Abstract
Field and laboratory tests were made to determine the characteristics of asphalt mastic coatings which may affect their performance on pipe lines as a corrosion protection device and as a weighting agent. A Blunt Needle Penetration Test was developed to aid in control of the quality of finished mastic coatings. This test proved quite sensitive to both binder quality and the ratio of binder to aggregate. Laboratory measurements were made of such physical properties as binder softening point and penetration, bulk density, adhesion, cohesion, apparent voids, blunt needle penetration, and temperature characteristics. Purpose of tests was to determine the mastic quality and the influence of various mixtures on physical properties of the mastic. A number of extensive outside discussions are included together with the author's replies.
5.4.5, 8.9.3, 2.3.7