alleryStart learning →In the heat-balance equation, the specific heat of cement is generally taken between:
A0.05 and 0.10 cal/g/°C
B0.10 and 0.20 cal/g/°C
C0.60 and 0.80 cal/g/°C
D0.25 and 0.30 cal/g/°C
Answer & Solution
Correct answer: D. 0.25 and 0.30 cal/g/°C
1. Each ingredient contributes a sensible-heat term proportional to its specific heat.
2. The unit reports cement specific heat as normally between 0.25 and 0.30 cal/g/°C.
3. For aggregates the specific heat is usually 0.20 to 0.25 cal/g/°C, slightly lower than cement.
4. For water it is 1.0 cal/g/°C and for ice 0.5 cal/g/°C.
5. The lower and higher ranges do not match cement's specific heat.
_Source: IGNOU Concrete Technology, Unit 7 "Concreting Equipment" (Mixers, Cableways, Batchers, Buckets, Pre/Post Cooling)._
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