机械力粉磨对再生微粉性能的影响

为提高再生微粉的利用率,对再生微粉进行机械力粉磨处理.研究了超微气流粉碎和振动球磨对再生微粉性能的影响.采用激光粒度分析仪、XRD、SEM和压力试验机对再生微粉的粒径分布、物相构型、微观形貌和砂浆的抗压强度进行表征,并按国标对再生微粉活性指数进行检测.结果表明:气流粉碎机粉磨的再生微粉的粒径分布范围窄、粒形规整、填充效果好、活性高;利用气流粉碎机对再生微粉进行处理,提高了再生微粉的利用率和利用范围.

Effect of Mechanical Force Grinding on the Properties of Recycled Powder

For the purpose of improving the utilization rate of the recycled powder, the recycled powder was treated by mechanical force grinding.The effects on the properties of recycled powders from pulverization and vibration milling were studied.The particle size distribution, phase configuration and micro-morphology of the recycled powders were tested by laser particle size analyzer, XRD and SEM.And the compressive strength of the mortars was tested by the pressure testing machine.The activity of the recycled powder were also calculated according to national standards.The results show that the recycled powder crushed by superfine air pulverizer is of well filling effect and high activity, narrow size distribution and regular particle shape.The processing of the superfine air pulverizer on the recycled powder improves both the utilization rate and the utilization range of the recycled powder.