Optimizing the Mechanical Properties of Ultra-High-Performance Fibre-Reinforced Concrete to Increase Its Resistance to Projectile Impact
| Autor: | Anna L. Mina, Konstantinos G. Trezos, Michael F. Petrou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
indirect tensile strength
Technology Materials science Young's modulus Bending Article stress–strain curves symbols.namesake Flexural strength General Materials Science Composite material ultra-high-performance concrete Microscopy QC120-168.85 direct tensile strength Stress–strain curve QH201-278.5 Superplasticizer modulus of elasticity Compression (physics) compressive strength Engineering (General). Civil engineering (General) Poisson’s ratio Poisson's ratio TK1-9971 Compressive strength Descriptive and experimental mechanics symbols finite elements ultra-high-performance fibre-reinforced concrete Electrical engineering. Electronics. Nuclear engineering TA1-2040 |
| Zdroj: | Materials, Vol 14, Iss 5098, p 5098 (2021) Materials Volume 14 Issue 17 |
| ISSN: | 1996-1944 |
| Popis: | This study describes an extensive experimental investigation of various mechanical properties of Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC). The scope is to achieve high strength and ductile behaviour, hence providing optimal resistance to projectile impact. Eight different mixtures were produced and tested, three mixtures of Ultra-High-Performance Concrete (UHPC) and five mixtures of UHPFRC, by changing the amount and length of the steel fibres, the quantity of the superplasticizer, and the water to binder (w/b) ratio. Full stress–strain curves from compression, direct tension, and flexural tests were obtained from one batch of each mixture to examine the influence of the above parameters on the mechanical properties. The Poisson’s ratio and modulus of elasticity in compression and direct tension were measured. Additionally, a factor was determined to convert the cubic strength to cylindrical. Based on the test results, the mixture with high volume (6%) and a combination of two lengths of steel fibres (3% each), water to binder ratio of 0.16% and 6.1% of superplasticizer to binder ratio exhibited the highest strength and presented great deformability in the plastic region. A numerical simulation developed using ABAQUS was capable of capturing very well the experimental three-point bending response of the UHPFRC best-performed mixture. |
| Databáze: | OpenAIRE |
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