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哥伦比亚郡的I－75号公路是哥伦比亚郡最大的超级路面工程。该工程的配合比设计和质量控制由湖城（LAKECITY）的沥青技术公司承担，原批准在工程中采用的S－Ⅰ和S－Ⅱ配合比经受了超级路面研究工程专用的回转式压实机（SGC）的检验，以确定其是否符合超级路面标准。检验发现两
Columbia County’s I-75 is the largest super pavement in the county of Columbia. The mix design and quality control of the project was undertaken by LAKECITY’s Asphalt Technology Company and the original approval for the S-I and S-II mix used in the project was subjected to the Rotary Compaction Machine SGC) test to determine whether it meets the super-pavement standards. Test found two