Introduction to Refractory Concretes
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Depending on the additives used, refractory concretes acquire the necessary properties: fire resistance, porosity, heat resistance, maximum application temperature, etc.
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This paper presents an experimental study on the performance of shielding refractory concretes containing new types of cements for use in the radiation protection technology.
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This article gives a brief introduction to refractory concretes.
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Studies have shown that under normal curing conditions at one-day age, refractory concretes based on an iron phosphate binder acquire strength sufficient for stripping, transportation, and installation of structures.
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A fundamental difference between the grain size composition of cement-free refractory concretes (CFRC) from low- and ultra-low-cement concretes is presence within their composition of up to 2 – 3 % nanoparticles (<0.
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The performance of exposure tests on heat and scale resistant steels and refractory concretes in flue gases from miscanthus as well as adapted K 2 CO 3 crucible tests allow first conclusions to be drawn about the resistance of the materials investigated in flue gases from biogenic fuels.
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Among modern refractory concretes (MRC), those with low cement content (LCC) where CAC = 4-6wt%, are widely commercialized, considering that their properties approximate those of burned bricks of the same class.
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The general nature of the dependence of the technological and service characteristics of refractory concretes with an average cement content, as well as low-cement (LCRC), ultra-low cement (ULCRC) and cementless (CLRC), on the content of CaO (or НАC) in them is analyzed.
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Refractory concretes with the usual cement content (about 20%) present, besides their well-known advantages, several important disadvantages which make such concretes unfit for certain applications.
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