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BRIQUET TENSILE
TESTING GRIPS (ASTM C 307)
This test method first became an ASTM standard in 1953. The fixture consists of identical upper and lower grips, termed clips in ASTM Standard C 307 (Reference 1), and is designed to determine the tensile strength of specially-shaped briquets of mortar, grout, and similar other monolithic surfacing materials. The above photograph shows a pair of grips, the top grip being viewed from the front side and the bottom grip from the back side. A typical briquet specimen is also shown at the right. The stop plates on the grips center the specimen fore and aft. The specimen is loaded on its four shoulders via the rollers at the ends of the grips. The outer ends of the grips accommodate standard 1.25" diameter male adapters for their attachment to the crosshead and base of the testing machine. The molded briquet specimen is 3" long, approximately 1 3/4" wide at its ends, 1" wide in the central gage section, and of 1" uniform thickness. Specific dimensions are given in ASTM Standard C 307.
One or more
briquet gang molds, typically each containing three cavities, can be
provided upon request. The ASTM standard specifies that six
specimens be prepared for each test period. Full details of molding
test specimens, conditioning them, performing the mechanical
testing, and then reporting the data are given in ASTM Standard C
307. The fixture as supplied by Wyoming Test Fixtures, Inc. conforms
directly to the fixture configuration suggested in the ASTM
standard. 1) 1) ASTM Standard C 307-03 (2003), "Tensile Strength of Chemical-Resistant Morter, Grouts, and Monolithic Surfacings," American Society for Testing and Materials, West Conshohocken, PA (first issued in 1953).
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