贵州乌江渡和广西大化两水电站工程用石灰岩作大坝混凝土骨料的经验,对我国今后水利水电工程的快速经济施工,具有重要意义。骨料占大坝体积的极大部分。一般约为75%,但由于骨料价格远远低于水泥,所以往往受不到重视。实际上,骨料选择恰当与否,对工程质量、进度和成本有重要的影响。众所周知,对于大体积混凝土坝来说,温度裂缝 The experiences of using limestone as the concrete aggregate of the dam in Guizhou Wujiangdu and Guangxi Dahua two hydropower stations are of great significance to the rapid economic construction of water conservancy and hydropower projects in our country in the future. Aggregate accounts for a large part of the dam’s volume. Generally about 75%, but due to the aggregate price is far lower than the cement, it is often not valued. In fact, the proper selection of aggregates has a significant impact on project quality, schedule and cost. As we all know, for large-volume concrete dam, the temperature cracks