Which of the following is not a standard for APP polymer-modified bitumen sheets?

Which of the following is not a standard for APP polymer-modified bitumen sheets?

• A. ASTM D6590
• B. ASTM D6162
• C. ASTM D6163
• D. ASTM D6164

Answer: (A)

APP polymer-modified bitumen sheets are defined by ASTM standards that are specific to modified asphalt roof membranes. The standards in the D6162, D6163, and D6164 family are the ones that specify the requirements and test methods for APP-modified roofing sheets, covering how these membranes should perform and what properties they must meet in service. ASTM D6590 does not fall within that same scope. It addresses a different roofing product category or testing area, not APP-modified bitumen sheets. Because its scope isn’t aligned with APP membranes, it isn’t used to establish the specifications for APP polymer-modified bitumen sheets.

APP polymer-modified bitumen sheets are defined by ASTM standards that are specific to modified asphalt roof membranes. The standards in the D6162, D6163, and D6164 family are the ones that specify the requirements and test methods for APP-modified roofing sheets, covering how these membranes should perform and what properties they must meet in service.

ASTM D6590 does not fall within that same scope. It addresses a different roofing product category or testing area, not APP-modified bitumen sheets. Because its scope isn’t aligned with APP membranes, it isn’t used to establish the specifications for APP polymer-modified bitumen sheets.