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由于我局在镇海及北仑港码头冬季施工时混凝土的特殊要求,我们收集并对比了多方面的资料,并参照以往的经验认为以减水剂MF复合早强剂硫酸钠或硫代硫酸钠较为可行,同时也用三乙醇胺作些对照,并对磺化洗油作了些摸索。 按照现场的要求,此项复合早强减水剂的技术指标为:5℃气温下4天,10℃下3.5天,15℃下3天使混凝土强度达到设计标号的70％。
Due to the special requirements of concrete in the winter construction of Zhenhai and Beilun Port wharves, we collected and compared many aspects of the data, and with reference to past experience that the superplasticizer MF superplasticizer sodium sulfate or sodium thiosulfate is more Feasible, but also triethanolamine as a control, and made some exploration of sulfonated oil. According to the site requirements, the composite early strength water reducer technical indicators: 5 ℃ temperature for 4 days, 10 ℃ for 3.5 days, 15 ℃ for 3 days to make the concrete strength of 70% of the design label.