以下为句子列表：
英文: In order to study the effect of sand ratio (S/A ratio, fine aggregate volume/total aggregate volume) on the elastic modulus of self-compacting concrete (SCC), concretes with various S/A ratios were cast and tested.
中文: 摘要本研究主要探讨混凝土含砂率（S/A，细骨材体积/总骨材体积）对流动化混凝土（SCC）弹性模数的影响。
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