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