Exam 3 Construction Materials
Questions with Verified Answers
What is tar? - ANSWERSA coke bicproduct from burning coal. Its heavy, viscous, and
very adhesive
What is Asphalt? - ANSWERSPetrolium byproduct from crude oil
What is the refining process of asphalt? (steps) - ANSWERS1.Drill well
2.Tanks drilling rigs are all on the well pad
3.Get crude oil to go into a pipeline
4.Goes o terminal that goes to a refinery
refinery break the polymers into smaller shorter chain polymers
5. Refinery makes 3 different distillates (light medium and heavy) (gas, kerosene, diesel
oil respectively)
What is cutback AC? - ANSWERSIts like a super plasticizor, very viscous, can modify it
with solvents.
What solvent modify asphaltic cement? - ANSWERS1. Rapid Cure ( Gasoline)
2. Medium Cure (Kerosene)
3. Slow Cure (Oils)
Can have RC 70 to RC 300 going from runny to thick viscosity.
What are emultions? - ANSWERSGlobs of Asphaltic cement in water
What is an inverted emultions - ANSWERSWater in asphaltic cement
What is the difference between Anionic and cat-ionic? - ANSWERSAnionic are
negatively charged and catonics are positively charged
Name some types of AC... - ANSWERS1. Hot mix 250-325 ferenhiet, ACC most
common, sand asphalt course mix
2.Cold mix (liquid asphalt cement) mostly for patches
3. Cold laid mix
4. Road mix
5. Sprays
6. RAP (Recycled Asphalt Paste)
What are some types of sprays...(AC) - ANSWERS1. Surface Coat - Cosmetic, makes it
look pretty :0
, 2. Seal Coat - seal cracks to prevent water from entering
3. Tack- Put between layers to help bond
4. Prime similar to tack but between soil and pavement
For Grady... What is mcadam? - ANSWERSCompacted aggregate with AC poured in a
layer on top
AC Plants - ANSWERSSame as PC
What are some mix deficiencies bitch.. - ANSWERS1. Too hot - will shorten the polymer
chains, oxidations, blue smoke, no more than 350 degrees
2. Too cold - will not place/stiff
3. Too much AC - to liquidy, if flat load in truck..too much AC
4. too little AC - granular
5. Excess water - White smoke indicator
What are some equipment for laying AC? - ANSWERS1. Paver
2. Roller
What parts does of paver have? - ANSWERS1. Crawler - pulls unit along
2. Hopper- catches the AC/where it dumps asphalt
3. Spreader - Screw auger
4. Screed - Flattens asphalt
Name types of rollers slut! - ANSWERS1. Steel Roller - even flat roll / finish
2. Pneumatic Roller - just for compaction
3. Vibratory Roller - compaction
What is the difference between iron and steel? - ANSWERSIron has > 2% Carbon
Steel < 2% carbon
What is a ferrous metal? - ANSWERSMetal containing iron
What are the effects of grain size in metals? - ANSWERS1. If he metal is cooled slowly,
the carbon particles can evenly disperse.
2. If metal is cooled rapidly, large grains, turns brittles
In all types of steel there are what... - ANSWERSCarbon
Manganese
silicon
sulfur
Phosphorus
Name some alloys - ANSWERSChromium
Nickel $$$
tungsten
Questions with Verified Answers
What is tar? - ANSWERSA coke bicproduct from burning coal. Its heavy, viscous, and
very adhesive
What is Asphalt? - ANSWERSPetrolium byproduct from crude oil
What is the refining process of asphalt? (steps) - ANSWERS1.Drill well
2.Tanks drilling rigs are all on the well pad
3.Get crude oil to go into a pipeline
4.Goes o terminal that goes to a refinery
refinery break the polymers into smaller shorter chain polymers
5. Refinery makes 3 different distillates (light medium and heavy) (gas, kerosene, diesel
oil respectively)
What is cutback AC? - ANSWERSIts like a super plasticizor, very viscous, can modify it
with solvents.
What solvent modify asphaltic cement? - ANSWERS1. Rapid Cure ( Gasoline)
2. Medium Cure (Kerosene)
3. Slow Cure (Oils)
Can have RC 70 to RC 300 going from runny to thick viscosity.
What are emultions? - ANSWERSGlobs of Asphaltic cement in water
What is an inverted emultions - ANSWERSWater in asphaltic cement
What is the difference between Anionic and cat-ionic? - ANSWERSAnionic are
negatively charged and catonics are positively charged
Name some types of AC... - ANSWERS1. Hot mix 250-325 ferenhiet, ACC most
common, sand asphalt course mix
2.Cold mix (liquid asphalt cement) mostly for patches
3. Cold laid mix
4. Road mix
5. Sprays
6. RAP (Recycled Asphalt Paste)
What are some types of sprays...(AC) - ANSWERS1. Surface Coat - Cosmetic, makes it
look pretty :0
, 2. Seal Coat - seal cracks to prevent water from entering
3. Tack- Put between layers to help bond
4. Prime similar to tack but between soil and pavement
For Grady... What is mcadam? - ANSWERSCompacted aggregate with AC poured in a
layer on top
AC Plants - ANSWERSSame as PC
What are some mix deficiencies bitch.. - ANSWERS1. Too hot - will shorten the polymer
chains, oxidations, blue smoke, no more than 350 degrees
2. Too cold - will not place/stiff
3. Too much AC - to liquidy, if flat load in truck..too much AC
4. too little AC - granular
5. Excess water - White smoke indicator
What are some equipment for laying AC? - ANSWERS1. Paver
2. Roller
What parts does of paver have? - ANSWERS1. Crawler - pulls unit along
2. Hopper- catches the AC/where it dumps asphalt
3. Spreader - Screw auger
4. Screed - Flattens asphalt
Name types of rollers slut! - ANSWERS1. Steel Roller - even flat roll / finish
2. Pneumatic Roller - just for compaction
3. Vibratory Roller - compaction
What is the difference between iron and steel? - ANSWERSIron has > 2% Carbon
Steel < 2% carbon
What is a ferrous metal? - ANSWERSMetal containing iron
What are the effects of grain size in metals? - ANSWERS1. If he metal is cooled slowly,
the carbon particles can evenly disperse.
2. If metal is cooled rapidly, large grains, turns brittles
In all types of steel there are what... - ANSWERSCarbon
Manganese
silicon
sulfur
Phosphorus
Name some alloys - ANSWERSChromium
Nickel $$$
tungsten
