| 摘要 |
PROBLEM TO BE SOLVED: To collect a test piece as uncompressed mortar and a test piece as swollen mortar by a method wherein a lid in which a small drainage and ventilation hole is bored and formed, and a container in which parallel separation grooves and separation tabs are arranged are bonded by grip hinges and bored fixation tabs. SOLUTION: A lid 1 and a container 2 are formed by the mold injection molding operation of a synthetic resin. A rib 6 for reinforcement is installed on the surface of the lid 1. Small drainage and ventilation holes 3 are bored and formed in the lid 1. Grip hinges 5 are arranged and installed in the outer circumferential part of the lid 1. Fixation tabs 8 are arranged and installed in the outer circumference of the opening part of the container 2. In addition, parallel separation grooves 9 and bored separation tabs 7 by which a test piece is separated easily are arranged on the outer face of the container 2. Then, when the test piece is collected, mortar is poured into the container 2, the grip hinges 5 and the fixation tabs 8 are engaged, and the lid 1 and the container 2 are bonded so as to be installed in a place which is parallel to the ground and which is solid. At this time, the small drainage and ventilation holes 3 for freezing-water discharge prevent the formation of a foamed weak-strength layer which is formed in the upper part of the test piece. In addition, the lid 1 can endure a swelling force when the mortar is hardened because the grip hinges 5 are bonded to the fixation tabs 8.
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