Research on the Application of Recycled Powder Composite Mortar in Filling Crushed Stone Base
Aiming at the problems of large yield,low utilization rate and difficult treatment of recovered powder,the technical index of recovered powder,the working condition of recovered powder composite mortar and the road performance of injected large gravel base were studied by using indoor test and field test road section construction.The results show that the particle size of recovered powder is mainly distributed in the range of 0.049～0.075mm,which has the characteristics and morphology of clay.The work-ability and mechanical properties of recycled powder composite mortar decrease with the increase of recycled powder content.When the recovered powder content is 40%,the composite mortar can completely permeate in the large gravel base without flowing,and the unconfined compressive strength of the reclaimed powder composite mortar injected with large gravel specimen is 3.1MPa,and the project cost of this new material can be reduced by 10% compared with the cement stabilized gravel material.
万方数据
维普
