A novel kind of concrete superplasticizer based on aryl isocyanate polycondensates

17th IUMRS International Conference in Asia

Ding, Bei^1 ; Qian, Shanshan^1 ; Qiu, Ying^1 ; Wang, Yi^1 ; Zheng, Chunyang^1 ; Wang, Gaoming^1

Jiangsu China Railway Arit New Materials Co. Ltd., Nanjing

211505, China^1

关键词: Aryl isocyanates;    Concrete superplasticizer;    Nuclear Magnetic Resonance (NMR);    Plastic viscosity;    Polycondensates;    Polyoxyethylene ether;    Superplasticizers;    Toluene diisocyanates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012045/pdf
DOI  :  10.1088/1757-899X/182/1/012045

来源: IOP

【 摘 要 】

A novel superplasticizer was synthesized by polycondensation of Alkyl phenol phosphate and toluene diisocyanate grafting with methoxy polyoxyethylene ether (MPEG). The chemical structure and molecular weight of polycondensates molecules were determined by1H nuclear magnetic resonance (NMR) and gel permeation chromatography respectively. The experimental results indicated that the polycondensates of Alkyl phenol phosphate and toluene diisocyanate grafting with MPEG not only exhibited good water-reducing properties but also demonstrated effective anti-clay abilities alone. Furthermore, the polycondensates showed good fluidity maintaining abilities within 1-3 h and good workability of concrete. The results of T500 Time experiments show that lower plastic viscosity of the polycondensates leads to fresh concrete much "looser" than conventional PCEs in self-compacting concrete.