意味と使い方

ASTM D7735 Type A Hardness Tester for Thermoplastic Pavement Marking at High Temperatures The standard test method for hardness testing covers the Type A hardness tester for thermoplastic pavement marking materials at high temperatures.

5.1 This method is based on the penetration of a specific type of indenter when pressed into the material under specific conditions. Indentation hardness is inversely proportional to the penetration force and depends on the elastic modulus of the material, viscoelastic behavior, the geometry of the indenter, the force applied, and the temperature at the time of testing. The test method is empirical and is therefore primarily used for control purposes. There is no simple relationship between the indentation hardness determined by this test method and any fundamental properties of the material being tested.

ASTM D7735-2017 “高温での熱可塑性舗装標識のタイプ A デュロメータによる硬さ試験の標準試験方法”

ステップ 1: 範囲

1.1 This test method covers the Type A durometer hardness of thermoplastic pavement marking materials at high temperatures.

1.2 This test method is similar in hardness to test method D2240, with special attention to keeping the temperature of the test sample and instrument constant. In the world of highway materials, it is sometimes referred to as “anti-indentation”.

1.3 All materials, 楽器, or equipment used to determine temperature, 硬度, and time shall be traceable to the National Institute of Standards and Technology or other internationally recognized parallel organizations.

1.4 SI単位で表した値を標準値とする。. 括弧内の値は参考値です。.

1.5 この規格は、すべての安全上の懸念に対処することを目的としたものではありません (もしあれば) その使用に関連する. 適切な安全衛生慣行を確立し、使用前に規制上の制限の適用可能性を判断することは、この規格のユーザーの責任です。.

1.6 この国際規格は、国際的に認められた標準化原則に基づいており、 “国際標準開発原則の決定, ガイドラインと推奨事項” WTO貿易の技術的障壁に関する委員会が発行 (未定).