ASTM C1229Full Name ASTM C1229 – Standard Test Method for Determination of Glass Fiber Content in Glass Fiber Reinforced Concrete (GFRC) (Wash-Out Test)Scope This test method covers determination of the fiber content in an uncured, glass fiber reinforced concrete (GFRC) sample panel.Keywords glass fiber; glass fiber reinforced concrete (GFRC); wash-out testResourcesASTM International Website: ASTM C1229 Need more info?