Multi-scale fiber reinforced cement stable gravel roadbase material

Abstract

The invention provides a multi-scale fiber reinforced cement stable gravel roadbase material doped with different-length fiber, such as micro-steel fiber and the like. The invention provides a methodwhich can better improve the performance of cement stable gravel roadbase material than flexible fiber and effectively improve the shrinkage crack resistance capability and mechanical property of theroadbase material. The multi-scale fiber reinforced cement stable gravel roadbase material of the invention comprises cement stable gravel and multi-scale fiber material, wherein, the multi-scale fiber material comprises micro-steel fiber and glass fiber, and the doping amount of the micro-steel fiber and the glass fiber is respectively 0.8-1.2kg / m<3>. The invention adopts multi-scale short fiber,has favorable mixture workability and even fiber dispersion and is easy to satisfy construction requirements; low fiber doping amount effectively lowers material cost; in the process of base materialcrack expansion, addition of short cut glass fiber causes to form a plurality of micro cracks, which further effectively improves impact resistance of the base material and increases crack energy.

Description

technical field [0001] The invention relates to the technical field of construction materials, in particular to a cement-stabilized gravel pavement base material. Background technique [0002] Cement-stabilized macadam semi-rigid base material has the advantages of high bearing capacity, high rigidity, good integrity, good water stability and good anti-traffic fatigue performance, and is currently the main form of pavement structure for high-grade highways in my country. However, due to the high brittleness and low deformation resistance of cement-stabilized macadam semi-rigid base materials, shrinkage cracks are prone to occur under the condition of temperature and humidity changes, and are reflected to the asphalt surface layer to form "reflective cracks", leading to premature failure of the pavement , affect the performance of the pavement and shorten the service life of the road. With the extensive use of semi-rigid base asphalt pavement, the problem of cracks has becom...

AI Technical Summary

Problems solved by technology

In terms of fiber reinforcement, the existing research only uses polypropylene fibers, for example: shrinkage performance of polypropylene fiber cement stabilized gravel [No. Does not consider the use of multi-scale fiber reinforcement