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