| Issue |
MATEC Web Conf.
Volume 322, 2020
MATBUD’2020 – Scientific-Technical Conference: E-mobility, Sustainable Materials and Technologies
|
|
|---|---|---|
| Article Number | 01015 | |
| Number of page(s) | 9 | |
| Section | E-mobility, Sustainable Materials and Technologies | |
| DOI | https://doi.org/10.1051/matecconf/202032201015 | |
| Published online | 14 October 2020 | |
Non-traditional Approach to the Evaluation of the Freeze-thaw Resistance of Concrete based on the Fracture Tests
1 Brno University of Technology, FCE, Veveří 331/95, Brno, Czech Republic
2 Federal University of Rio de Janeiro, COPPE/PEC, Rio de Janeiro, Brazil
* Corresponding author: barbara.kucharczykova@vutbr.cz
The paper deals with a pilot study focused on the freeze-thaw (F-T) resistance of concrete. A non-traditional approach to the evaluation of the F-T resistance of concrete based on the determination of the fracture parameters is presented in the paper. Three types of specimens were used in the experimental program – prisms with edge and Chevron notch, and cylinders with the Chevron notch. Three sets of specimens of each shape were tested in total. The reference set was stored in the water until the time of testing. Another two sets of specimens were subjected to 50 and 100 freeze-thaw tests, respectively. One F-T cycle consisted of 4 hours freezing in the air at temperature -18 °C and 2 hours thawing in the water at temperature +20 °C. Based on the results, it can be stated that the values of fracture energy are proportional to the area of the ligament. This finding was observed for all tested sets – non-frost and frost attacked. The values of modulus of elasticity and fracture toughness are influenced more by the geometry and also by the changes of the specimens’ stiffness due to the exposition to the F-T cycles.
© The Authors, published by EDP Sciences, 2020
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