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Magnesium oxychloride coating reinforced concrete and preparation method thereof

A technology of reinforced concrete and magnesium oxychloride, which is applied in the direction of manufacturing tools, auxiliary molding equipment, ceramic molding machines, etc., can solve problems such as time-consuming, labor-intensive, energy-consuming, and complex processes, so as to promote the scope of application, reduce construction costs, and improve durability. corrosive effect

Inactive Publication Date: 2017-11-07
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to solve the corrosion of steel bars by magnesium oxychloride cement concrete, a rust inhibitor is added to magnesium oxychloride cement concrete to alleviate the corrosion of steel bars, but the effect is not ideal, and the corrosion of steel bars cannot be avoided
Coatings are also used to prevent the corrosion of steel bars by chloride salts, but due to the complex process, energy consumption, time-consuming and labor-intensive preparation of coated steel bars, and the effective life of the coating is too short, it cannot reach the service life specified in the design

Method used

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  • Magnesium oxychloride coating reinforced concrete and preparation method thereof
  • Magnesium oxychloride coating reinforced concrete and preparation method thereof
  • Magnesium oxychloride coating reinforced concrete and preparation method thereof

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preparation example Construction

[0041] The preparation method of the magnesium oxychloride coating reinforced concrete that the present invention relates to may further comprise the steps:

[0042] Step 1: Remove oil, rust and other impurities on the surface of the steel bar to ensure that the surface of the steel bar is dry and clean without foreign matter;

[0043] Step 2: Bind the reinforcement cage according to the design requirements, and hoist the reinforcement cage in the coating coating room after binding;

[0044] Step 3: At room temperature, evenly coat the surface of the steel bar with a modified epoxy resin coating;

[0045] The modified epoxy resin coating material is obtained by adding diluent and curing agent to the modified epoxy resin; the modified epoxy resin is MASTERSEAL SP120 PF, the diluent and curing agent are the corresponding MASTERSEAL SP120 PF series, the diluent The dosage is 5%-20% of the modified epoxy resin, and the dosage of the curing agent is 5%-10% of the modified epoxy re...

Embodiment

[0068] Use alkali washing to remove oil stains on the surface of the steel bar, and use sandpaper to remove rust on the surface of the steel bar. Ensure that the surface of the steel bar is dry, clean and free of foreign matter;

[0069] After the reinforcement cage is bound according to the design requirements, hoist the reinforcement cage in the coating coating room;

[0070] At room temperature, add diluent and curing agent to the modified epoxy resin coating, and then use a brush or a small roller to carefully and evenly coat the reinforcement cage;

[0071]Allow it to dry for 24 hours after the first coat, and then apply the second coat. The cured coating is light gray and the thickness is between 0.18mm and 0.3mm. After curing, the coating should be continuous without visible defects such as holes, cracks and voids;

[0072] Support the template and apply the release agent, then hoist the coated steel cage into the template, then check whether the position of the reinf...

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Abstract

The invention relates to a magnesium oxychloride coating reinforced concrete and a preparation method thereof. The magnesium oxychloride coating reinforced concrete and the preparation method thereof comprises the following steps that impurities on the surface of a steel bar are removed, a steel bar cage is lashed, the surface of the steel bar is uniformly coated with modified epoxy resin coating at the room temperature; second coating is conducted after 24 h, the cured coating is light gray, the thickness is between 0.18 mm-0.3 mm, the coated steel bar is hoisted into the formwork coated with release agent, and magnesium oxychloride cement concrete is prepared by utilizing flying ash, magnesium chloride, magnesium oxide, water-reducing agent, phosphoric acid, gravel, sand and water; formwork pouring and vibrating are conducted on the prepared magnesium oxychloride cement concrete, the pouring and inclined falling height of the magnesium oxychloride cement concrete is not larger than 1m, the formwork is disassembled after maintaining for 72 h. According to the magnesium oxychloride coating reinforced concrete and the preparation method thereof, on the basis of fully utilizing the advantages such as non-combustiblity, quick hardening, high-strength and bittern-resistance of the magnesium oxychloride cement concrete, the problem of corrosion to steel bar is solved, and the application range of the magnesium oxychloride reinforced concrete is promoted.

Description

technical field [0001] The invention relates to the anticorrosion technology of reinforced concrete, in particular to a magnesium oxychloride-coated reinforced concrete and a preparation method thereof. Background technique [0002] Magnesium oxychloride cement concrete is widely used in non-load-bearing components such as interior partition panels, decorative panels, ceilings, and floor materials in buildings. Due to its low corrosion resistance to steel bars, it cannot be used in load-bearing structures, so its application range is greatly limited. However, magnesium oxychloride cement concrete has the advantages of non-combustibility and temperature resistance, air hardness and stability in dry air, rapid hardening, high strength and good bittern resistance. Among them, it has good bittern resistance without modification, which determines its application prospect in saline soil and salt lake areas. Therefore, if the shortcomings of magnesium oxychloride cement concrete ...

Claims

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Application Information

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IPC IPC(8): B28B23/02B28B1/087B28B17/00C04B28/32
CPCB28B23/02B28B1/087B28B17/00C04B28/32C04B18/08C04B2103/302C04B22/165C04B14/02C04B14/06
Inventor 高升高志宏张海张雄雄李谈王家乐雷永生王立新王俊毛念华呼喜锋
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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