渔洞水库大坝为细骨料混凝土砌石坝,需砂料16.5万立方米.但昭通县附近100～200公里范围内缺乏适于拌制混凝土的天然砂料,我们决定采用坝址下游6公里的下二迭统阳新灰岩轧制人工砂.室内试验表明,人工砂具有良好的经济指标,细度稳定,级配好,且用它配制的混凝土比天然砂配制的混凝土力学性能更优越.如在人工砂混凝土中掺用外加剂,经济效果更十分显著. The Yudong Reservoir Dam is a fine aggregate concrete masonry dam with 165,000 cubic meters of sand. However, there is a lack of natural sand suitable for mixing concrete in the range of 100 to 200 kilometers near Zhaotong County. We decided to use the dam downstream 6 The lower two superimposed Yangxin limestone rolling artificial sand. Laboratory tests show that artificial sand has good economic indicators, fineness is stable, and the gradation is good, and the concrete prepared with it has better mechanical properties than natural sand. If the admixture is used in artificial sand concrete, the economic effect is very significant.