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HM-255 2x2x10in (51x51x254mm) 2-Gang Prism Mold is used in length-change testing of Portland cement paste, mortar or concrete. It is also used with the Length Comparator to measure length change in cast prisms from alkali-silica reactivity (ASR) and other such causes. The mold is equipped with a base plate, removable partitions and end plates of corrosion resistant steel to provide required length between ends of HM-268 Gage Studs cast in ends of bars. Dimensions from outside end of gage studs are 11.25in (286mm) with specimen cross sections of 1x1in (25x25mm).
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