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Bridge deck slab waterborne polyurethane polymer concrete and preparation method thereof

A water-based polyurethane and polymer technology, which is applied in the field of water-based polyurethane polymer concrete and water-based polyurethane polymer concrete preparation, can solve problems such as corrosion and damage of bridge decks, and achieve the effects of reducing the self-weight of the structure, enhancing the cohesion and durability.

Active Publication Date: 2015-09-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a bridge deck water-based polyurethane polymer concrete that can effectively solve the problem that the bridge deck is easily damaged by corrosion in a complex environment, and greatly reduce the repair cost in the operation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Coarse aggregate with a maximum particle size of no more than 20 mm, medium sand, fly ash, silica fume, and a high-efficiency concrete water reducer mainly composed of β-naphthalenesulfonic acid formaldehyde condensate, with a solid content of 35% The water-based polyurethane and the silane coupling agent mainly composed of γ-aminopropyltriethoxy, these raw materials are as follows according to weight ratio: 43.1%, 30.1%, 13.8%, 3.4%, 0.2%, 9.3% %, 0.1%. At room temperature, put the dry aggregate and filler into the forced mixer and stir for 2 minutes. Then add the aqueous polyurethane emulsion and stir for another 3 minutes. Then add the silane coupling agent and stir for 1 min. Finally, add naphthalene-based high-efficiency water reducer and stir for 2 minutes to make the mixture reach a uniform state, and the construction can be carried out.

Embodiment 2

[0023] Example 2: Coarse aggregate with a maximum particle size of no more than 20 mm, medium sand, fly ash, silica fume, and a concrete high-efficiency water reducer mainly composed of β-naphthalenesulfonic acid formaldehyde condensate, with a solid content of 35% The water-based polyurethane and the silane coupling agent mainly composed of γ-aminopropyltriethoxy, these raw materials are in order of weight: 47.4%, 28.9%, 12.9%, 3.0%, 0.25%, 7.4% %, 0.15%. At room temperature, put the dry aggregate and filler into the forced mixer and stir for 2 minutes. Then add the aqueous polyurethane emulsion and stir for another 3 minutes. Then add the silane coupling agent and stir for 1 min. Finally, add naphthalene-based high-efficiency water reducer and stir for 2 minutes to make the mixture reach a uniform state, and the construction can be carried out.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/16C04B14/06C04B18/08C04B24/42C04B14/02
CPCY02W30/91
Inventor 刘宗民赵昆璞毛继泽徐晓沐王杜辰王恺源
Owner HARBIN ENG UNIV
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