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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. Tricalcium silicate (C3S) - dicdalcium silicate (C2S) - tricalcium aluminate (C3A) - tetracalcium aluminoferrite (C4AF)
Water Reducer Admixture 2
Cement compounds
slump
transverse cracking
2. Sometimes worse
patches
joint faulting
water bleeding or pumping
Retarder Admixutre 3
3. Stop and reactivate hydration process
nominal max aggregate size
joint faulting
Hydration Contoller Admixture 4
transverse cracking
4. Flowable - nonsegregating
self consolidating concrete SCC
pozzolan
capillary voids
fineness modulus
5. High Early Strength- fast track projects - we want low set time
Type III Cement
nominal max aggregate size
C3S
high fineness
6. Greater =less free water needed to get a given slump
mortar
Hydration Contoller Admixture 4
joint faulting
nominal max aggregate size
7. Nonpotable/potable >90% - the acceptable
Air Entrainer Admixture 1
Curing Types
Potable Water
Type I Cement
8. For early strength gain
Accelerators Admixture 5
round and smooth agg
Air Entrainer Admixture 1
C3S
9. Calcareous (calcium) - argillaceous (aluminum) - iron oxide (iron) - gypsum (silicon)
concrete
joint faulting
Cement (Portland) ingredients
nominal max aggregate size
10. To increase stability of materials - reduce rutting
fineness modulus
angular and rough agg
plastic shrinkage
water-reducer
11. Cement+water
Hydration Contoller Admixture 4
paste
capillary voids
angular and rough agg
12. Moderate Sulfate Resistance- large piers
entrapped air
Cement (Portland) ingredients
water bleeding or pumping
Type II Cement
13. Stratified structure - disintegrated exitisting rocks - inorganice remains of marine animals - ex- limestone
paste
Sedimentary
mortar
concrete
14. Cement+sand
mortar
Type III Cement
interlayer hyrdration space
slump
15. High sulfate resistence -
map cracking
fineness modulus
patches
Type V Cement
16. Near surface water is cause
capillary voids
water bleeding or pumping
ball mill
map cracking
17. Cement paste has bulk SG< cement particles
C3S
Hydration Contoller Admixture 4
Type II Cement
capillary voids
18. 94 lbs
Bag of Cement
round and smooth agg
Water Reducer Admixture 2
Kiln
19. Consolidation - strike off - depress agg - darby or bull float - (TIME) - edging - jointing - floating - (TIME) - texturing - curing
Corner break
Cement (Portland) ingredients
scaling
Concrete Construction
20. Good stability
well graded mix (med fineness)
Cement (Portland) ingredients
ball mill
Water Reducer Admixture 2
21. Sum of cumul % retained / 100 - higher= bigger particle sizes= smaller amount of agg needed
Concrete Construction
Curing
Water Cement Ratio
fineness modulus
22. Normal- for general work
fineness modulus
Type I Cement
Consolidate
Curing
23. Ups set time
water bleeding or pumping
pozzolan
Curing Types
Water Cement Ratio
24. Freeze-thaw cycles - bad curing or too much water
metamorphic
scaling
joint faulting
map cracking
25. Source of hotgases - biggest piece of moving equipment
Cement (Portland) ingredients
water-reducer
Kiln
Water Reducer Admixture 2
26. Early stength at faster rate - for cold temps
Igneous
Accelerators Admixture 5
Sedimentary
water-reducer
27. Loss of water from paste (evap) - 1% vol lowers - cracking - prevent by water loss control -
plastic shrinkage
Type I Cement
well graded mix (med fineness)
Air Entrainer Admixture 1
28. B/c of trucks over time
longitudinal cracking
pozzolan
Retarder Admixutre 3
3 point loading flexure test
29. For continued hydration and strength gains - otherwise only 50% strength gained - ups durability and abrasion resistance - prevent shrinkage cracking -
Deposit concrete
C3S
Sedimentary
Curing
30. Heavy traffic
interlayer hyrdration space
joint faulting
metamorphic
Steps to place concrete
31. From chemicals or excessive drying
Air Entrainer Admixture 1
map cracking
well graded mix (med fineness)
Curing Types
32. Water used for hydration - water beyond SSD - min- .22-.25 - typical- .4-.5 (.44) - lower WC ratio = more strength -
slump
Kiln
gypsum
Water Cement Ratio
33. To improve workability for fresh concrete
round and smooth agg
Bag of Cement
concrete
Curing
34. Ponding/immersion - spraying/fogging - wet coverings -impervious papers/plastic sheets - membrane forming - steam - insulating blankets/covers - electric/hot oil/ infrared -
Curing Types
joint faulting
Curing
Type I Cement
35. By vibrating - otherwise rock pockets occure -
Excess water
Consolidate
mortar
Type II Cement
36. Heat and pressure ex- marble - quaertzile
metamorphic
Curing Types
fineness modulus
Kiln
37. Air bubbles for sapce for water to expand when freezes
Bag of Cement
entrained air
Air Entrainer Admixture 1
Accelerators Admixture 5
38. Bending moment - no shear in middle third
Steps to place concrete
entrained air
3 point loading flexure test
concrete
39. Cement+course aggregate
transverse cracking
Curing
map cracking
concrete
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 -
self consolidating concrete SCC
plastic shrinkage
Steps to place concrete
C3S
41. Low Heat of Hydration- for careful control of heat - dams
Water Reducer Admixture 2
Type IV Cement
water bleeding or pumping
Water Cement Ratio
42. Ups capilary voids - lowers strength
Deposit concrete
self consolidating concrete SCC
plastic shrinkage
Excess water
43. Intentional well distributed air - up durability - adds strength
entrained air
Cement compounds
paste
Water Reducer Admixture 2
44. makes it mushier because cement grains more distributed
Accelerators Admixture 5
water bleeding or pumping
Water Reducer Admixture 2
transverse cracking
45. Trapped air - reduces strength - ups permeabiity
joint faulting
water-reducer
round and smooth agg
entrapped air
46. Water beyond SSD condition
capillary voids
Cement (Portland) ingredients
free water
Cement compounds
47. Crush clinker into super fine powder
Water Cement Ratio
concrete
ball mill
paste
48. misplaced joints - more specific- spalling- breaking away of edges
transverse cracking
Potable Water
joint faulting
Igneous
49. Delay initial set - for long hauls or unusual placement
high fineness
mortar
Retarder Admixutre 3
Excess water
50. Corner was hotter on top than bottom - it warped and lifted - pressure makes corner crack -
Corner break
high fineness
Bag of Cement
well graded mix (med fineness)