Study on unusual deterioration of concrete servicing in acid environment

本文对混凝土在酸性环境下的异常劣化现象进行了研究。首先对各种混凝土的劣化部位进行了检查。然后选取T坝和S坝作为异常劣化部位的代表。特别是通过对S大坝廊道和T坝浇水方式的调查，推测了坝体的劣化机理。研究结果表明：普通大坝混凝土中可能会出现一些硫酸劣化现象。坝上面朝坝湖，硫酸盐水泥宜与排水沟、温泉区混凝土同等使用。

In this study, unusual deterioration of concrete servicing in acid environment was investigated. The deterioration sites of various kind of concrete were inspected at first. Then T dam and S dam were selected as the representation of unusual deterioration site. Especially, the deterioration mechanism was presumed from the results of an investigation in the corridor of S dam and the watering way of T dam. As the results, the followings were revealed. Some sulfuric acid deteriorations could arise in common dam concrete. On upper side of dam which faces the dam lake, the sulphate reisting cement should be better to be used in the same way as the concrete in drain and hot spring area.