摘要: This summary provides a brief description of an effort to develop a realistic material specification closely related to the actual field performance of sealers. A method for testing the life expectancy of preformed elastomeric bri... 展开 This summary provides a brief description of an effort to develop a realistic material specification closely related to the actual field performance of sealers. A method for testing the life expectancy of preformed elastomeric bridge sealers was developed in the process of the research. Data gathered through such testing has estabished significant nonumiformity in the quality of preformed sealers. This deficiency is believed to be a consequence of a general lack of sufficient uniformity in the production of synthetic rubber products. As a result of these and numerous other laboratory tests, it was determined that the Department's current sealer specification, although having served to insure product quality on many occasions, evidently has failed in a significant number of instances to identify a sealer's total inadequacy for its intended purpose. However, the research indicated that, except for the addition of the compression set test and an upgrading of the minimum pressure requirement, most physical requirements in the subject specification cannot be improved. Unfortunately, the ultimate solution to the critical problem of identifying adequate sealers for bridge decks remains essentially unestablished. The task of quality assurance therefore still rests for the most part with the sealer manufacturers and their rubber specialist. 收起