Abstract
Super plasticizer was synthesized by using coal coking by product washing oil and industrial naphthalene. The results show that sulfonationt time (2.5 h), sulfonation temperature (160 °C) and condensation time (5.0 h) are key factors. Adding oxidizing agent MO in the course of synthesis can decrease the emission of SO2 in exhaust (20%). Compared with NF, NF-30 have some advantages in lower cost, high water reducing rate (19.7%) and optimum early strengths. Moreover, TGA-DTA and SEM analysis were adopted to research the NF-30 modified concrete on hydyation mechanism. The analysis show that, compared with NF, there are a large number of hydration products such as Ca (OH)2, C-S-H, AFt etc of NF-30, the structure of NF-30 is dense and the performance is good.
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