It is likely to ensure normal gas transportation of the pipeline by several approaches, such as adding antifreezer, releasing pressure and sphere pigging. 可采取加注防冻剂、放空泄压、清管通球的方法保证该管线的正常运行。
The ice-liquid curve in phase diagram of the antifreezer solution and its formula are deduced from measured value of freezing point. 从冻点测定结果导出了混凝土防冻剂溶液相图中的冰&液平衡线及其数学表达式。
In order to screen antifreezer of peracetic acid used at low temperature, carrier quantitative germicidal test was used to examine the influence of different antifreezers on germicidal action. 为筛选出过氧乙酸在低温条件下使用的防冻剂,以载体定量杀菌试验法测定了不同防冻剂对杀菌作用的影响。
Benefit analysis of development technology of aliphatic liquid pumping antifreezer 脂肪族型液体泵送防冻剂研制技术效益分析
A new concept called "liquid water-cement ratio" and its formula are advanced, which can be used to evaluate liquid water amount in the concrete mixed with antifreezer at negative temperature. 在预拌混凝土的生产中混凝土的凝结时间是一项重要的技术指标,本文试图讨论用水量、水灰比、粉煤灰和外加剂等因素对混凝土凝结时间的影响。
Modification of Antifreezer and Determination of Time for Concrete Pre-curing 防冻剂的改性及冬季施工混凝土最佳预养时间的确定
A Research on Liquid Water-Cement Ratio of Concrete Antifreezer 混凝土防冻剂液灰比研究
The effects of types and amounts of emulsifiers added, alcohols, pH values and solids content on the freeze-thaw stability of carboxylated styrene-butadiene latex were investigated. The recipe of antifreezer was 70% antifreezer ⅰ and 30% antifreezer ⅱ. 考察了后添加乳化剂种类与用量、醇类、pH值、固含量对胶乳冻融稳定性的影响,确定了羧基丁苯胶乳的防冻剂配方(0.7份防冻剂Ⅰ和0.3份防冻剂Ⅱ)。
Analysis of applicability of the standards for using concrete antifreezer 混凝土防冻剂标准的适用性浅析