Heat of Hydration Apparatus

The Heat of Hydration Apparatus is used to determine the heat generated during the hydration (chemical reaction with water) of cement, an important property affecting the performance of cement in mass concrete works such as dams, where excessive heat generation can lead to thermal cracking. The test is typically conducted using a calorimetric method, where the heat evolved by a cement-water mix is measured over a specified curing period against a reference under controlled conditions. This apparatus is primarily used in specialised cement testing and research laboratories.

This equipment is required to determine the heat of hydration of cement as expressed in calories per gram.

The equipment comprises of the following:

1) A wide mounted double walled vacuum flask with a stop cock

38 mm & a insulating container for the flask

2) A Beckman thermometer (Range 5° C) held tightly by the cock

stopper in such a way as to avoid accidental contact with the stirrer

blade & the reading lens. To facilitate the easy removal, the cock

stopper is in two halves.

3) A constant speed stirrer (double bladed propeller type) extended to

within 38 mm from the bottom of the flask.

4) A funnel (Gooch type) with a stem of 6 mm inner dia & a body

approx. 25 mm long and 25 mm dia is fitted to the cock stopper for

introducing the sample

All the above to combine to form the calorimeter for the determination

of heat of hydration of cement.

Suitable to Operate on 230 V A.C. 50 Hz