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. For early strength gain






2. Source of hotgases - biggest piece of moving equipment






3. Heat and pressure ex- marble - quaertzile






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






5. Nonpotable/potable >90% - the acceptable






6. Heavy traffic






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






8. Good stability






9. Sometimes worse






10. Normal- for general work






11. By vibrating - otherwise rock pockets occure -






12. Early stength at faster rate - for cold temps






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






14. To increase stability of materials - reduce rutting






15. Bending moment - no shear in middle third






16. Moderate Sulfate Resistance- large piers






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






18. Stop and reactivate hydration process






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






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






21. From chemicals or excessive drying






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






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






24. Low stability






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






26. makes it mushier because cement grains more distributed






27. Cement+course aggregate






28. High sulfate resistence -






29. Water used for hydration - water beyond SSD - min- .22-.25 - typical- .4-.5 (.44) - lower WC ratio = more strength -






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






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






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






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






34. Crush clinker into super fine powder






35. To improve workability for fresh concrete






36. Near surface water is cause






37. Ups capilary voids - lowers strength






38. Ups set time






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






40. Water beyond SSD condition






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






42. Trapped air - reduces strength - ups permeabiity






43. Flowable - nonsegregating






44. Space between layers in CSH - water in interparticle space held by hydrogen bonds






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






46. Cement+sand






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






48. B/c of trucks over time






49. 94 lbs






50. Distributes cement grains - cement becomes more mushy -