Test your basic knowledge |

Civil Engineering Materials

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Crush clinker into super fine powder






2. Stop and reactivate hydration process






3. Calcareous (calcium) - argillaceous (aluminum) - iron oxide (iron) - gypsum (silicon)






4. To improve workability for fresh concrete






5. Low Heat of Hydration- for careful control of heat - dams






6. Good stability






7. makes it mushier because cement grains more distributed






8. Sometimes worse






9. From chemicals or excessive drying






10. Stratified structure - disintegrated exitisting rocks - inorganice remains of marine animals - ex- limestone






11. 94 lbs






12. Slow down rate of aluminate hydration -produces sulfate ions - flash set - false set in excess - higher rate of C-S-H (strength)






13. Corner was hotter on top than bottom - it warped and lifted - pressure makes corner crack -






14. Moderate Sulfate Resistance- large piers






15. Heavy traffic






16. B/c of trucks over time






17. Cement paste has bulk SG< cement particles






18. Delay initial set - for long hauls or unusual placement






19. For continued hydration and strength gains - otherwise only 50% strength gained - ups durability and abrasion resistance - prevent shrinkage cracking -






20. High sulfate resistence -






21. Heat and pressure ex- marble - quaertzile






22. Ups set time






23. Bending moment - no shear in middle third






24. Early stength at faster rate - for cold temps






25. High Early Strength- fast track projects - we want low set time






26. Sum of cumul % retained / 100 - higher= bigger particle sizes= smaller amount of agg needed






27. Near surface water is cause






28. Ponding/immersion - spraying/fogging - wet coverings -impervious papers/plastic sheets - membrane forming - steam - insulating blankets/covers - electric/hot oil/ infrared -






29. Do NOT dump in separate piles - deposit in large piles -






30. Greater =less free water needed to get a given slump






31. Cement+sand






32. Air bubbles for sapce for water to expand when freezes






33. Low stability






34. Flowable - nonsegregating






35. max is 12 in - more free water= more slump






36. misplaced joints - more specific- spalling- breaking away of edges






37. Trapped air - reduces strength - ups permeabiity






38. Water beyond SSD condition






39. Source of hotgases - biggest piece of moving equipment






40. Consolidation - strike off - depress agg - darby or bull float - (TIME) - edging - jointing - floating - (TIME) - texturing - curing






41. Trim subgrade - moisten subgrade - compact (use vibratory roller) - do NOT deposit frozen subgrade or disturb it - uniform - NO water added in front of paver -






42. Intentional well distributed air - up durability - adds strength






43. Nonpotable/potable >90% - the acceptable






44. For early strength gain






45. Ups capilary voids - lowers strength






46. Cement+course aggregate






47. Distributes cement grains - cement becomes more mushy -






48. Cement+water






49. Volcanic - hardening and crystal molten material ex- granite






50. Tricalcium silicate (C3S) - dicdalcium silicate (C2S) - tricalcium aluminate (C3A) - tetracalcium aluminoferrite (C4AF)