of artificial snow removal and deicing on expressway and airport runway, and difficult temperature control of dam structures. This study analyzed the strength performance experiment and mesoscale simulation of ERCC. Aimed at the core sample formed by rolling construction technology from the large ERCC specimen, the macroscopic test of mechanical properties and the mesoscopic test of X-ray computed tomography (XCT) were carried out. Based on the experimental results, the mechanical properties of ERCC with different aggregate shapes were analyzed by the highly detailed simulation method, and a mesoscale simulation model for real aggregate with different sphericity for ERCC was developed. The result demonstrates that the ERCC forming quality of rolling construction technology is positive with compressive strength of 22.85 MPa, splitting strength of 1.72 MPa, elastic modulus of 23.7 GPa. The simplified spherical method adopted in the traditional method for mesoscale simulation analysis underestimates the strength of concrete, leading to the necessity to analyze the mechanical properties of concrete with real aggregate according to engineering practice. Furthermore, when the strength of the mortar and interface transition zone (ITZ) is constant, reducing aggregate sphericity can improve the mechanical properties of ERCC;Therefore, the crushed artificial aggregate is suggested for rolling construction of ERCC in engineering. The results are in accordance with the statistical laws of the field statistical data in engineering practice. © 2023, The Authors. All rights reserved.