Cured mud and sand material for building roadbeds and preparation method thereof

The invention belongs to a highway roadbed material, in particular relates to a highway roadbed material prepared from dredger sand and silt in coastal regions and a small amount of curing agent, and belongs to the technical field of highway building materials. The highway roadbed material comprises the following main components in percentage by weight: 35 to 75 percent of dredger sand, 15 to 55 percent of silt and 5 to 10 percent of curing agent, wherein the curing agent comprises the following components in percentage by weight: 90 to 95 percent of cement clinker, 3 to 6 percent of zeolite, 0.5 to 2 percent of polyacrylamide, 0.2 to 1 percent of polyving akohol, 0.2 to 1 percent of vinylite, 0.2 to 1 percent of acrylic ester and 0.2 to 1 percent of sodium carboxymethylcellulose. The new highway roadbed material for coastal regions meets the environmental protection requirement, and has low cost, high strength and good road performance. When 5 percent of curing agent is doped, the unconfined compressive stre