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Four sets of alkali-activated aluminosilicate composites based on ceramic precursors were studied in terms of their characterization by mechanical fracture and microstructural parameters. Composites made with brick dust as a precursor and with alkaline activator variants of differing silicate modulus (Ms = 0.8, 1.0, 1.2, 1.4 and 1.6) were investigated. The filler used with first two sets of composites...
Structural concrete of the building of Vítkovice railway station from 1970s is characterized via mechanical fracture parameters. In this paper, six core-drilled cylindrical specimens with diameter of 75mm were provided by a Chevron type notch of depth of 12 mm. Three-point bending fracture tests were conducted on these specimens supported as beams with the span of 170mm. Load vs. deflection and load...
The paper deals with the experimental determination of relative length changes development during cement based composite ageing. Special moulds with the dimensions 100 × 60 × 1000mm were used for the measurements. These moulds were filled and placed on an advanced weighing table that enables continuous recording of mass losses caused by free drying of the specimen surface. In this way, the mass losses...
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