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