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