Bridge deck slab waterborne polyurethane polymer concrete and preparation method thereof

Abstract

The invention provides bridge deck slab waterborne polyurethane polymer concrete and a preparation method thereof. The bridge deck slab waterborne polyurethane polymer concrete comprises the following raw material components: coarse aggregate, medium sand, coal ash, silica dust, a naphthalene water reducer, waterborne polyurethane and a silane coupling agent. The preparation method of the bridge deck slab waterborne polyurethane polymer concrete comprises the following steps: at room temperature, putting dried coarse aggregate, medium sand, coal ash and silica dust into a stirrer; then, adding waterborne polyurethane emulsion and stirring; and then adding the silane coupling agent and stirring; and finally adding the naphthalene water reducer and stirring. According to the preparation method, the waterborne polyurethane polymer is used for replacing concrete to serve as a cementing material, is mixed with aggregate and is added with coal ash, silica dust, the naphthalene water reducer and the silane coupling agent. The bridge deck slab waterborne polyurethane polymer concrete can be applied to a bridge deck structure which has a high requirement on durability or is difficult to repair and large in span.

Description

technical field

[0001] The invention relates to a building material, in particular to a water-based polyurethane polymer concrete for a bridge deck. The invention also relates to a method for preparing water-based polyurethane polymer concrete for bridge decks. Background technique

[0002] The bridge deck is an important part of the bridge structure, and the durability of the bridge deck directly affects the durability of the whole bridge. At the same time, with the continuous increase of the span of the bridge, it is very necessary to reduce the self-weight of the structure. Therefore, the choice of bridge deck material is very important. Ordinary concrete bridge decks are often damaged by chloride ion attack, freezing and carbonization. Although these damages are initially superficial, over time they can extend to the inner structural material, causing reinforcement corrosion and threatening the life of the entire bridge. At the same time, the strength of ordinary con...