Construction reserved steel bar antirust coating and construction method

A technology of anti-rust coatings and reserved steel bars, which is applied in the direction of anti-corrosion coatings, cement coatings, coatings, etc., can solve the problems affecting the force of reinforced concrete structures, the reduction of the binding force between concrete and steel bars, and reduce construction costs. Corroded steel bars, easy to paint effect

Inactive Publication Date: 2021-03-23
上海泾东建筑发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former can only be used for short-term temporary rust prevention of steel bars; the latter is likely to cause gaps between concrete and steel bars when pouring concrete, and the grip force between concrete and steel bars is greatly reduced, affecting the force of reinforced concrete structures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An antirust coating for steel bars reserved for construction, the antirust coating is composed of the following raw materials in terms of weight percentage: 80-120 parts of cement, 20-30 parts of polyacrylate emulsion, 0.5-0.9 parts of naphthalene-based water reducer, 0.05-0.2 parts of defoamer and 25-50 parts of water.

[0026] In this embodiment, in order to better use the anti-rust coating: the anti-rust coating is composed of the following raw materials by weight percentage: 90 parts of cement, 20 parts of polyacrylate emulsion, 0.6 parts of naphthalene-based water reducer, disinfectant 0.15 parts of foaming agent and 35 parts of water.

[0027] In this embodiment, in order to better use the anti-rust coating: the anti-rust coating is composed of the following raw materials by weight percentage: 110 parts of cement, 26 parts of polyacrylate emulsion, 0.8 parts of naphthalene-based water reducer, disinfectant 0.16 parts of foaming agent and 45 parts of water.

[00...

Embodiment 2

[0034] A kind of construction method of antirust coating for steel reinforcement reserved for construction, it comprises the following steps:

[0035] Step 1: Prepare various raw materials for preparing antirust coatings, wherein the various raw materials are calculated by weight percentage, and are composed of the following raw materials: 90 parts of cement, 20 parts of polyacrylate emulsion, 0.6 parts of naphthalene-based water reducer, and 0.15 parts of defoaming agent 35 parts and 35 parts of water, mixing equipment for preparing anti-rust paint and brushing tools for steel bars;

[0036] Step 2: After weighing each raw material, first mix and stir cement, 50% water, and naphthalene-based water reducer, then add 50% water, polyacrylate emulsion, and defoamer, and continue stirring until soft and uniform state, so as to obtain anti-rust coatings;

[0037] Step 3: Treat the surface of the steel bar to be painted so that there is no dust and other impurities on the surface; ...

Embodiment 3

[0040] A kind of construction method of antirust coating for steel reinforcement reserved for construction, it comprises the following steps:

[0041] Step 1: Prepare various raw materials for the preparation of antirust coatings, wherein the various raw materials are calculated by weight percentage, and are composed of the following raw materials: 110 parts of cement, 26 parts of polyacrylate emulsion, 0.8 parts of naphthalene-based water reducer, and 0.16 parts of defoaming agent 45 parts and 45 parts of water, mixing equipment for preparing anti-rust paint and steel bar painting tools;

[0042] Step 2: After weighing each raw material, first mix and stir cement, 50% water, and naphthalene-based water reducer, then add 50% water, polyacrylate emulsion, and defoamer, and continue stirring until soft and uniform state, so as to obtain anti-rust coatings;

[0043] Step 3: Treat the surface of the steel bar to be painted so that there is no dust and other impurities on the surf...

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PUM

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Abstract

The invention discloses a construction reserved steel bar antirust coating and a construction method. The formula of the construction reserved steel bar antirust coating polyacrylate cement-based antirust coating comprises the following components in parts by weight: 80-120 parts of cement, 20-30 parts of polyacrylate emulsion, 0.5-0.9 part of naphthalene water reducer, 0.05-0.2 part of defoamingagent and 25-50 parts of water. The construction reserved steel bar antirust coating is easy to brush and construct on site, the polyacrylate cement-based antirust coating can cover the surface of a reserved steel bar, a coating layer on the surface of the steel bar does not crack for a long time, and the reserved steel bar is protected against rust spots in the outdoor natural environment for oneyear; and the bond stress between the concrete and the steel bar coated with the antirust coating is not reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an antirust coating for steel bars reserved for construction and a construction method. Background technique [0002] Due to the complex structure of the construction project, there are often concrete post-pouring belts during the construction process. The time interval for concrete pouring at the post-casting belt is long, and the steel bars reserved for construction are exposed for a long time. The corrosion of the steel bars is serious. The durability of reinforced concrete at the pouring belt part, yellow-brown rust seeps into the surface of the concrete, causing color difference on the surface of the concrete and affecting the appearance quality of the concrete. At present, the conventional practice at the construction site is: brushing cement slurry and spraying antirust agent. The former can only be used for short-term temporary rust prevention of steel bars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/08C09D133/04C09D5/08B05D7/24B05D7/14B05D5/00
CPCB05D5/00B05D7/14B05D7/24B05D2502/00C09D1/08C09D5/08C09D133/04
Inventor 张晗风聂文高杨莹
Owner 上海泾东建筑发展有限公司
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