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