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Which Indian trade names refer to commercial aerated concrete products described in the unit?
Answer & Solution
Correct answer: C.
1. The unit names commercial aerated concrete products marketed in India.
2. Siporex, Celcrete and Vayutan are the listed trade names.
3. These are autoclaved cellular concrete blocks used for low-density walls.
4. Sika, Plastiment and Conplast are admixture brands, not aerated concrete.
5. Birla Gold, ACC Suraksha and Ambuja Plus are cement brands.
_Source: IGNOU Concrete Technology, Unit 11 "Special Concrete" (Light Weight, Aerated, No-Fines, High Density, Fibre Reinforced, Polymer Concrete)._
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