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Tracing hydration feature of aluminophosphate cementitious materials by means of electrochemical impedance method

Dong, Biqin et al.

Construction & building materials. Volume 113 (2016, August); pp 997-1006 -- Elsevier Ltd

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  • Title:
    Tracing hydration feature of aluminophosphate cementitious materials by means of electrochemical impedance method
  • Author: Dong, Biqin;
    Zhang, Jianchao;
    Liu, Yuqing;
    Fang, Guohao;
    Ding, Zhu;
    Xing, Feng
  • Found In: Construction & building materials. Volume 113 (2016, August); pp 997-1006
  • Journal Title: Construction & building materials
  • Subjects: Building materials--Periodicals; Aluminophosphate cementitious materials--Hydration--Electrochemical impedance spectroscopy--Equivalent circuit model--Compressive strength; Dewey: 624.18
  • Rights: legaldeposit
  • Publication Details: Elsevier Ltd
  • Abstract: Highlights:

    Hydration feature of aluminophosphate cement paste is studied by electrochemical impedance method.

    A novel electrochemical equivalent model is proposed to explain the whole hydration procedure, and verified by XRD pattern.

    The relationship between electrochemical impedance parameter and compressive strength is discussed.

    Abstract:

    In this paper, electrochemical impedance spectroscopy (EIS) is adopted as a nondestructive testing method for tracing the hydration procedure of aluminophosphate cementitious (APC) materials. A newly proposed electrochemical model is used to explain the hydration related features. The experimental results show that the electrochemical impedance behavior of APC varies with the process of hydration, along with hydration time increasing, as the ion transport processes resistance (Rct1, the parameter of the electrochemical impedance model) increasing gradually. In addition, Rct1has a similar growth law with compressive strength of APC during whole hydration procedure. Moreover, Rct1and high-frequency semicircle form its Nyquist curve reduces gradually with water-cement ratio increasing; and after the contrastive investigation on different boric acid content of APC impedance spectroscopy, it can be obtained that Rct1need more time to reach steady with boric acid content increasing. The experimental results show that electrochemical impedance method is reasonable for tracing the hydration feature of APC materials.


  • Identifier: System Number: LDEAvdc_100069464139.0x000001; Journal ISSN: 0950-0618; 10.1016/j.conbuildmat.2016.03.072
  • Publication Date: 2016
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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