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近年来随着国家对水电项目投资的增加,陕西区域也加大了对汉江、旬河的水利资源开发,目前汉江旬阳水电站项目和旬河抽水蓄能电站已经开工建设。大坝建设是水电项目最为重要的一项工程,若使用普通水泥浇筑大坝等大体积混凝土一般平均收缩在0.02%~0.035%,180 d收缩平均在0.04%~0.06%。为了消除应力、收缩等造成的裂缝,大坝的建设不管是常态混凝土还是碾压混凝土都需要用到有微膨胀
In recent years, with the increase of national investment in hydropower projects, the development of water resources in Han River and Xunhe has also been increased in Shaanxi Province. At present, the construction of the Xunyang Hydropower Project in Hanjiang River and the Xunhe Pumped Storage Power Station have started. Dam construction is one of the most important projects in hydropower projects. Generally, large-volume concrete such as ordinary cement pouring dam generally shrinks from 0.02% to 0.035% and shrinks on average by 0.04% to 0.06% after 180 days. In order to eliminate the cracks caused by stress, shrinkage and so on, the dam construction needs to be slightly expanded whether it is normal concrete or roller compacted concrete