Length Comparator

Length Comparator

Categories: Civil Engineering Lab Instruments

Length Comparator 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 shr...


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Length Comparator 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/degC with 6 mm dia steel balls mounted at the ends, Supplied complete, with a dial guage 0.002 mm x 10 mm.


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quick overview :

Length Comparator 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/degC with 6 mm dia steel balls mounted at the ends, Supplied complete, with a dial guage 0.002 mm x 10 mm.

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