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三峡工程的混凝土方量很大,需用砂料达一千多万方。选择经济上合理而又符合技术要求的料源,是十分重要的工作。我办从五十年代开始,就着手勘探和试验研究。先后对天然砂、乐天溪一带的风化砂做了混凝土试验和其它指标研究;近年来又进行了灰岩制砂的研究。这些工作,为三峡工程选择料源提供了较充分的技术依据。但考虑到在已定利用三峡工程基坑花岗岩轧制粗骨料的基础上同时制砂,在保证混凝土质量符合设计要求的前提下,可以大大简化运输设施和
The amount of concrete in the Three Gorges Project is very large, requiring more than 10 million cubic meters of sand. Choosing a source that is economically sound and meets the technical requirements is a very important task. Since the 1950s, I have been engaged in exploration and experimental research. Successively made tests on concrete and other indicators of weathered sand in natural sand and Lotte Creek. In recent years, researches on sand production in limestone have been carried out. These works provide a more adequate technical basis for the selection of materials sources for the Three Gorges Project. However, taking into account the use of the Three Gorges Project foundation granite rolling coarse aggregate based on the simultaneous sand, to ensure that the quality of the concrete conforms to the design requirements of the premise, can greatly simplify the transport facilities and