.Thank you,prof. .My nameis .Imfrom .I amvery pleased to be here to join this forum.The topicof my presentation is properties of rapid construction materials for soil pavement of field airfield. As is shown in the picture, the main parts of my research are about soil pavement.My presentation will include these four parts:First, some background information about this research; second, the main work we have done; third, some conclusions we have got and the last: innovation