The chemical reaction that takes place between cement when mixed with water is exothermic. The intensity of this reaction is measured in this test. The value of heat of hydration can be important where the cement maybe incorporated into concrete which will be poured in large volumes. In such cases there can be a considerable build up of heat as the reaction takes place, which, if excessive, could caused cracking in the structure. Heat of hydration of cement is expressed in calories per gram.
General Description And Specification:
The apparatus consists of an open mouthed thermos flask of definite dimensions with a cork lid, an insulated container for the flask, a Thermometer with reading lens, a constant speed stirrer(400-r.p.m.) and a funnel for introducing the sample. As Per IS 4031. Supplied without thermometer.