QCC Lab Mild Steel Mechanical 5-10kg Length Comparator Meter, For Material Testing

As Per IS 9459 - 1980; IS 4031 (Part - X) - 1988; IS 1199 - 1959.
It is used to measure the drying shrinkage of concrete autoclave expansion of Portland cement and potential expansive reactivity of cement aggregate combinations in mortar bars during storage, on self-drying.

The instrument consists of a channel base over which two vertical pillars are fixed. An adjustable cross plate is at the top. A Dial Gauge, reading 0.002mm x 12mm or 5mm can be fixed at the top across the plate. The plunger end of the Dial Gauge can be located upon a 6.5mm Dia ball or other reference point cemented in the specimen. On the base there is a similar recessed seating in which can be placed a second ball or reference point in the specimen.