• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Liu, Fei (Liu, Fei.) | Pan, Baofeng (Pan, Baofeng.) | Cao, Peng (Cao, Peng.) | Zhou, Changjun (Zhou, Changjun.)

收录:

EI Scopus SCIE

摘要:

This study focused on the interfacial transition zone (ITZ) between magnesium phosphate cement (MPC) paste and Portland cement paste (PCP). Multi-scale analyses were conducted to explore bonding characteristics and interfacial shear strengths of the ITZ with an innovative composite specimen. Meanwhile, ITZ was investigated by the Nano-indentation test, the scanning electron microscope (SEM), and the energy-dispersive spectrometer (EDS). Based on the damage mechanics and the interface kinematics formula, the viscous behavior and friction behavior were coupled together for the first time to develop the constitutive relation of the interface damage. A finite element (FE) model of MPC-PCP interface shear strength was developed and conducted to validate the proposed constitutive relation of the interface damage. Sensitivity analysis of repair size was predicted by the effect of different sizes on shear strength. The 7d shear strength of the repair interface reached 5.2 MPa, which indicates that MPC has good bonding with PCP. Investigated by SEM/EDS analysis, the cracks appeared at 10 mu m away from PCP edge and the width at 6 h and 3d was around 3-5 mu m. According to the nano-indentation test, the elastic modulus varied greatly in the ITZ and the lowest value located 10 mu m away from the PCP side. Numerical results from FE models were found consistent with the experimental results, which validates the proposed constitutive relation of the interface damage. (C) 2020 Elsevier Ltd. All rights reserved.

关键词:

Interface damage model Interfacial transition zone Magnesium phosphate cement Portland cement paste Nano-indentation test

作者机构:

  • [ 1 ] [Liu, Fei]Dalian Univ Technol, Sch Transportat & Logist, 2 Linggong St, Dalian 116023, Peoples R China
  • [ 2 ] [Pan, Baofeng]Dalian Univ Technol, Sch Transportat & Logist, 2 Linggong St, Dalian 116023, Peoples R China
  • [ 3 ] [Zhou, Changjun]Dalian Univ Technol, Sch Transportat & Logist, 2 Linggong St, Dalian 116023, Peoples R China
  • [ 4 ] [Cao, Peng]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Zhou, Changjun]Dalian Univ Technol, Sch Transportat & Logist, 2 Linggong St, Dalian 116023, Peoples R China

查看成果更多字段

相关关键词:

来源 :

CONSTRUCTION AND BUILDING MATERIALS

ISSN: 0950-0618

年份: 2021

卷: 275

7 . 4 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:116

JCR分区:1

被引次数:

WoS核心集被引频次: 25

SCOPUS被引频次: 25

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 1

归属院系:

在线人数/总访问数:319/4971490
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司