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