The IS 13826 Part 3:1993 standard outlines the official procedure for assessing the storage sticking characteristics of bitumen-based felts utilized in waterproofing and damp-proofing. This test determines the likelihood of felt layers adhering to each other under specified temperature and pressure during storage, ensuring the product's quality and performance. It is crucial for manufacturers, testing labs, and construction professionals involved with bitumen felts to verify compliance and durability.
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The IS 13826 Part 3:1993 standard outlines the official procedure for assessing the storage sticking characteristics of bitumen-based felts utilized in waterproofing and damp-proofing. This test determines the likelihood of felt layers adhering to each other under specified temperature and pressure during storage, ensuring the product's quality and performance. It is crucial for manufacturers, testing labs, and construction professionals involved with bitumen felts to verify compliance and durability.
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The storage sticking property refers to the tendency of bitumen-based felt layers to adhere to each other when stacked during storage. This characteristic is important as it affects the handling and usability of the felts in practical applications. IS 13826 Part 3 provides the standardized testing approach to measure this property, ensuring that the felts do not stick excessively and remain easy to separate. This is related to standards such as IS 1322 and IS 7193, which define specifications for different types of bitumen felts. Maintaining appropriate storage sticking properties ensures product integrity and ease of application.
To prepare specimens for the storage sticking test as per IS 13826 Part 3, four samples each measuring 100 mm by 100 mm are carefully cut from the bitumen felt. These pieces are then stacked vertically one on top of the other. A uniform pressure of 0.7 kg/cm² is applied on the stacked specimens, and the assembly is placed inside a controlled temperature chamber set to 55 ± 2°C. The specimens remain under these conditions for 18 hours to simulate storage effects and observe any sticking behavior.
The storage sticking test requires maintaining the test chamber at a temperature of 55 ± 2°C continuously for 18 hours. During this period, a constant pressure of 0.7 kg/cm² is applied on the four stacked test pieces of bitumen felt. After completion, the load is removed, and the specimens are inspected for their ability to separate without damage, in accordance with IS 13826 Part 3 clauses 5.2.1 and 5.2.2.
The specimens must be kept under the specified pressure of 0.7 kg/cm² and temperature of 55 ± 2°C for a total duration of 18 hours. This timeframe ensures consistent evaluation of the storage sticking property as prescribed in IS 13826 Part 3.
Following the 18-hour test under controlled pressure and temperature, the applied load is removed, and the stacked bitumen felt pieces are separated. The evaluation focuses on whether the layers can be pulled apart without causing any damage to the felt coatings. The test is reported as a pass if the layers separate cleanly without harm, or fail if there is any sticking or coating damage. This ensures the felt’s suitability for storage and subsequent application, as per IS 13826 Part 3 guidelines.
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