1 Whether it is uphill or downhill, the bottom layer of the asphalt mixture must be clean and dry, and the asphalt binder layer must be sprayed to avoid slipping of the mixture during rolling. 2 Whether it is uphill crushing or downhill rolling, the drive wheel of the roller should be behind. This has the following advantages: when going uphill, the rear drive wheel can withstand the driving force provided by the ramp and the machine itself, while the front wheel preliminarily compacts the road surface to withstand the large shear force generated by the drive wheel. When going downhill, the impact force generated by the self-weight of the roller is offset by the braking of the driving wheel. Only the mixture after rolling by the front wheel has the ability to support the driving wheel to generate shearing force. 3 When rolling uphill, the roller should be stable in starting, stopping and accelerating, avoiding the speed being too high or too low. 4 Before rolling up the slope, the mixture should be cooled to the specified low temperature, and then static preloading. When the temperature of the mixture drops to the lower limit (120 °C), the vibration compaction is adopted. 5 Downhill rolling should avoid sudden shifting and braking. 6 When carrying out downhill crushing under steep slope conditions, the light roller should be used for pre-pressing, and then compacted by heavy-duty roller or vibratory roller. The goal of the grinding and polishing step is to prepare the final polished sample without deformation and suitable for analysis. This can be done in a number of ways depending on the overall objectives of the laboratory. Whether the lab is looking for the fastest overall process, the best surface finish or the versatility to prepare many different materials, Buehler can provide the solution for your grinding and polishing needs. Polishing Consumables,Grinding Sandpaper Metallography ,Belt Grinding Sample ,Polishing With A Grinder TROJAN (Suzhou) Technology Co., Ltd. , https://www.trojanmaterials.com