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