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Surface coated polymer concrete has been used to improve durability of bridge decks. The unit specifies treatment by adding monomer initially at a rate of about:
Answer & Solution
Correct answer: D.
1. The surface coating procedure starts by drying the deck with an electrical heating blanket.
2. The surface is then covered with a light weight fine aggregate after removing the blanket.
3. The unit prescribes an initial monomer application of 2000–3000 ml per square metre.
4. Evaporation is suppressed with a polyethylene cover, and the surface kept moist for at least 8 hours.
5. The lower or higher application rates are not the values prescribed.
_Source: IGNOU Concrete Technology, Unit 11 "Special Concrete" (Light Weight, Aerated, No-Fines, High Density, Fibre Reinforced, Polymer Concrete)._
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