ASTM D6818-18a,Standard Test Method for Ultimate Tensile Properties of Rolled Erosion Control Products.ASTM D6818-18a pdf free download.
ASTM D6818-18a covers strip test procedures for determining the tensile properties of rolled erosion control products (RECPs).
Referenced Documents
ASTM D76/D76M Specification for Tensile Testing Machines for Textiles;
ASTM D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing;
ASTM E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods;
ASTM E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method;
4. Summary of T’est Method
4.1 A test specimen is clamped in a tensile testing machine and a force applied to the specimen until it breaks. Values for the breaking force and elongation of the test specimen are obtained from machine scales, dials, autographic recording charts, or a computer interfaced with the testing machine. Also, points along the stress-strain curve can be reported.
Report
11. I State that the specimens were tested as directed in Test Method D6818 Describe the material or product sampled and the method of sampling used.
11.2 Report the following for each laboratory sample.
11. 2. I The average breaking force per unit width of accept- able specimens for each test.
11. 2. 2 The average elongation at break of acceptable spe mens for each test.
10. Calculation
10.1 Breaking Force per Unit Width-For each laborator sample, calculate the average of the breaking force observed for all acceptable specimens, that is, the maximum force exerted on the specimen as read directly from the testing machine indicating mechanism, and divide this force by the idth of the strip. The resulting value is expressed in kilonewtons/meter.
10.2 Elongation- For each laboratory sample, calculate the average of the elongation observed for all acceptable specimens, that is, the elongation that corresponds to the maximum force as stated above, as read directly from the testing machine indicating mechanism. The elongation is expressed as a percentage.