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- W3035846827 abstract "Thanks to its porous structure the autoclaved aerated concrete has excellent thermal insulation properties. The production of this building material is carried out in two main steps. At first calcium hydroxide reacts with aluminum powder. This reaction releases hydrogen which creates the porous structure. Secondly lime reacts with siliceous components under hydrothermal conditions. This reaction forms crystalline calcium hydrosilicates which represent a binder component in the material. Focus of this paper is to study the degree of crystallization of calcium hydrosilicates depending on the quantity and fineness of the admixture of the waste foundry sand. This material was tested in three different values of specific surface. The influence of granularity of the waste foundry sand on the microstructure and physical-mechanical properties of the autoclaved aerated concrete was monitored. At the same time, the influence primary filler substitution by foundry sand was also observed. The substitution was realized in amounts of 10%, 30% and 50%. As the final step the influence of the waste foundry sand admixture on the autoclaved aerated concrete porous structure was evaluated. The microstructure was analyzed by X-ray diffraction. Obtained values show that admixture of waste foundry sand has positive effect on the crystallisation of calcium hydosilicate phases. Substitution of primary filler by waste foundry sand is possible up to 50%. With a higher amount of substitution, the higher values of compressive strength of autoclaved aerated concrete were monitored." @default.
- W3035846827 created "2020-06-25" @default.
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- W3035846827 date "2020-06-01" @default.
- W3035846827 modified "2023-09-24" @default.
- W3035846827 title "The Influence of the Waste Foundry Sand on the Microstructure and the Physico-Mechanical Properties of Autoclaved Aerated Concrete" @default.
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- W3035846827 doi "https://doi.org/10.4028/www.scientific.net/msf.998.293" @default.
- W3035846827 hasPublicationYear "2020" @default.
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