AASHTO T 341:10(2019) Standard Method of Test for Determination of Compression Capacity for Profile Wall Plastic Pipe by Stub Compression Loading

AASHTO T 341:10(2019) Standard Method of Test for Determination of Compression Capacity for Profile Wall Plastic Pipe by Stub Compression Loading. SUMMARY OF TEST METHOD A small sample of pipe wall is compressed between two rigid plates at a controlled rate. Both plates are fixed with respect to rotation. The sample has a longitudinal length of three periods and a chord (circumferential) length of 1.5 times the profile height. Load, displacement (of the load plates), and time data are obtained. The test ends when the ultimate load is exceeded and the level of load begins to decrease. The ultimate load, crosshead displacement at ultimate load, and test time at ultimate load are recorded. SIGNIFICANCE AND USE The maximum load achieved in this test mar he used/br the folloii’ing: To evaluate compression load capacity of profile wall thermoplastic pipe. 5.1.2. To evaluate the manufactured consistency of pipe wall cross-section thickness distribution. APPARATUS Testing Machine—A properly calibrated compression testing machine of the constant-rate-ofcrosshead-rnovement type meeting the requirements of ASTM D695 shall be used to conduct the test. The rate of head approach shall be 0.05 ± 0.01 in./min (1.27 ± 0.25 mm/min). The testing machine shall be capable of compressing the sample to its capacity. The testing machine shall monitor the applied load to accuracy of ±25 lb (110 N). 6.2. Loading Plates—The load shall be applied to the specimen through two parallel steel bearing plates. The plates shall be flat, smooth, and clean. The thickness of the plates shall be sufficient so that no bending or deformation occurs during the test, but shall not be less than 0.25 in. (6.0 mm). The plate length shall equal or exceed the specimen longitudinal length, and the plate width shall not be less than the profile height plus 6.0 in. (150 mm). 6.3. Deflection Indicator—The crosshead displacement shall be measured with a suitable instrument meeting the requirements of ASTM D695, except that the instrument shall be accurate to 0.00 1 in. (0.025 mm). Note 1—Monitoring crosshead motion of the test machine is an acceptable method of recording deflection: however, the test machine flexibility may result in apparent deflection in addition to the specimen deflection. This must be accounted for if the deflection data are used to evaluate strain at maximum load. AASHTO T 341 pdf download.