Synthesis, working mechanism and effectiveness of a novel cycloaliphatic superplasticizer for concrete
Synthesis, working mechanism and effectiveness of a novel cycloaliphatic superplasticizer for concrete
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DOI：
10.1016/j.cemconres.2011.09.003
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发表时间：
2012-01-01
影响因子：
11.4
通讯作者：
Plank, J.
中科院分区：
文献类型：
--
作者：
Lei, L.;Plank, J.
本研究介绍了一种新型高效减水剂的合成、性能和作用方式。由环己酮、甲醛和亚硫酸盐合成高分子量缩聚物（M(w)约220,000 g/mol）。所得 CFS 超增塑剂通过尺寸排阻色谱法和阴离子电荷密度测量进行表征。通过小型坍落度试验和确定可实现的最大减水量来探讨 CFS 在水泥中的性能。通过吸附和 zeta 电位测量确定了其工作机制。结果表明，CFS 的行为类似于典型的缩聚物高效减水剂，例如 BNS。由于静电斥力，它增强了水泥的流动性。该新型高效减水剂的优点是制备方法简单、低水灰比时有效、减水能力大、在粘土存在下性能稳定。 (C) 2011 Elsevier Ltd. 保留所有权利。
In this study, the synthesis, performance and mode of action of a new type of superplasticizer is presented. From cyclohexanone, formaldehyde and sulfite, a high molecular weight polycondensate (M(w)approximate to 220,000 g/mol) was synthesized. The resulting CFS superplasticizer was characterized by size exclusion chromatography and anionic charge density measurement. Performance of CFS in cement was probed by mini slump test and by determining the maximum water reduction achievable. The working mechanism was identified via adsorption and zeta potential measurements. The results show that CFS behaves like a typical polycondensate superplasticizer such as BNS. It enhances the fluidity of cement due to electrostatic repulsion. Advantages of this novel type of superplasticizer are simple preparation method, effectiveness at low water-to-cement ratio, huge water reducing capability and stable performance in the presence of clay. (C) 2011 Elsevier Ltd. All rights reserved.