Fracture response of cement-based composite with spherical glass aggregate exposed to high temperatures
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-06-01 |
| Journal | IOP Conference Series Materials Science and Engineering |
| Authors | Iva RozsypalovĂĄ, Ivana KumpovĂĄ, TomĂĄĹĄ Majda, ZbynÄk KerĹĄner, P Ĺ tancl |
| Institutions | Brno University of Technology, Czech Academy of Sciences, Institute of Theoretical and Applied Mechanics |
Abstract
Section titled âAbstractâAbstract This paper concerns an investigation into the effects of high temperatures acting on specimens made from specially designed fine-grained cement-based composite with spherical glass aggregate. The experimental programme was carried out on four sets of beam specimens with the dimensions 20 Ă 40 Ă 200 mm. The specimens were thermally loaded to pre-set temperatures of 100, 200 and 400 °C, after which these temperatures were maintained for 60 minutes (one of the sets contained three reference specimens which were placed in a laboratory at a temperature of 20 °C and were not exposed to heat). After the temperature loading had been performed, the specimens were left to cool down to ambient temperature. After that, fracture tests were used to determine the degree of damage caused to the specimens by temperature loading. Three-point bending tests were conducted on the previously loaded beam specimens, which were notched to provide them with an initial stress concentrator using a diamond blade saw before testing. The depth of the initial edge notch on the bottom side of the specimen was approximately 1/3 of the total specimen depth. The span length was 180 mm. Fracture response was evaluated via load versus deflection diagrams. The monitored parameters were modulus of elasticity, effective fracture toughness and specific fracture energy. Informative compressive strength values were also determined. Selected specimens were investigated using X-ray micro-tomography (micro-CT).
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 2013 - Behaviour of cement concrete at high temperature
- 2018 - Characterization of cement based composite exposed to high temperatures via ultrasonic pulse method [Crossref]
- **** - Rilem Determination of the fracture energy of mortar and concrete by means of three-point bending test on notched beams