Effects of loading rates on concrete compressive strength
| Autor: | Aiman Irfan Abdullah |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 1144:012033 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/1144/1/012033 |
| Popis: | Concrete structures are subjected to loadings which can be static or dynamic and in most cases, both. Deeper understanding on how concrete behaves to different modes of loading needs to be assessed, particularly the rate; and to study its effects, a property of concrete such as its compressive strength requires to be examined in relation to the changes in the loading rates. Different loading conditions or rates can alter how cracks in concrete are formed in terms of crack velocity and crack intensity in regions where stress equals to the applied pressure. However, various studies have shown contradicting results with respect to how varying loading rates may affect the compressive strength of concrete. This research conducted 5 different concrete mixes to study the effect of loading rate on compressive strength of concrete. Concentric uniaxial loading, in terms of pressure as opposed to displacement, was loaded to the hardened concrete cube specimens at different loading rates increasing constantly at 0.2 MPa/s and 0.4 MPa/s which are within the standard limits. Moreover, loading rates beyond the extremes were also subjected in one of the mix design for study and analysis purposes. Results showed that there is a relatively minor relationship between the rate of loading and the strength in terms of compression for both specimen sizes in which the trend indicates that as the loading rate is increased, the compressive strength also increases but with minimal deviation in the magnitudes of the strengths. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|