基于田口方法的橡胶砂浆受风沙冲蚀性能

Sand erosion performance of rubber mortar based on Taguchi method

针对内蒙古中西部风沙环境特征,利用模拟风沙环境侵蚀实验系统,采用L16(54)田口方法进行实验设计,研究了不同橡胶粒径和掺量的橡胶砂浆在风沙环境下的冲蚀磨损行为,应用SEM观测橡胶砂浆冲蚀后的微观形貌。结果表明:在冲蚀速度为17m/s、橡胶粒径为1.70mm、橡胶掺量为5%、冲蚀角度为45°和下沙量为45g/min的条件下,橡胶砂浆的冲蚀率最小;下沙量和冲蚀速度是影响橡胶砂浆冲蚀磨损性能的显著因素;相同冲蚀条件下,各粒径的橡胶砂浆冲蚀率大小为:1.70mm的橡胶砂浆<普通水泥砂浆<0.18mm的橡胶砂浆<0.42mm的橡胶砂浆;橡胶砂浆的冲蚀磨损主要体现为沙粒对其表面的切削和挤压作用,其中1.70mm的橡胶颗粒对沙粒有较好的抵抗作用,0.42mm的胶粉颗粒易剥落,加剧沙粒的磨损作用。

According to the characteristics of sandstorm environment in central and Western Inner Mongolia,the erosion simulation system of wind-blow sand environment was utilized to study the erosion wear behavior of rubber mortar of different rubber particle size and content in sandy environment.An L16（54）Taguchi orthogonal array was adopted to design the experiment,and SEM was used to observe the micro morphology of rubber mortar after erosion.The Taguchi results show that the minimum rubber mortar erosion rate is obtained under the condition of erosion velocity of 17 m/s,rubber particle size of 1.70 mm,rubber content of 5%,impact angle of 45°and abrasive feed rate of 45 g/min.The abrasive feed rate and erosion velocity are significant factors influencing erosion performance of rubber mortar.Under the same erosion conditions,the erosion rate of each size of the rubber mortar is as follows：1.70 mm rubber mortar〈cement mortar 〈0.18 mm rubber mortar 〈0.42 mm rubber mortar.Rubber mortar erosion is mainly sand on the surface of the cutting and squeezing action,of which 1.70 mm rubber grain has good resistance effects on the sand,0.42 mm powder particles is easy to spalling,which aggravate the wear of abrasive action.