TY - JOUR

T1 - A review on cementitious self-healing and the potential of phase-field methods for modeling crack-closing and fracture recovery

AU - Yang, Sha

AU - Aldakheel, Fadi

AU - Caggiano, Antonio

AU - Wriggers, Peter

AU - Koenders, Eddie

N1 - Funding Information: This research was funded by National German DFG organization: (i) under project number 387065993 titled ?Form filling ability of fresh concrete: A time and hydration dependent approach?, as part of DFG SPP 2005 program ?Opus Fluidum Futurum?Rheology of reactive, multiscale, multiphase construction materials?; and (ii) under project number 426807554 titled ?Experimentally supported multi-scale Reactive Transport modeling of cementitious materials under Acid attack (ExpeRTa)?.

PY - 2020/11/21

Y1 - 2020/11/21

N2 - Improving the durability and sustainability of concrete structures has been driving the enormous number of research papers on self-healing mechanisms that have been published in the past decades. The vast developments of computer science significantly contributed to this and enhanced the various possibilities numerical simulations can offer to predict the entire service life, with emphasis on crack development and cementitious self-healing. The aim of this paper is to review the currently available literature on numerical methods for cementitious self-healing and fracture development using Phase-Field (PF) methods. The PF method is a computational method that has been frequently used for modeling and predicting the evolution of meso-and microstructural morphology of cementitious materials. It uses a set of conservative and non-conservative field variables to describe the phase evolutions. Unlike traditional sharp interface models, these field variables are continuous in the interfacial region, which is typical for PF methods. The present study first summarizes the various principles of self-healing mechanisms for cementitious materials, followed by the application of PF methods for simulating microscopic phase transformations. Then, a review on the various PF approaches for precipitation reaction and fracture mechanisms is reported, where the final section addresses potential key issues that may be considered in future developments of self-healing models. This also includes unified, combined and coupled multi-field models, which allow a comprehensive simulation of self-healing processes in cementitious materials.

AB - Improving the durability and sustainability of concrete structures has been driving the enormous number of research papers on self-healing mechanisms that have been published in the past decades. The vast developments of computer science significantly contributed to this and enhanced the various possibilities numerical simulations can offer to predict the entire service life, with emphasis on crack development and cementitious self-healing. The aim of this paper is to review the currently available literature on numerical methods for cementitious self-healing and fracture development using Phase-Field (PF) methods. The PF method is a computational method that has been frequently used for modeling and predicting the evolution of meso-and microstructural morphology of cementitious materials. It uses a set of conservative and non-conservative field variables to describe the phase evolutions. Unlike traditional sharp interface models, these field variables are continuous in the interfacial region, which is typical for PF methods. The present study first summarizes the various principles of self-healing mechanisms for cementitious materials, followed by the application of PF methods for simulating microscopic phase transformations. Then, a review on the various PF approaches for precipitation reaction and fracture mechanisms is reported, where the final section addresses potential key issues that may be considered in future developments of self-healing models. This also includes unified, combined and coupled multi-field models, which allow a comprehensive simulation of self-healing processes in cementitious materials.

KW - Cement-based systems

KW - Fracture

KW - Phase-field

KW - Precipitation

KW - Reaction

KW - Self-healing

KW - Transport

UR - http://www.scopus.com/inward/record.url?scp=85096616660&partnerID=8YFLogxK

U2 - 10.3390/ma13225265

DO - 10.3390/ma13225265

M3 - Review article

AN - SCOPUS:85096616660

VL - 13

SP - 1

EP - 31

JO - Materials

JF - Materials

SN - 1996-1944

IS - 22

M1 - 5265

ER -