ANALYSIS OF MECHANICAL PROPERTIES OF HYDROTHERMALLY CURED HIGH STRENGTH CEMENT MATRIX FOR TEXTILE REINFORCED CONCRETE

Authors

  • Ondřej Holčapek Czech Technical University in Prague
  • Filip Vogel Czech Technical University in Prague, Faculty of Civil Engineering, Experimental Centre
  • Petr Konvalinka Czech Technical University in Prague, Faculty of Civil Engineering, Experimental Centre

DOI:

https://doi.org/10.14311/AP.2015.55.0313

Keywords:

compressive strength, flexural strength, properties increase, dynamic modulus, steel fibres, hydrothermal curing, boundary conditions

Abstract

The main objective of this article is to describe the influence of hydrothermal curing conditions in an autoclave device (different pressure and temperature), which took place at various ages of a fresh mixture (cement matrix – CM, and fibre-reinforced cement matrix – FRCM), on textile reinforced concrete production. The positive influence of autoclaving has been evaluated through the results of physical and mechanical testing – compressive strength, flexural strength, bulk density and dynamic modulus of elasticity, which have been measured on specimens with the following dimensions: 40×40×160mm3. In addition, it has been found that increasing the pressure and temperature resulted in higher values of measured characteristics. The results indicate that the most suitable surrounding conditions are 0.6MPa, and 165 °C at the age of 21 hours; the final compressive strength of cement matrix is 134.3MPa and its flexural strength is 25.9MPa (standard cured samples achieve 114.6MPa and 15.7MPa). Hydrothermal curing is even more effective for cement matrix reinforced by steel fibres (for example, the compressive strength can reach 177.5MPa, while laboratory-cured samples achieve a compressive strength of 108.5MPa).

Downloads

Download data is not yet available.

Author Biography

  • Ondřej Holčapek, Czech Technical University in Prague
    Czech Technical University in Prague, Faculty of Civil Engineering, Experimental Centre

Downloads

Published

2015-10-31

Issue

Vol. 55 No. 5 (2015)

Section

Articles

License

Authors who publish with this journal agree to the following terms:

1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

4. ddd

How to Cite

Holčapek, O., Vogel, F., & Konvalinka, P. (2015). ANALYSIS OF MECHANICAL PROPERTIES OF HYDROTHERMALLY CURED HIGH STRENGTH CEMENT MATRIX FOR TEXTILE REINFORCED CONCRETE. Acta Polytechnica, 55(5), 313-318. https://doi.org/10.14311/AP.2015.55.0313