Mixing admixture in the pumped concrete can increase the mobility of mixture and reduce pumped concrete slump loses through time.
在泵送混凝土中掺外加剂，能增加拌合物的流动性并降低泵送混凝土坍落度经时损失。
Experiment results showed that compound use of efficient water-reducing admixture and retarding agent can efficiently control the pumped concrete slump loses through time.
试验结果表明，复合使用高效减水剂和缓凝剂，能有效控制混凝土坍落度经时损失。
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