ATTACHMENT FOR CONCRETE TEST PIECE

PURPOSE:To provide an attachment which is used for performing press test of a concrete test piece using a press testing machine, can be assembled easily, and can withstand a high pressure. CONSTITUTION:The attachment consists of a press lid 12 with a recessed part which is opened on the lower-surface side and an injection port and a delivery port communicating with the recessed part, an auxiliary lid 14 which is a cylindrical body and is formed so that the above press lid is inserted from one-edge side opening where both edges are opened to the stage part of an inner wall and the other edge side opening is engaged to the test piece, and a press plate 13 in a thick flat plate shape for closing the opening of the recessed part of the press lid while it is placed at the above stage part of the auxiliary lid and is included in reference to the lower surface of the above press lid. Then, an adjustment bolt 22 which is screwed into screw holes which are equally divided into at least three portions in the peripheral direction of the side wall of the auxiliary lid and penetrate through the inner-periphery wall and a circular key 24 which is engaged to the tip of the adjustment bolt and appears from the inner-periphery wall toward the center part are provided.