water-reducing admixture

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。

Study on CJ-1 high-efficient compound water-reducing admixture

CJ&1复合型高效减水剂的研究

A Study on Pavement Performance of Road Concrete Mixed with Water-reducing Admixture

掺复合减水剂道路混凝土路用性能研究

The application of compound water-reducing admixture in corrosion resistance concrete

复掺减水剂在钻孔桩水下耐腐蚀混凝土中的应用

Study on Effect of the Main Cement Characteristic to Compatibility of Water-reducing Admixture with Cement

水泥主要特性对水泥与减水剂适应性影响的研究

NF model High-effective concrete water-reducing admixture was investigated in this paper .

本文研究了NF型高效水泥减水剂，探讨了减水剂的组成、性质和减水机理。

Studies on the System of Lignosulfonate Derivatives as Water-reducing Admixture for Concrete

木素磺酸盐衍生物用于混凝土减水剂体系的研究

Technological Study on Producing Water-reducing Admixture with Industry Naphthalene

工业萘生产减水剂的工艺研究

Research and application of polycarboxylates high performance water-reducing admixture on the normal medium-low grade concrete

聚羧酸系高效减水剂在中低强度等级混凝土中的研究与应用

Polycarboxylates High Performance Water-Reducing Admixture and Concrete Quality

浅谈《聚羧酸系高性能减水剂》标准与混凝土的质量控制

Experiment and application of early strength water-reducing admixture for cement mortar of high pressure filling pile in cold region

寒冷地区高压注浆桩水泥浆掺减水早强剂的试验与应用

The main existed problems at present of the industry are pointed out , and the development directions of the national polycarboxylicates water-reducing admixture industry are discussed .

从我国聚羧酸系减水剂工业的研究、生产、销售和应用等方面分析了其发展现状，指出了目前发展存在的主要问题，并探讨了聚羧酸系减水剂工业发展方向。

The results indicated that the higher the density of content is , the better the impermeability and carbonation resistance are . High-performance concrete added with polycarboxylate-based water-reducing admixture have good impermeability .

研究结果表明，混凝土的密实度越高，混凝土的抗渗性能及抗碳化性能越好，采用聚羧酸盐高效减水剂配制的高性能混凝土具有良好的抗渗性；

In base of action mechanisms of concrete water-reducing admixture , the paper introduces the application of water-reducing admixture in engineering , and gives some problems that should be paid attention to in the use of water-reducing admixture .

文中从砼减水剂的作用机理出发，介绍掺减水剂砼在工程上的应用，提出使用减水剂应该注意的一些问题。

The tests results show three types of water-reducing admixture all increase concrete early-age shrinkage by 200 % - 300 % and whole shrinkage by 80 % - 90 % , beyond the amplitude of specification at present .

研究结果证明，三类减水剂都增大了混凝土的早期收缩且增幅较大高达200%-300%，最终总收缩增幅达80%-90%，远远超过现行规范规定的收缩比。

The thermal shock resistance of the refractory casting with low cement content is improved greatly because of the addition of micropowder SiC together with Silica fume and high-efficiency water-reducing admixture , but the compressive strength after calcine at 1450 ℃ is decreased .

在采用硅灰和高效减水剂的低水泥浇注料中掺加SiC微粉后，显著改善了浇注料的抗热震性，但降低了1450℃烧后抗压强度。

The results show that air entraining admixture and shrinkage-reducing admixture can decrease surface tension of water and Ca ( OH ) 2 solution observably . Water-reducing admixture can reduce surface tension of water but has no notable effects on surface tension of saturation calcium hydroxide solution .

研究表明，引气剂、减缩剂可以大幅降低水及饱和Ca（OH）2溶液的表面张力，减水剂可以降低水的表面张力，但在饱和石灰水中表面活性碱弱。

The average amount of ammonia emission was 0.071 % , 0.070 % , 0.069 % for water-reducing , admixture anti-freezing admixture , early strength admixture respectively , which showed no statistical difference ( P > 0.05 ) .

减水剂、防冻剂、早强剂氨释放量均值分别为0.071%，0.070%，0.069%，差异无统计学意义（P>0.05）。