The Welsh copper industries of mining, smelting and refining created generations of talented workers. Although dominated by men, women took part too, particularly in the North Wales mines.
Asphalt (Composition) Shingles: The ideal temperature range to install asphalt shingles is between 70 and 80 degrees Fahrenheit. Colder than 70 degrees and the adhesive will not reach the ideal elasticity and will not create a perfect seal.sphalt (Composition) Shingles: The ideal temperature range to install asphalt shingles is between 70 and 80 degrees Fahrenheit. Colder than 70 degrees and the adhesive will not reach the ideal elasticity and will not create a perfect seal.
A.3 R&BT TEMPERATURE. The softening point of asphalt binder as measured by AASHTO T53-08 is also known as R&BT. According to literature on the topic, this temperature, measured in Fahrenheit, corresponds to the temperature at which asphalt binder has a viscosity of 13,000 P (1,300 Pas).n this test, a 3.5-oz (100-g) needle is used to penetrate an asphalt sample for 5 s. The amount of penetration, measured in tenths of a millimeter, is the penetration number for the asphalt binder at the particular test temperature.