报告了四种商用高效减水剂（超级增塑剂）的试验结果，这些减水剂用于1型水泥混凝土混合料，含标称水泥含量。该报告提供了外加剂对出血、沉淀时间等方面影响的信息

Reports test results of study made on four commercially available high-range water reducers (super plasticizers) used in Type 1 cement concrete mixes w/ nominal cement contents. The report provides info on admixture effects on bleeding, settling time, et