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






2. Loss of water from paste (evap) - 1% vol lowers - cracking - prevent by water loss control -






3. Cement+water






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






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






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






7. Sometimes worse






8. Normal- for general work






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






10. Low stability






11. Early stength at faster rate - for cold temps






12. Near surface water is cause






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






14. Distributes cement grains - cement becomes more mushy -






15. Cement+sand






16. Ups set time






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






18. Bending moment - no shear in middle third






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






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






21. Heavy traffic






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






23. For early strength gain






24. Cement paste has bulk SG< cement particles






25. Crush clinker into super fine powder






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






27. To improve workability for fresh concrete






28. From chemicals or excessive drying






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






30. Cement+course aggregate






31. Stop and reactivate hydration process






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






33. Freeze-thaw cycles - bad curing or too much water






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






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






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






37. Trapped air - reduces strength - ups permeabiity






38. Heat and pressure ex- marble - quaertzile






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






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






41. High sulfate resistence -






42. Source of hotgases - biggest piece of moving equipment






43. Water beyond SSD condition






44. B/c of trucks over time






45. Moderate Sulfate Resistance- large piers






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






47. By vibrating - otherwise rock pockets occure -






48. Flowable - nonsegregating






49. Good stability






50. Nonpotable/potable >90% - the acceptable