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