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A
Technical Guidance Manual:
Terminology and
Index Testing Procedures for Rolled Erosion Control Products
19. SMOLDER RESISTANCE
19.1 Scope - This method details a procedure for the determination of the smoldering resistance of degradable rolled erosion control products.
19.2 Summary - The distance between an extinguished cigarette and maximum smolder travel is measured to determine the smoldering resistance of the specimen.
19.3 Significance and Use - Degradable erosion control blanket materials may be susceptible to flammability caused by cigarettes. This is a concern during installation and use. This test method serves to provide an index reading of relative smolder resistance.
19.4 Apparatus
19.4.1 Fan capable of providing 50 feet per minute air velocity (recommended is Matsushita Electronics Model FBP-08B12L, 12 V dc brushless type).
19.4.2 Fire resistant square box having one cubic foot volume and two holes, three inches in diameter, bored through opposing walls and centered 3.5 inches above the bottom edge. Fan is installed in one hole. Hole opposite fan equipped with slotted cover plate attached flush against outer wall to act as a vent louvre. Additional cover plate is provided over fan opening to act as a restricting baffle to control flow and reduce turbulence.
19.4.3 A 57 mm (2.25 in.) Camel Brand Unfiltered Cigarette.
19.4.4 Ruler accurate to 2.54 mm (0.1 in.).
19.5 Sampling - Sample test specimens from across the roll width to ensure representativeness of the test material.
19.6 Test Specimens - Cut three, 305 mm x 305 mm (12 in. x 12 in.) test specimens. Handle the test specimens in a manner to avoid loss of loose filler and weaving components.
19.7 Conditioning - Condition test specimens for 12 hours in an air oven maintained at 45oC. remove and equilibrate in laboratory test conditions for a minimum at 2 hours.
19.8 Procedure
19.8.1 Place test apparatus in hood or otherwise facilitate exhaust of generated smoke.
19.8.2 Place specimen flat on the base of the test box.
19.8.3 Set fan speed to facilitate an air velocity of 50 feet per minute across the center of the sample. Verify velocity with air velocity or wind speed meter.
19.8.4 Place a freshly lit cigarette in the center of the test specimen, with burning end facing the blower fan.
19.8.5 Allow the cigarette to burn completely and extinguish.
19.8.6 Upon extinguishment of the cigarette and sample, measure the maximum distance, in mm, of specimen smolder from the cigarette ashes.
19.8.7 Clean test apparatus and repeat test for each of two additional test specimens.
19.8.8 Report measurements developed for each test specimen as well as the average and standard deviation for the three specimen population.
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