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Water-based polyurethane polymer mortar for bridge deck repair and preparation method thereof

A water-based polyurethane and polymer technology, applied in the field of building materials, can solve problems such as waste of manpower and financial resources, achieve the effect of improving crack resistance, reducing crack resistance, solving joint damage and bridge deck wear

Active Publication Date: 2017-07-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

resulting in a waste of human and financial resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Medium sand, fly ash, silica fume, high-efficiency concrete superplasticizer with β-naphthalenesulfonic acid formaldehyde condensate as the main component, water-based polyurethane with a solid content of 35%, and γ-aminopropyl triethoxy as the main component The weight proportions of the main components of silane coupling agent and water are: 74.3%, 14.8%, 3%, 0.22%, 5.6%, 0.08%, 2.0%. At room temperature, first add the dry aggregate and filler into the mixer, and stir for 2 minutes. Then add the water-based polyurethane and continue stirring for 1 min until all the aggregates are completely wetted by the polymer. Then add the silane coupling agent and stir for 1 min. Finally, add naphthalene-based high-efficiency water reducer and stir the polymer mortar evenly. The repaired area can be paved with the mixed mortar.

Embodiment 2

[0025] Medium sand, fly ash, silica fume, high-efficiency concrete superplasticizer with β-naphthalenesulfonic acid formaldehyde condensate as the main component, water-based polyurethane with a solid content of 35%, and γ-aminopropyl triethoxy as the main component The weight proportions of the main components of silane coupling agent and water are: 70.4%, 15.9%, 3.6%, 0.20%, 8.2%, 0.1%, 1.6%. At room temperature, first add the dry aggregate and filler into the mixer, and stir for 2 minutes. Then add the water-based polyurethane and continue stirring for 1 min until all the aggregates are completely wetted by the polymer. Then add the silane coupling agent and stir for 1 min. Finally, add naphthalene-based high-efficiency water reducer and stir the polymer mortar evenly. The repaired area can be paved with the mixed mortar.

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PUM

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Abstract

The invention provides a bridge deck repair waterborne polyurethane polymer mortar and a preparation method thereof. The bridge deck repair waterborne polyurethane polymer mortar comprises, in weight percent, 70.4%-74.3% of medium sands, 14.8%-15.9% of coal ash, 3%-3.6% of silicon ash, 0.2%-0.22% of naphthalene water reducers, 5.6%-8.2% of waterborne polyurethane, 0.08%-0.1% of silane coupling agents and 1.6%-2.0% of water. At normal temperature, dry aggregates including the medium sands, the coal ash and the silicon ash are firstly added into a stirrer and stirred for 2min, the waterborne polyurethane is added, stirring is continued for 1min until all the aggregates are completely wetted by the waterborne polyurethane, the silane coupling agents are added and stirred for 1min, the naphthalene water reducers are finally added, and the polymer mortar is uniformly stirred. The mortar with the waterborne polyurethane can repair bridge deck cracks and solve the problems of joint damage, bridge deck abrasion and the like, durability of a bridge structure is improved, and fine working performance of a bridge is kept.

Description

technical field [0001] The invention relates to a building material, in particular to a water-based polyurethane polymer mortar capable of repairing bridge decks. The invention also relates to a preparation method of water-based polyurethane polymer mortar capable of bridge deck repair. 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 bridge structure. However, due to the complex environment of the bridge, which has been eroded by seawater and chloride ions of deicing salt for a long time, problems such as cracks, joint damage and bridge deck wear will inevitably occur on the bridge deck. In the past, people repaired the damaged bridge deck by pouring asphalt into the cracks of the bridge deck to seal the cracks, or adding a layer of ordinary cement mortar. This is only an emergency measure and cannot fundamentally solve the problem of repairing the concre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/16C04B18/08C04B18/14
CPCY02W30/91
Inventor 刘宗民徐晓沐赵昆璞毛继泽王杜辰王恺源
Owner HARBIN ENG UNIV