The invention discloses a thick-layer spreading cold mixing large gap emulsified
asphalt mixture and a design method thereof, and belongs to the technical field of a modern pavement. Based on a mineral aggregate main aggregate
void volume filling method, use amount of mineral powders, thick and fine aggregates and mineral powders is calculated, optimal liquid use amount is preliminarily determined through wrapping and covering tests and mixing tests, and optimal
asphalt amount, optimal emulsified
asphalt, and optimal adding water mixing amount are finally determined through a Marshall test. The target void content of the emulsified asphalt mixture is 7%-30%. Through the design method, the emulsified asphalt mixture used for a matrix layer of a semi-flexible pavement, and each layer of a drainage pavement and a
porous pavement can be manufactured. The cold mixing emulsified asphalt mixture and a large gap pavement are combined, and a paving effect of a hot mixing
asphalt pavement can be achieved. The emulsified asphalt mixture is energy saving and
environmentally friendly, and aging degree of the emulsified asphalt mixture in a construction is reduced.