Round 1

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Across
  1. 2. A tool used to smooth concrete surfaces (6 letters)
  2. 8. A type of concrete reinforcement (6 letters)
  3. 9. A device used to vibrate concrete (7 letters)
  4. 10. A type of crack in concrete (7 letters)
  5. 11. A type of concrete used for soundproofing (8 letters)
  6. 14. A test to measure concrete strength (10 letters)
  7. 16. A type of concrete used in underwater construction (8 letters)
  8. 17. A material used to fill gaps in concrete (5 letters)
  9. 20. A chemical reaction that strengthens concrete (9 letters)
  10. 21. A type of concrete with lightweight aggregates (8 letters
Down
  1. 1. A machine used to mix concrete (5 letters)
  2. 3. A common additive to improve concrete workability (5 letters)
  3. 4. A type of concrete used for high-rise buildings (8 letters)
  4. 5. A layer of concrete placed on the ground (4 letters)
  5. 6. A common aggregate in concrete (5 letters)
  6. 7. A common concrete admixture (7 letters)
  7. 12. A binding material used in concrete (5 letters)
  8. 13. A type of concrete used in cold weather (7 letters)
  9. 15. The process of hardening concrete (8 letters)
  10. 18. A type of concrete finish (6 letters)
  11. 19. A type of concrete used for decorative purposes (7 letters)