Fracture properties of fly ash concrete
Abstract eng: Fly ash has widely been considered as a potential alternative to cement due to its various advantages, e.g., environmentally-friendly, durable, low heat generation during hydration and high longterm strength. However, it is not very clear how fly ash could change the fracture property of concrete, mainly, fracture toughness/energy. This paper attempts to determine the fracture energy of concrete with different fly ash concentrations by closed-loop three-point bending test. Full load-deflection curves are obtained and fracture energy is calculated for each of the mix designs. A quantitative relationship is then established to describe the change of fracture energy of concrete as the fly ash is increased. A finite element model is also developed to simulate the mechanical performance of the three-point bending test of the fly ash concrete. Results from the experiment and the numerical model are compared and a good agreement is achieved. It has been found that as the content of fly ash increases, the fracture energy decreases and the decrease in fracture energy is slow for fly ash inclusion up to 40% but fast after 40%.
Contributors:
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
guest ::
