IIBEC RRO STUDY GUIDE QUESTIONS WITH
100% VERIFIED CORRECT ANSWERS
◉ What is the percentage range of modifier in asphalt for SBS?
Answer: 11% to 15%
◉ What is the percentage range of modifier in asphalt for APP?
Answer: 20% to 30%
◉ What are the two main modifiers used in Mod Bit roll goods?
Answer: APP and SBS
◉ What does APP stand for? Answer: Atactic Polypropylene
◉ What is the chemical formula for APP? Answer: C3H6
◉ What does SBS stand for? Answer: Sequenced Butadiene Styrene
◉ What is the chemical formula for SBS? Answer: C12H14
◉ Why do we modify bitumen? Answer: -Flatten temperature
susceptibility curve
, -Enhance flexibility and ductility
-Improve weather resistance
-Provide cost and energy effective roof systems
-High strain energy
◉ What are modified bitumen sheets made of? Answer: Either glass,
polyester, or a mixture of the two
◉ APP plastic modified bitumen is generally stronger and more
useful at high temps than what? Answer: Blown asphalt
◉ The APP modifier and asphalt are both considered what? Answer:
Thermoplastic polymers
◉ SBS rubber is more _______ than APP but only half is the SBS
modifier is required. Answer: Expensive
◉ SBS is considered a what? Answer: Thermoplastic elastometer
◉ Upon cooling, the new material (mix of SBS and asphalt) has what
properties? Answer: -Elastic properties
-Very good low temp properties
100% VERIFIED CORRECT ANSWERS
◉ What is the percentage range of modifier in asphalt for SBS?
Answer: 11% to 15%
◉ What is the percentage range of modifier in asphalt for APP?
Answer: 20% to 30%
◉ What are the two main modifiers used in Mod Bit roll goods?
Answer: APP and SBS
◉ What does APP stand for? Answer: Atactic Polypropylene
◉ What is the chemical formula for APP? Answer: C3H6
◉ What does SBS stand for? Answer: Sequenced Butadiene Styrene
◉ What is the chemical formula for SBS? Answer: C12H14
◉ Why do we modify bitumen? Answer: -Flatten temperature
susceptibility curve
, -Enhance flexibility and ductility
-Improve weather resistance
-Provide cost and energy effective roof systems
-High strain energy
◉ What are modified bitumen sheets made of? Answer: Either glass,
polyester, or a mixture of the two
◉ APP plastic modified bitumen is generally stronger and more
useful at high temps than what? Answer: Blown asphalt
◉ The APP modifier and asphalt are both considered what? Answer:
Thermoplastic polymers
◉ SBS rubber is more _______ than APP but only half is the SBS
modifier is required. Answer: Expensive
◉ SBS is considered a what? Answer: Thermoplastic elastometer
◉ Upon cooling, the new material (mix of SBS and asphalt) has what
properties? Answer: -Elastic properties
-Very good low temp properties
