full transcript

From the Ted Talk by Erik Schlangen: A "self-healing" asphalt

Unscramble the Blue Letters


phlteoos, of course, that can become a problem, but we have a solution. Here you see actually how the damage appears in this material. It's a porous asphalt, like I said, so you have only a small amount of binder between the stones. Due to weathering, due to U.V. lghit, due to oxidation, this binder, this bitumen, the glue between the aegrgegtas is going to sihrnk, and if it shrinks, it gets micro-cracks, and it dntameaiels from the aggregates. Then if you drive over the road, you take out the aggregates — what we just saw here. To solve this problem, we thought of self-healing materials. If we can make this material self-healing, then probably we have a solution. So what we can do is use steel wool just to clean pans, and the steel wool we can cut in very small peceis, and these very small pieces we can mix to the bitumen. So then you have asphalt with very small pieces of seetl wool in it. Then you need a machine, like you see here, that you can use for cooking — an induction machine. itcdunion can heat, especially steel; it's very good at that. Then what you do is you heat up the steel, you melt the bitumen, and the buitmen will flow into these micro-cracks, and the stones are again fixed to the surface.

Open Cloze


________, of course, that can become a problem, but we have a solution. Here you see actually how the damage appears in this material. It's a porous asphalt, like I said, so you have only a small amount of binder between the stones. Due to weathering, due to U.V. _____, due to oxidation, this binder, this bitumen, the glue between the __________ is going to ______, and if it shrinks, it gets micro-cracks, and it ___________ from the aggregates. Then if you drive over the road, you take out the aggregates — what we just saw here. To solve this problem, we thought of self-healing materials. If we can make this material self-healing, then probably we have a solution. So what we can do is use steel wool just to clean pans, and the steel wool we can cut in very small ______, and these very small pieces we can mix to the bitumen. So then you have asphalt with very small pieces of _____ wool in it. Then you need a machine, like you see here, that you can use for cooking — an induction machine. _________ can heat, especially steel; it's very good at that. Then what you do is you heat up the steel, you melt the bitumen, and the _______ will flow into these micro-cracks, and the stones are again fixed to the surface.

Solution


  1. induction
  2. aggregates
  3. light
  4. potholes
  5. delaminates
  6. pieces
  7. shrink
  8. steel
  9. bitumen

Original Text


Potholes, of course, that can become a problem, but we have a solution. Here you see actually how the damage appears in this material. It's a porous asphalt, like I said, so you have only a small amount of binder between the stones. Due to weathering, due to U.V. light, due to oxidation, this binder, this bitumen, the glue between the aggregates is going to shrink, and if it shrinks, it gets micro-cracks, and it delaminates from the aggregates. Then if you drive over the road, you take out the aggregates — what we just saw here. To solve this problem, we thought of self-healing materials. If we can make this material self-healing, then probably we have a solution. So what we can do is use steel wool just to clean pans, and the steel wool we can cut in very small pieces, and these very small pieces we can mix to the bitumen. So then you have asphalt with very small pieces of steel wool in it. Then you need a machine, like you see here, that you can use for cooking — an induction machine. Induction can heat, especially steel; it's very good at that. Then what you do is you heat up the steel, you melt the bitumen, and the bitumen will flow into these micro-cracks, and the stones are again fixed to the surface.

Frequently Occurring Word Combinations


ngrams of length 2

collocation frequency
steel wool 3
surface life 3
splash water 2
silent road 2
small pieces 2
induction machine 2


Important Words


  1. aggregates
  2. amount
  3. appears
  4. asphalt
  5. binder
  6. bitumen
  7. clean
  8. cooking
  9. cut
  10. damage
  11. delaminates
  12. drive
  13. due
  14. fixed
  15. flow
  16. glue
  17. good
  18. heat
  19. induction
  20. light
  21. machine
  22. material
  23. materials
  24. melt
  25. mix
  26. oxidation
  27. pans
  28. pieces
  29. porous
  30. potholes
  31. problem
  32. road
  33. shrink
  34. shrinks
  35. small
  36. solution
  37. solve
  38. steel
  39. stones
  40. surface
  41. thought
  42. weathering
  43. wool