减水剂是一种在维持混凝土坍落度基本不变的条件下,能减少拌合用水量的混凝土外加剂。大多属于阴离子表面活性剂,有木质素磺酸盐、萘磺酸盐甲醛聚合物等。加入混凝土拌合物后对水泥颗粒有分散作用,能改善其工作性,减少单位用水量,改善混凝土拌合物的流动性;或减少单位水泥用量,节约水泥。
原创:活性粉末混凝土的配制及性能研究 - 经济法律论文发表 - xzbu.com 中国论文网 关键词: RPC;减水剂;强度 [gap=271]Keywords: RPC; Water reducing agent; strength
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减水剂 (water-reducing admixture) 是指在混凝土和易性及水泥用量不变条件下,能减少拌合用水量、提高混凝土强度;或在和易性及强度不变条件下,节约水泥用量的...
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三、常用混凝土外加剂 (一)减水剂(water reducer):.减水剂的作用机理 水泥加水拌和后,水泥颗粒间分子引力的作用,而产生 许多絮状物形成絮凝结构,在这种结构中水泥颗粒周围 包...
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高效减水剂 superplasticizer ; FDN ; high range water-reducing admixture ; Efficiency water reducer
萘系减水剂 FDN ; XF-V ; naphthalene formaldehyde water reducer
聚羧酸减水剂 Polycarboxylate Superplasticizer ; polycarboxylate water-reducer ; polycarboxylic acid water reducer ; Polycarboxylic copolymer
缓凝高效减水剂 set retarding superplasticizer ; retarding superplasticizer ; setretarder superplasticizer ; retarders as well as superplasticizer
萘系高效减水剂 FDN ; naphthalene based superplasticizer ; polynaphthalene sulphonate ; PNS
高效早强减水剂 Efficient jianshuiji early strength
聚羧酸盐减水剂 Gather carboxylate water-reducing agent
高效泵送减水剂 Efficient pumping water-reducing agent
减水剂MY Water decreasing agent MY
The product can be used as water reducer in concrete. We can find an effective method to use the bark.
该产品可用作混凝土减水剂,为树皮废渣的高效利用提供了依据。
参考来源 - 落叶松栲胶废渣木质素磺酸盐的研制及其理化性能Microanalysis shows:water-reducer restrains hydration of C3S and formation of CH in early age. If there is a proper addition,restraint becomes weaker and weaker with time going.
微观结构分析表明,减水剂进入水泥体系后,抑制了C3S的水化及CH的形成,掺量适中时,对后期水化的抑制作用渐渐消失。
参考来源 - 功能可控型聚羧酸减水剂的研究与应用A new polyethylene glycol grafting polycarboxylic water-reducing agents(water-reducing agent I)was prepared using methoxy polyethylene glycol itaconate(IMPEG)as a large monomer.
以甲氧基聚乙二醇衣康酸单酯(IMPEG)为大单体,合成出了一种新型的聚乙二醇接枝聚羧酸减水剂(减水剂I)。
参考来源 - 新型聚乙二醇接枝聚羧酸减水剂的制备In this paper, acrylic graft copolymer-based new high-range water reducing agent (superplasticizers) ACS for concrete was prepared, which exhibits good dispersive and dispersion maintaining effects on cement grout.
根据聚合物分子设计原理,通过乙烯类单体的自由基溶液共聚合制备了分子链中含阴离子基团和支链的共聚物,制备了对水泥颗粒具有良好分散作用和分散稳定作用的混凝土用丙烯酸接枝共聚型高效减水剂(ACS)。
参考来源 - ACS新型高效减水剂的研究(1)The adoption of silicon-concrete is to mix silica flour and compound high-efficient water-reducing agent in the ordinary concrete in order to find the approach to improve the intensity of HPC.
采用硅粉混凝土,即在普通混凝土中掺硅粉与复合高效减水剂,找到提高强混凝土强度的途径。
参考来源 - 辽宁省大窑湾疏港高速公路桥面铺装硅粉混凝土探讨与研究·2,447,543篇论文数据,部分数据来源于NoteExpress
初步探讨了聚羧酸减水剂提高混凝土抗劈裂性能机理。
Discussed initially the mechanism of polycarboxylic water-reducer improve performance of cracking-resistance of concrete.
聚羧酸系高性能减水剂是减水剂的新品种,具有很多良好的使用性能。
Polycarboxylic acid is a new kind of high performance water-reducing agents which have many useful properties.
结果表明:该产品减水剂具有优良的工作性能、高减水性、混凝土性能等特性。
The result shows this low slump loss superplasticizer features in easy action property, high water reducing rate, and good performance of concrete, etc.
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