TY - JOUR
T1 - Characterisation of temporal variations of alkali-activated slag cement property using microstructure features and electrical responses
AU - Zhu, Xiaohong
AU - Li, Qing
AU - Yang, Kai
AU - Song, Mu
AU - Zhang, Zhilu
AU - Magee, Bryan
AU - Yang, Changhui
AU - Basheer, Muhammed
N1 - Funding Information:
The experiments described in this paper were carried out at Chongqing University. The authors acknowledge the following institutions for providing facilities and the financial support: National Natural Science Foundation of China (NO. 51878102), Open funds from Shenzhen University, State Key Laboratory of High Performance Civil Engineering Materials, Chongqing Jiaotong University, Venture and innovation support program for Chongqing oversea returns. In addition, support provided from University of Leeds and Ulster University during analysis of data and preparation of this paper are also highly appreciated.
Funding Information:
The experiments described in this paper were carried out at Chongqing University. The authors acknowledge the following institutions for providing facilities and the financial support: National Natural Science Foundation of China (NO. 51878102 ), Open funds from Shenzhen University , State Key Laboratory of High Performance Civil Engineering Materials , Chongqing Jiaotong University , Venture and innovation support program for Chongqing oversea returns. In addition, support provided from University of Leeds and Ulster University during analysis of data and preparation of this paper are also highly appreciated.
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/20
Y1 - 2020/11/20
N2 - Relatively few studies currently exist concerning temporal variation of the overall performance of alkali-activated slag (AAS) cement; a topic essential for quality control in practice. This study uses microstructural characteristics and electrical responses to reflect performance variation of AAS cement. To achieve this, four key performance parameters were assessed, pore formation factor, chloride transport coefficient, permeability coefficient and compressive strength. Classical theories used for PC-based materials were applied to estimate the performance of AAS paste. It is found that the formation factor of AAS can be assessed by combining bulk conductivity and pore solution conductivity and the permeation properties of AAS cement cannot be reliably assessed by the Katz-Thomoson (KT) model, while the Millington-Quirk (MQ) model works better. To assess the relationship between compressive strength and permeable porosity, the Balshin and Ryshkevitch equations performed best in terms of describing the relationship between these two parameters. Meanwhile, AAS cement is more sensitive to the mix proportions and additional care is needed to ensure its quality. It is the first time to use electrical response to predict the chloride transport coefficients of AAS cement, which would provide a powerful tool for its quality control and service life prediction.
AB - Relatively few studies currently exist concerning temporal variation of the overall performance of alkali-activated slag (AAS) cement; a topic essential for quality control in practice. This study uses microstructural characteristics and electrical responses to reflect performance variation of AAS cement. To achieve this, four key performance parameters were assessed, pore formation factor, chloride transport coefficient, permeability coefficient and compressive strength. Classical theories used for PC-based materials were applied to estimate the performance of AAS paste. It is found that the formation factor of AAS can be assessed by combining bulk conductivity and pore solution conductivity and the permeation properties of AAS cement cannot be reliably assessed by the Katz-Thomoson (KT) model, while the Millington-Quirk (MQ) model works better. To assess the relationship between compressive strength and permeable porosity, the Balshin and Ryshkevitch equations performed best in terms of describing the relationship between these two parameters. Meanwhile, AAS cement is more sensitive to the mix proportions and additional care is needed to ensure its quality. It is the first time to use electrical response to predict the chloride transport coefficients of AAS cement, which would provide a powerful tool for its quality control and service life prediction.
KW - Alkali-activated slag cement
KW - Electrical responses
KW - Microstructure features
KW - Permeation properties
KW - Pore formation factor
KW - Strength development
UR - https://www.sciencedirect.com/science/article/pii/S0950061820318894?dgcid=coauthor
UR - http://www.scopus.com/inward/record.url?scp=85087197702&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.119884
DO - 10.1016/j.conbuildmat.2020.119884
M3 - Article
VL - 261
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 119884
ER -