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Preparation of Snow Melting Anti-Condensation Material for Asphalt Pavement

Jiang Chuandong, Cong Yufeng, Zhang Xiaoli, Huang Wei

Abstract （596）

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A snow melting anti-condensation ice material for road asphalt pavement is prepared by using aluminum oxide as the carrier and acetate as the anti-condensation active material. The effects of the mass ratio of calcium acetate and magnesium acetate on the freezing point of the prepared materials,the adsorption effect of the three carriers and the amount of hydrophobic agent added on the precipitation of acetate were investigated,and the effect of anti-freezing and snow melting was investigated. The structure and stability of the prepared materials were characterized by infrared spectroscopy and thermogravimetric analysis. The results show that the mass ratio of medium calcium acetate and magnesium acetate in the anticondensation ice material is 1∶2,the self-made Al ₂O ₃ carrier is used. When the mass fraction of silicone hydrophobic agent is 9%,the high temperature stability of the snow melting anticondensation ice material is better. It has a good effect of suppressing ice and snow.

2018, 38 (06): 43-47. DOI: 10.3969/j.issn.1672-6952.2018.06.008

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Development of a Type of Polymeric Mannich Bases

Zhang Shouqing,Huang Wei,Li Fei,Cong Yufeng,Zhang Xiaolin

Abstract （719）

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A new type Mannich base was developed by the reaction of binary copolymer AM/C ₉ synthesized from C ₉ petroleum fractions with acrylamide as raw materials. The effects of reaction time, reaction temperature, pH of solution and ratio of aldehyde were studied. The apparent viscosity of Mannich was characterized by IR spectroscopy and its structure is characterized. Finally, the performance of the product is analyzed. The results show that the optimum reaction conditions were as follows: The reaction time is 4 h, the reaction temperature is 70 ℃, the pH is 9 and the ratio of dimethylamine to formaldehyde was 1.5. The result of infrared spectrum characterization shows that the product has been synthesized. Synthetic Mannich base has higher viscosity, temperature and salt tolerance compared with traditional HPAM.

2018, 38 (03): 19-22. DOI: 10.3969/j.issn.1672-6952.2018.03.004

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Method of the Lifetime Prediction for Thermo Mechanical Fatigue in NickelBased Superalloy

ZHANG Xiaoling，LIU Feng，LI Junjun

Abstract （365）

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Frequency modified method, Ostergren method, the energy method of three parameter power function and the simplified energy method were chosen to predict TMF life in three nickelbase superalloys. And the prediction ability of them was assessed. The results indicat that the above methods could predict the TMF life of three nickelbase superalloys at some extent. The simplified energy method among the method was the best. The main damage mechanism of TMF was partly similar to isothermal fatigue. According to quantitative evaluation of life prediction ability to the model, the effect of fatigue lifetime prediction on outofphase was better than inphase only when the plastic deformation was considered. What's more, the simplified energy method which was based on the law of energy conservation had the rationales. And the prediction capability of that method was better than the other methods. Therefore, it was suitable to forecast the lifetime of TMF in nickelbased superalloy.

2013, 33 (4): 65-69.