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一、复合方案1.GFA(木质素磺酸钙)0.3%+Na_2SO_4(硫酸钠)2%+N(C_2F_4OH)_3(三乙醇胺)0.03%(掺量为占水泥重的百分比)。此方案在保持水灰比不变的条件下,坍落度可增加8～10厘米。在标准养护条件下(20±3℃)保持用水量、水泥用量不变时,3天强度为空白的2.5倍,14天达到设计强度(21l号),28天后增强20%。在标准养护条件下,保持和空白相同的坍落度可减水9.2%,如水泥用量不变,3天强度为空白的2.5倍,7天达到设计标号(211号),
First, the complex scheme 1. GFA (calcium ligninsulfonate) 0.3% + Na2SO4 (sodium sulfate) 2% + N (C_2F_4OH)_3 (triethanolamine) 0.03% (the amount of cement as a percentage of the weight). This solution can increase the slump by 8 to 10 cm while keeping the water-cement ratio unchanged. Under the standard conservation conditions (20±3°C), when water consumption and cement dosage were kept constant, the strength at the 3rd day was 2.5 times the blank, and the design strength (21l) was reached at 14 days, and increased by 20% after 28 days. Under the standard conservation conditions, the same slump as the blank can be reduced by 9.2%. If the cement dosage is not changed, the strength in the 3 days is 2.5 times the blank, and the design number (No. 211) is reached in 7 days.