ASTM D5095-91(2022) PDF

Overview

ASTM D5095-91(2022) is the international standard test method established by ASTM International for the determination of the nonvolatile content in silanes, siloxanes, and silane-siloxane blends used in masonry water repellent treatments. This method is essential in ensuring the quality, performance, and regulatory compliance of water-repellent solutions applied to masonry surfaces. The test applies to both solvent-borne and water-borne materials, supporting precise calculation of volatile organic compound (VOC) content, which is increasingly significant in meeting environmental guidelines.

Key Topics

• Nonvolatile Content Determination: The method outlines a controlled procedure for quantifying the percentage of nonvolatile matter in silane, siloxane, and blended formulations, which directly influences the effectiveness and durability of water repellents.
• Testing Procedure: The standard requires the weighing of the sample with a catalyst solution, incubation at room temperature, and subsequent heating at a specified temperature and duration to drive off volatile components. The nonvolatile residue is then calculated by subtracting the weight of the catalyst solution’s solids.
• Precision and Variability: ASTM D5095-91(2022) includes guidance on repeatability and reproducibility, allowing laboratories and manufacturers to assess the reliability of measurements. It provides criteria for acceptable variance between test results within and between laboratories.
• Safety and Compliance: The standard emphasizes the importance of adequate ventilation and lab safety, especially due to the use of solvents and reactive materials. Users must assess and mitigate any specific hazards associated with their processes.

Applications

• Quality Control in Manufacturing: Producers of masonry water repellents use this standard method to verify product formulation consistency and confirm the correct proportion of active silane, siloxane, or their blends.
• Regulatory Compliance: The determined nonvolatile content enables calculation of VOC content, helping manufacturers meet environmental regulations and industry standards related to emissions and worker safety.
• Product Development and Formulation: Chemical formulators rely on this method to optimize the balance between performance (water repellency, longevity) and environmental impact. The procedure supports innovation in developing low-VOC and sustainable masonry protection solutions.
• Performance Assessment: Construction professionals and material specifiers use nonvolatile content data to select suitable water repellent treatments based on durability requirements and substrate compatibility.

Related Standards

• ASTM D1193: Specification for Reagent Water, applicable for chemical purity in tests.
• ASTM E145: Specification for Gravity-Convection and Forced-Ventilation Ovens, required for controlled heating.
• ASTM D3980: Practice for Interlaboratory Testing of Paint and Related Materials (reference for precision and bias evaluation).
• Water Repellent Standards: ASTM develops additional standards for masonry treatments, which may complement D5095 method outcomes.
• International Standardization: Developed following World Trade Organization (WTO) principles for global acceptance and harmonization.

Keywords: masonry water repellents, nonvolatile content, ASTM D5095, silanes, siloxanes, silane-siloxane blends, VOC content, standard test method, solvent-borne, water-borne, quality control, regulatory compliance

This standard is invaluable for ensuring the effectiveness, compliance, and sustainability of masonry water repellent treatments worldwide. For more detailed procedures and requirements, refer to the full ASTM D5095-91(2022) document available from ASTM International.