Length Comparator
Length Comparator
Ref. Standards : IS: 4031, IS:9459, ASTM C490 and BS: 1881
EKE 374:
For determination of the change in size of a concrete or cement sample, brought about by a change in moisture cement, the following apparatus has been designed. Tests can be performed on freshly made specimens or specimens taken from existing structures.
The apparatus can be used for three basic tests:
Initial drying shrinkage
The difference between the length of the cured specimen and the length when it is dried.
Drying shrinkage
The difference between the length of the specimen from existing structure and its length when completely dried.
Moisture movement
The difference between the length of the dried specimen and its length when again saturated with water.
The apparatus consists of a frame with adjustable cross head. The base is provided with a stainless steel circular platen having a recessed seating and a 300 to 301 mm long alloy steel reference bar having coefficient of thermal expansion less than 2 x 10-6 mm/degree Centigrade with 6 mm dia. steel bills mounted at the ends
Supplied complete with a dial gauge 0.002 mm x 10 mm
