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Effect of activator types on cement mortar with polymeric aluminum chloride waste residue
Ping Xu,Yuhao Cui,Dong Han,Minxia Zhang,Yahong Ding Techno-Press 2023 Advances in concrete construction Vol.15 No.3
Water glass (WG) and sodium sulfate (SS) were used to prepare polymeric aluminum chloride residue cement mortar (PACRM) by single and compound blending with polymeric aluminum chloride waste residue, respectively. The structural strength and textural characteristics examinations showed that PACRM consistency increased by incorporating WG, but decreased by incorporating SS. When WG and SS were compounded, the mortar consistency initially rose before falling. The compressive strength of PACRM increased and then decreased as WG was increased. The mechanical properties of PACRM were better enhanced by SS than WG, showing no strength deterioration. The main reason for the improved mechanical properties of polymeric aluminum chloride waste residue in the presence of activators is the increased precipitation of reactive substances, such as C-S-H gels, calcium silica, and Ca(OH)<sub>2</sub>. The density of the specimens with PACRM and the degree of aggregation of hydration products were significantly enhanced by generating more hydration products in the mortar. Further, the cracks and pores were significantly reduced, and the matrix structure was continuous and dense at 5% SS doping and 3% compound doping.
Design and Optimization of a Novel External-Rotor Axial Flux Motor for In-Wheel Application
Chang Jiujian,Yu Kaijie,Ding Yuhao,Lu Xuetao 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.4
This paper proposed a new external-rotor yokeless and segmented armature axial fl ux machine applied in-wheel traction. The loss analysis for the motor cooling casing is performed based on fi nite-element method, and the height of the cooling fi ns is optimized to decrease the eddy current loss and increase the effi ciency of the motor. Subsequently, epoxy potting is developed to increase the heat transfer effi ciency. On this basis, thermal analysis is conducted to verify the temperature of the stator. Finally, the in-wheel motor is manufactured and tested, and the measured data matches well with the results of the electromagnetic and thermal analysis. Compared with the radial fl ux PM (RFM) motor in the same volume, the peak torque and peak power of the YASA are 1.67 times and 1.3 times of the RFM respectively.