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