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Glass bricks are important transparent building materials. They are produced by joining two halves of glass pressings at 600–700°C. During this production process alkali oxides evaporate and are redeposited at the cooler inner front surfaces of the bricks. This surface layer reacts with H 2 O and CO 2 from the residual brick atmosphere, leading to the formation of an alkali-rich silicate-hydrate...
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