Although alkali resistant glass fibers have been commercially available for more than 30 years, ASTM International reports that there has not been an
Although alkali resistant glass fibers have been commercially available for more than 30 years, ASTM International reports that there has not been an official standard clearly defining what is required to make glass fibers resistant to alkali attack without the need for protective coatings. ASTM International Committee C27 on Precast Concrete Products has recently developed C 1666/C 1666M, Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber-Reinforced Concrete and Cement. The standard is under the jurisdiction of Subcommittee C27.40 on Glass Fiber Reinforced Concrete Made by the Spray-Up Process.
C27 member and Nippon Electric Glass America Division Manager John Jones notes that the new standard is important because AR glass fibers are used in glass fiber reinforced concrete (usually referred to as GFRC), fiber reinforced concrete and other cementitious products where alkali attack is of concern. The specification covers minimum requirements for AR glass fibers intended for use in glass fiber-reinforced concrete by spray-up, GFRC premix, fiber-reinforced concrete and other cementitious based products.
ASTM International standards are available for purchase from Customer Service (phone: 610/832-9585; [email protected]) or at www.astm.org. Additional technical information on C 1666/C 1666M can be obtained from Nippon Electric’s John Jones, 972/602-1740 or [email protected]. Committee membership or meeting information can be obtained from ASTM International’s Joseph Hugo, Technical Committee Operations, 610/832-9740 or [email protected].