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