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Until recent years, the grouts used for cementing silica bricks had a quite different chemical composition and a mineralogical composition quite close to those of silica bricks. Indeed, they were prepared from baked finely ground silica bricks to which plastic clay was added in order to provide the grout with a certain ease in employment and allow ceramic setting at high temperature. The ternary SiO2-Al2O3-CaO diagram shows that these types of grouts have limiting temperatures of utilization incompatible with temperatures reached in modern coke furnaces. The grouts are therefore developed in the direction of purity (decrease in contents of CaO and Al2O3) and fineness in order for the ceramic setting to be reached at high temperature by sintering. The specifications relating to silica grouts are few in number and rather disparate. The tests carried out on about 20 silica grouts: mineralogical and particle-size analyses, pyroscopic strength, thermal expansion, settling tests under differential charge and creep on sandwich test specimens have allowed specifying the limiting values of these different characteristics and can allow estimate of the quality of a given grout. (Author)
Until recent years, the grouts used for cementing silica bricks had a quite different chemical composition and a mineralogical composition quite close to those of silica bricks. Indeed, they were prepared from baked finely ground silica bricks to which plastic clay was added in order to provide the grout with a certain ease in employment and allow ceramic setting at high temperature. The ternary SiO2-Al2O3-CaO diagram shows that these types of grouts have limiting temperatures of utilization incompatible with temperatures reached in modern coke furnaces. The grouts are therefore developed in the direction of purity (decrease in contents of CaO and Al2O3) and fineness in order for the ceramic setting to be reached at high temperature by sintering. The specifications relating to silica grouts are few in number and rather disparate. The tests carried out on about 20 silica grouts: mineralogical and particle-size analyses, pyroscopic strength, thermal expansion, settling tests under differential charge and creep on sandwich test specimens have allowed specifying the limiting values of these different characteristics and can allow estimate of the quality of a given grout. (Author)
Silica Grouts (Les Coulis de Silice)
J. Baron (author)
1976
28 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Ceramics, Refractories, & Glass , Construction Materials, Components, & Equipment , Silicon dioxide , Grout , Ceramic materials , Sintering , Cements , Sandwich construction , Thermal expansion , Test and evaluation , France , Bricks , Construction materials , Aluminum oxides , Calcium oxides , Phase studies , Translations
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