Preparation and characterization of a new kind of nano-rod shaped polycarboxylate slump-retaining admixture using for concrete |
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| Authors: | Guo-rong Duan Guo-hong Huang Ai-mei Li Ye-ran Zhu Ying Gong |
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| Institution: | [1]Research Center on New Materials in Hydraulic Structures of Ministry of Water Resources, Nanjing Hydraulic Research Institute, Nanjing 210024, China [2]Nanjing R ＆ D High Technology Co. Ltd., Nanjing 210024, China |
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| Abstract: | A new kind of nano-rod shaped polycarboxylic acid slump-retaining agent was synthesized. Transmission electron microscope (TEM) experiment showed that the nano-rod was bound together as macromolecular aggregates in solution. Application performance studying suggested that this kind nano-sized polymer material had excellently plasticity-retaining performance in cement-based materials and could improve endurance performance of hardened cement-based materials distinctly. The concrete with an initial slump of 2?C9 cm could achieve 3 h plasticity-retaining performance with the help of this kind nano-rod. The product had extremely wide application value in the market. |
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