ASTM C1666/C1666M-08(2023)
Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement

Standard No.

ASTM C1666/C1666M-08(2023)

Release Date

2023

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C1666/C1666M-08(2023)

Scope

1.1 This specification covers minimum requirements for alkali resistant (AR) glass fibers intended for use in glass fiber-reinforced concrete (GFRC) by spray-up, glass fiberreinforced concrete premix, fiber-reinforced concrete, and other cementitious based products. 1.2 This specification provides for AR glass fiber types and configurations that can be readily incorporated into concrete mixes, typical physical properties, minimum zirconia content, and prescribes testing procedures to establish conformance to these requirements. 1.3 This specification does not address the types of coatings or lubricants used in the manufacturing process of the fibers. 1.4 In the case of conflict between a more stringent requirement of a product specification and a requirement of this specification, the product specification shall prevail. In the case of a conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail. The purchase order requirements shall not take precedence if they, in any way, violate the requirements of the product specification or this specification; for example, by the waiving of a test requirement or by making a test requirement less stringent. 1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM C1666/C1666M-08(2023) Referenced Document

• ASTM D1577 Standard Test Methods for Linear Density of Textile Fibers
• ASTM D2256/D2256M Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method
• ASTM D3800 Standard Test Method for Density of High-Modulus Fibers
• ASTM D4963/D4963M Standard Test Method for Ignition Loss of Glass Fiber Strands and Fabrics
• ASTM D578/D578M Standard Specification for Glass Fiber Strands*， 2023-06-01 Update
• ISO 1887 Textile glass - Determination of combustible-matter content
• ISO 1888 Textile glass — Staple fibres or filaments — Determination of average diameter
• ISO 1889 Reinforcement yarns - Determination of linear density
• ISO 3341 Textile glass - Yarns - Determination of breaking force and breaking elongation

ASTM C1666/C1666M-08(2023) history

• 2023 ASTM C1666/C1666M-08(2023) Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement
• 2008 ASTM C1666/C1666M-08(2015) Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement
• 2008 ASTM C1666/C1666M-08 Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement
• 2007 ASTM C1666/C1666M-07 Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement