Pavement concrete modifier and application thereof

The invention discloses a pavement concrete modifier and application thereof. The pavement concrete modifier is prepared from the following components in parts by mass: 5-7 parts of colloidal silicon dioxide with the solid content of 15-50%, 5-7 parts of a siloxane water repellent, 0.05-0.1 part of an active exciting agent, 0.5-1 part of a silane coupling agent and 30-40 parts of water. The modifier and the concrete form stable covalent bonds under the combined action of colloidal silicon dioxide, the siloxane water repellent, the active activator and the silane coupling agent, so that the pavement has the hydrophobic property and is prevented from being corroded and damaged by pollution such as rainwater. Meanwhile, fine particles of colloidal silicon dioxide can physically fill micro spaces among cement particles, and the filling compactness is improved, so that the early strength and durability of the concrete are improved, and the wear resistance and skid resistance of the road concrete are improved. 本发明公