This semi-adiabatic Langavant calorimeter system has been designed to measure the heat of hydration. This system serves only for determination of the heat of hydration in fresh mortar. The testing procedure consists of placing a sample of fresh mortar into a calorimeter, and determination of the amount of heat released on the basis of the temperature development that takes place.
The Test Calorimeter with No. 1 consists of a thermos vessel with a thermally insulating closure and a stable aluminum enclosure that serves as a mount. The reference calorimeter with No. 2 has the same structural features and the same properties as the test calorimeter. The Mortar container is used to hold the mortar sample that is separated after each test. This container is water-vapour proof, and the cover (lid) is provided with a cylindrical thermometer fitting in its centre.
EN 196-9 stipulates that the room temperature of the laboratory must be 20 ± 2°C for mixture of the mortar and for conduct of the testing. The interval between the calorimeters must be approximately 12 cm. The speed of air movement in the vicinity of the calorimeter must be less than 0.5 m/s (in other words: no draughts!).
|Technical Specifications: Semi-Adiabatic Langavant Calorimeter|
|Test Calorimeter with No. 1|
|External dimensions||Ø (diameter) of 180 mm x 400 mm|
|Weight (mass)||4.5 kg|
|Thermos vessel||Ø (diameter) of 100 mm x 240 mm|
|Interior rubber ring||Ø (diameter) of 95 mm|
|Reference calorimeter||Same as Test Calorimeter with No. 1|
|Dimensions||Ø (diameter) of 84 mm x 162+3 mm|
|Volume||approx. 880 cm³|
|Thermometer fitting||Ø (diameter) of 10 mm x 100 mm|
|Temperature sensor||Pt 100|
|Length of connection cable||2.5 m|
|Accuracy class||A, in accordance with DIN 60751|