Analysis on mechanism of explosive spalling resistance of aluminum powder on ladle corundum-based refractory castable
Source abstract
Abstract
Abstract The effect of the particle size (50–325 mesh) and content (0–0.1 wt%) of metallic aluminum powder on the explosive spalling resistance of corundum-based refractory castables were investigated in this study based on air permeability, pore size distribution, heat release, fracture energy and microstructural analyses. The experimental results show that the addition of Al powder significantly improves their explosive spalling resistance. As observed, the explosive spalling resistance of the castables was mainly influenced by the permeability mechanism and the fracture energy. Permeable paths were generated in the microstructure of the sample during the overlapping period between the curing process and the H2 gas forming one, derived from the Al–H2O reaction. The highest permeability level was obtained when 0.075 wt % of Al powder with size of 100 mesh was incorporated into the corundum-based refractory castables. At the same time, the fracture energy of the castable samples was increased accordingly.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fire effects on concrete materials · Advanced ceramic materials synthesis · Engineering and Material Science Research
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References (20)
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1. Correlations among processing parameters and porosity of a lightweight alumina10.1016/j.ceramint.2018.05.005 ↗
2. Properties and microstructures of lightweight alumina containing different types of nano-alumina10.1016/j.ceramint.2018.06.261 ↗
3. Microstructures of fire-damaged concrete
4. The effect of the addition of polypropylene fibres on the properties of corundum refractory concretes with a low cement content and an addition of aluminium phosphate10.1016/j.ceramint.2014.07.087 ↗
5. Cracks in concrete core due to fire or thermal heating shock
6. Modes of failure of concrete panels exposed to high temperatures10.1680/macr.1972.24.79.71 ↗
7. Fire behavior of high performance concrete made with silica fume at different moisture contents
8. Modelling the pressure dependence and the influence of added polymeric fibers on the permeability of refractory concretes10.1016/j.ceramint.2010.09.030 ↗
9. Polypropylene fibers and their effect on processing refractory castables10.1111/j.1744-7402.2007.02170.x ↗
10. Effect of dispersants, fine powders on aluminum-containing refractory castables
11. Aluminum-containing refractory castables, Part 1: evaluation of hydrogen-gas generation
12. Aluminum-containing refractory castables, Part 2: evaluation of drying performance
13. Reaction of aluminum powder with water in cement-containing refractory castables10.1016/j.jeurceramsoc.2004.07.004 ↗
14. Effect of fineness and dosage of aluminum powder on the properties of moist-cured aerated concrete10.1016/j.conbuildmat.2015.07.122 ↗
15. Corrosion resistance of metal powders for high-carbon-containing refractory castables with different binders
16. Effect of aluminum powder with different grain size on properties of alumina castables
17. Water corrosion resistance of metal powders for carbon-containing castables
18. Effects of magnesia and calcium aluminate cement on the hydration of aluminum powder in castables matrix
19. Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures10.1016/j.cemconres.2005.12.014 ↗
20. Fractal characteristics of pore structure of corundum-based castable