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Creep of polymer concrete in the nonlinear region

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Mechanics of Composite Materials Aims and scope

Abstract

Two polyester-based polymer concretes with various volume content of diabase as an extender and aggregate are tested in creep under compression at different stress levels. The phenomenological and structural approaches are both used to analyze the experimental data. Common features of changes in the instantaneous and creep compliances are clarified, and a phenomenological creep model which accounts for the changes in the instantaneous compliance and in the retardation spectrum depending on the stress level is developed. It is shown that the model can be used to describe the experimental results of stress relaxation and creep under repeated loading. Modeling of the composite structure and subsequent solution of the optimization problem confirm the possibility of the existence of an interphase layer more compliant than the binder. A direct correlation between the interphase volume content and the instantaneous compliance of the composite is revealed. It is found that the distinction in nonlinearity of the viscoelastic behavior of the two polymer concretes under investigation can be due to the difference in their porosity.

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Authors and Affiliations

  1. Institute of Polymer Mechanics, University of Latvia, LV-1006, Riga, Latvia

    K. Aniskevich & J. Jansons

  2. Central Laboratory of Physicochemical Mechanics, Sofia, Bulgaria

    J. Khristova

Authors
  1. K. Aniskevich
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  2. J. Khristova
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  3. J. Jansons
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Additional information

Submitted to the 11th International Conference on Mechanics of Composite Materials (Riga, June 11–15, 2000.)

Translated from Mekhanika Kompozitnykh Materialov, Vol. 36, No. 2, pp. 147–164, 2000.

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Aniskevich, K., Khristova, J. & Jansons, J. Creep of polymer concrete in the nonlinear region. Mech Compos Mater 36, 85–96 (2000). https://doi.org/10.1007/BF02681826

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  • DOI: https://doi.org/10.1007/BF02681826

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