ASTM E2098/E2098M-13(2023) PDF

Overview

ASTM E2098/E2098M-13(2023) is the international standard test method for determining the tensile breaking strength of glass fiber reinforcing mesh used in Class PB Exterior Insulation and Finish Systems (EIFS), specifically after exposure to a sodium hydroxide solution. Developed by ASTM International, this standard ensures a consistent methodology for evaluating the alkali resistance of glass fiber mesh products, which are widely used to reinforce EIFS and protect wall assemblies.

The test method is critical for manufacturers, quality assurance professionals, and specifiers in the building construction industry, as it provides a laboratory-based assessment of how exposure to alkaline environments-such as those created by portland cement-based base coats-affects the durability and performance of glass fiber mesh in EIFS installations.

Key Topics

• Glass Fiber Reinforcing Mesh in EIFS Glass fiber meshes provide essential structural support to EIFS. When embedded in base coats containing portland cement, these meshes are exposed to alkaline conditions, potentially reducing their tensile strength over time.

• Tensile Breaking Strength Measurement The standard outlines procedures for measuring the force required to break glass fiber mesh specimens, both before and after 28-day immersion in a 5% sodium hydroxide solution. This comparative approach determines the alkali resistance of the material.

• Test Methodology & Reporting The procedure includes specimen preparation, exposure to sodium hydroxide, tensile testing, and reporting of breaking strength both as force per unit width and as a percentage relative to unconditioned specimens. Separate results are reported for warp and fill directions to ensure a comprehensive assessment.

• Units of Measurement Results are measured and reported in both SI and inch-pound units, but users must not combine values from different measurement systems.

• Laboratory Evaluation The test is designed for controlled laboratory settings and does not represent actual in-service conditions. Real-world EIFS performance depends on several factors beyond mesh alkali resistance, such as installation quality and building design.

Applications

• Material Quality Control Manufacturers use this standard to ensure their glass fiber reinforcing meshes meet necessary alkali resistance requirements.

• Product Comparison and Specification Specifiers and quality control professionals employ ASTM E2098/E2098M-13(2023) results to compare products, confirm compliance with industry guidelines (such as those from the EIFS Industry Members Association), and select suitable materials for EIFS applications.

• Research & Development R&D teams utilize this method during the development of enhanced mesh products with improved durability against alkali exposure.

• Regulatory and Certification Needs Building owners, code officials, and regulatory bodies may reference test data generated per this test method to verify that reinforcing meshes used in EIFS assemblies meet project or code requirements for long-term performance.

Related Standards

This standard is closely associated with other key test and terminology standards in the field, including:

• ASTM D76/D76M – Specification for Tensile Testing Machines for Textiles
• ASTM D579/D579M – Specification for Greige Woven Glass Fabrics
• ASTM D5035 – Test Method for Breaking Force and Elongation of Textile Fabrics (Strip Method)
• ASTM E631 – Terminology of Building Constructions
• ASTM E2110 – Terminology for Exterior Insulation and Finish Systems (EIFS)
• EIMA Guideline Specification for EIFS, Class PB – Industry guidelines for exterior insulation and finish systems

By following ASTM E2098/E2098M-13(2023), stakeholders in the construction and building materials industry can achieve consistent, reliable assessments of glass fiber mesh performance-supporting durable and resilient EIFS wall systems worldwide.