An original numerical calculation method for impacting contact model of spur gear under lightly loaded condition

Meccanica - In this study, an impacting contact model of spur gear under lightly loaded condition is constructed by considering the pinion and the wheel as rigid body, in which the lubricant is...     

Effect of the fineness of copper slag on the early hydration properties of cement–copper slag binder

Journal of Thermal Analysis and Calorimetry - In this experimental work, a comparative study of convective heat transfer and drop in pressure characteristics of Alumina–Cu/water and...     

Hydration heat evolution of high-belite cement–phosphate slag binder

The influence of phosphate slag with different finenesses and activators on the hydration of high-belite cement has been studied by using the hydration heat of binders, the DTA curves, the SEM images, and the specific strength. Results indicated that doped phosphorus slag in the cement will reduce heat of hydration. The activity of phosphate slag was low at early stage, but pozzolanic activity of phosphorus slag is higher than that of fly ash. Increasing the specific surface area and curing time and using Ca(OH)₂ combined with gypsum can clearly promote the hydration degree of phosphorus slag. The findings in this paper show that since phosphorus slag can promote the hydration of high-belite cement, the strength contribution of cement is increased. Moreover, the greater the specific surface area is, the more significant the promotion effect at 90 d is.