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Test your basic knowledge |
Civil Engineering Materials
Start Test
Study First
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. High sulfate resistence -
metamorphic
Type V Cement
Type III Cement
pozzolan
2. Bending moment - no shear in middle third
water bleeding or pumping
3 point loading flexure test
transverse cracking
Air Entrainer Admixture 1
3. makes it mushier because cement grains more distributed
Excess water
pozzolan
Cement compounds
Water Reducer Admixture 2
4. B/c of trucks over time
water-reducer
longitudinal cracking
gypsum
high fineness
5. Sum of cumul % retained / 100 - higher= bigger particle sizes= smaller amount of agg needed
Consolidate
fineness modulus
Hydration Contoller Admixture 4
paste
6. Cement+sand
Curing
Retarder Admixutre 3
Cement (Portland) ingredients
mortar
7. Tricalcium silicate (C3S) - dicdalcium silicate (C2S) - tricalcium aluminate (C3A) - tetracalcium aluminoferrite (C4AF)
round and smooth agg
Bag of Cement
C3S
Cement compounds
8. Calcareous (calcium) - argillaceous (aluminum) - iron oxide (iron) - gypsum (silicon)
Deposit concrete
Excess water
Concrete Construction
Cement (Portland) ingredients
9. Heavy traffic
Type III Cement
Type II Cement
Type I Cement
joint faulting
10. By vibrating - otherwise rock pockets occure -
water-reducer
slump
high fineness
Consolidate
11. Low stability
high fineness
Potable Water
plastic shrinkage
Retarder Admixutre 3
12. Ups set time
free water
well graded mix (med fineness)
pozzolan
Steps to place concrete
13. Heat and pressure ex- marble - quaertzile
Steps to place concrete
Concrete Construction
Igneous
metamorphic
14. Trapped air - reduces strength - ups permeabiity
Corner break
Sedimentary
entrapped air
nominal max aggregate size
15. Slow down rate of aluminate hydration -produces sulfate ions - flash set - false set in excess - higher rate of C-S-H (strength)
high fineness
gypsum
water bleeding or pumping
water-reducer
16. max is 12 in - more free water= more slump
Potable Water
Kiln
C3S
slump
17. Water beyond SSD condition
3 point loading flexure test
capillary voids
free water
angular and rough agg
18. Distributes cement grains - cement becomes more mushy -
capillary voids
Air Entrainer Admixture 1
well graded mix (med fineness)
water-reducer
19. High Early Strength- fast track projects - we want low set time
Type III Cement
Water Reducer Admixture 2
Consolidate
plastic shrinkage
20. misplaced joints - more specific- spalling- breaking away of edges
3 point loading flexure test
entrained air
transverse cracking
Type V Cement
21. To increase stability of materials - reduce rutting
Air Entrainer Admixture 1
interlayer hyrdration space
Cement (Portland) ingredients
angular and rough agg
22. Cement+water
Cement compounds
paste
entrained air
Curing
23. Sometimes worse
interlayer hyrdration space
Type IV Cement
patches
Sedimentary
24. Cement paste has bulk SG< cement particles
entrapped air
capillary voids
Water Cement Ratio
Sedimentary
25. Early stength at faster rate - for cold temps
Accelerators Admixture 5
longitudinal cracking
Type IV Cement
Bag of Cement
26. Water used for hydration - water beyond SSD - min- .22-.25 - typical- .4-.5 (.44) - lower WC ratio = more strength -
longitudinal cracking
gypsum
Water Cement Ratio
well graded mix (med fineness)
27. Do NOT dump in separate piles - deposit in large piles -
Deposit concrete
Type I Cement
entrained air
Potable Water
28. Intentional well distributed air - up durability - adds strength
entrained air
C3S
water bleeding or pumping
angular and rough agg
29. For continued hydration and strength gains - otherwise only 50% strength gained - ups durability and abrasion resistance - prevent shrinkage cracking -
water-reducer
capillary voids
Curing
Concrete Construction
30. Near surface water is cause
Steps to place concrete
water bleeding or pumping
Water Cement Ratio
high fineness
31. For early strength gain
water-reducer
Potable Water
Sedimentary
C3S
32. Corner was hotter on top than bottom - it warped and lifted - pressure makes corner crack -
Type III Cement
patches
Corner break
Potable Water
33. Low Heat of Hydration- for careful control of heat - dams
Air Entrainer Admixture 1
Type IV Cement
3 point loading flexure test
Type II Cement
34. Flowable - nonsegregating
self consolidating concrete SCC
fineness modulus
interlayer hyrdration space
entrapped air
35. Space between layers in CSH - water in interparticle space held by hydrogen bonds
interlayer hyrdration space
well graded mix (med fineness)
transverse cracking
Type V Cement
36. Stratified structure - disintegrated exitisting rocks - inorganice remains of marine animals - ex- limestone
Sedimentary
water-reducer
ball mill
Type V Cement
37. Freeze-thaw cycles - bad curing or too much water
Air Entrainer Admixture 1
capillary voids
Igneous
scaling
38. Volcanic - hardening and crystal molten material ex- granite
Igneous
patches
C3S
pozzolan
39. Air bubbles for sapce for water to expand when freezes
Kiln
Air Entrainer Admixture 1
free water
water-reducer
40. Moderate Sulfate Resistance- large piers
high fineness
Type II Cement
Potable Water
Type I Cement
41. 94 lbs
Potable Water
map cracking
longitudinal cracking
Bag of Cement
42. Greater =less free water needed to get a given slump
Accelerators Admixture 5
nominal max aggregate size
Type III Cement
Igneous
43. Normal- for general work
patches
Kiln
map cracking
Type I Cement
44. From chemicals or excessive drying
paste
Corner break
Type I Cement
map cracking
45. Nonpotable/potable >90% - the acceptable
metamorphic
Consolidate
fineness modulus
Potable Water
46. Trim subgrade - moisten subgrade - compact (use vibratory roller) - do NOT deposit frozen subgrade or disturb it - uniform - NO water added in front of paver -
gypsum
Steps to place concrete
Type V Cement
metamorphic
47. Stop and reactivate hydration process
free water
water bleeding or pumping
Hydration Contoller Admixture 4
Water Reducer Admixture 2
48. Source of hotgases - biggest piece of moving equipment
Curing Types
Kiln
pozzolan
transverse cracking
49. Ponding/immersion - spraying/fogging - wet coverings -impervious papers/plastic sheets - membrane forming - steam - insulating blankets/covers - electric/hot oil/ infrared -
plastic shrinkage
Deposit concrete
Curing Types
ball mill
50. Loss of water from paste (evap) - 1% vol lowers - cracking - prevent by water loss control -
Cement (Portland) ingredients
Type II Cement
plastic shrinkage
capillary voids