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