Overview
ASTM D6136/D6136M-15(2021): Standard Test Method for Kerosine Number of Unsaturated (Dry) Felt by Vacuum Method provides a standardized procedure to determine the relative saturating capacity of unsaturated (dry) roofing felt papers. This test method is essential for manufacturers, quality control professionals, and roofing specialists as it measures the absorption properties of felt-a critical performance factor for roofing materials that are later saturated with asphalt or similar products.
The kerosine number derived from this method quantifies how much kerosine unsaturated roofing felt can absorb, serving as an indicator for its capacity to absorb hot asphalt during manufacturing. The test employs a vacuum method to ensure accurate and repeatable results, supporting material selection and quality assurance in roofing product manufacturing.
Key Topics
- Kerosine Number Determination: The method measures the amount of kerosine absorbed by roofing felt expressed as milliliters per 100 grams of felt, providing a direct measure of saturant uptake capacity.
- Testing Procedure: Felt strips are dried, weighed, immersed in kerosine under vacuum, reweighed, and the kerosine number is calculated. The method ensures displacement of air from the felt for accurate absorption results.
- Units and Reporting: Results can be reported in SI or inch-pound units, but not combined. The method requires average tracking across two determinations to three significant figures.
- Safety Considerations: The test uses flammable kerosine-safe laboratory practices and local regulatory compliance are essential.
- Saturation Efficiency: The kerosine number serves as a fundamental parameter in calculating the efficiency of the saturation process, helping to optimize roofing felt performance and consistency.
Applications
- Quality Control in Roofing Felt Manufacturing: Used to verify that unsaturated felts meet specified absorption performance before bituminous saturation.
- Material Comparison and Selection: Enables comparison of different felts' absorptive capacities to select optimal materials for various roofing applications.
- Process Optimization: Supports process adjustment in bituminous and asphalt roofing production lines by offering measurable benchmarks for felt saturation.
- Regulatory and Standards Compliance: Assists manufacturers in demonstrating that roofing felts conform to industry and international standards, supporting global market access.
- Research and Development: Used in R&D environments to assess the impact of new materials or treatments on felt saturation properties.
Related Standards
Several ASTM standards are referenced or closely related to ASTM D6136/D6136M, including:
- ASTM D585 – Practice for Sampling and Accepting a Single Lot of Paper, Paperboard, Fiberboard, and Related Product
- ASTM D1298 – Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
- ASTM D3699 – Specification for Kerosine
These standards provide supporting methods for sampling, test liquid specification, and density measurement, ensuring accuracy and harmonization across roofing material tests.
Summary
ASTM D6136/D6136M-15(2021) is a vital standard for assessing the absorptive performance of unsaturated roofing felts, supporting the delivery of high-quality, reliable, and compliant roofing products. Through precise kerosine number determination by vacuum method, it empowers manufacturers, specifiers, and researchers with actionable data for improved roofing system performance and market competitiveness. For best outcomes, always employ the latest edition and adhere to safety and compliance guidelines.