Hello,
Bottom ash is part of the non-combustible residue of combustion in a furnace or incinerator. In an industrial context, it usually refers to coal combustion and comprises traces of combustibles embedded in forming clinkers and sticking to hot side walls of a coal-burning furnace during its operation. The portion of the ash that escapes up the chimney or stack is, however, referred to as fly ash. The clinkers fall by themselves into the bottom hopper of a coal-burning furnace and are cooled. The above portion of the ash is referred to as bottom ash too.
since both have almost the same chemical properties, it can be used for production of geopolymer concrete.
https://doi.org/10.1016/j.conbuildmat.2016.02.135
Dear sir,
pl see this paper.
http://www.sciencedirect.com/science/article/pii/S030438940900168X
Thank you very much for your interest and provide a guidance for us. Best wishes.
Fly ash constituents are the best fit for the development of alkali activated concrete such as geopolymer concrete due to the high contents of siliceous and alumina particles. A chemical analysis of bottom ash should be done before its usage.
Particle size of bottom ash does not allow it to use as binder. If you can grind it before use it can be used like fly ash. But it cannot give the same performance as compared with fly ash. If you use bıttom ash as sand withot grinding this way is another type of usage of bottom ash.
Thank you very much Prof. Dr. İsa Yüksel. We will consider this during our laboratory application.
You can replace some amount of fly ash with bottom ash by optimizing experimental conditions.
Although using fly ash in geoopolymer concretes is more common, they are several published papers on the use of bottom ash. The main issue with bottom ash is their large particles size, which reduces the reactivity of this material. I hope you find these two articles helpful.
https://core.ac.uk/download/pdf/11851650.pdf?repositoryId=409
http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29MT.1943-5533.0000560
Slag can be partially added to produce bottom ash based geopolymer concrete
- Badges
- Science topic