Suppressing rebar corrosion in historical buildings and structures with poor environmental conditions through RC repair.
This method enhances the rust prevention effect of existing cross-section repair methods by applying ERP rebar rust preventive agent after the rust prevention treatment of rebar corrosion repair methods. The ERP rebar rust preventive agent forms a moisture and chloride penetration suppression layer by being impregnated into the polymer cement-based rust preventive material applied to the rebar. This suppression layer inhibits the intrusion of deterioration factors and improves the rust prevention effect, making it effective for historical buildings with insufficient cover thickness and for the repair of RC structures. This method was developed based on the experience gained from the repair work of the old Shime vertical shaft tower, for which our company was responsible for the structural work, and is suitable for the repair of cultural properties and historical buildings where changes to the external shape are difficult.
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basic information
【Improved Rust Prevention Effect】 Reinforced concrete treated with ERP rebar rust inhibitor suppresses corrosion caused by rainwater and chlorides. 【Suppressing Rebar Corrosion in Historical Buildings and Structures with Deterioration Concerns】 The rust prevention effect of the ERP rebar rust inhibitor is achieved at the surface of the applied polymer cement-based rust prevention material, allowing for the suppression of rebar corrosion in historical buildings with insufficient cover thickness and in existing structures where environmental conditions raise concerns about deterioration after repair. 【Performance as a Rebar Rust Prevention Material】 It meets the standard values set forth in the Building Renovation Work Supervision Guidelines (2022 Edition) and the NEXCO Structural Construction Management Guidelines. 【Effect of Suppressing Chloride Infiltration】 By applying the ERP rebar rust inhibitor to polymer cement-based rust prevention materials, the depth of chloride infiltration and the amount of chlorides can be significantly reduced.
Price information
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Delivery Time
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Applications/Examples of results
This method is effective for the repair of reinforced concrete in cultural properties and historical buildings, as it can demonstrate a high rust prevention effect solely with the rust prevention treatment layer on the surface of the rebar when there is insufficient cover thickness.
Detailed information
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The situation of applying "polymer cement-based rust prevention material + ERP rebar rust prevention agent" to the rebar.
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Promoted deterioration of rebar: ERP rebar rust inhibitor available.
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Promoted deterioration of rebar: ERP rebar rust inhibitor available.
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To verify performance, mortar test specimens were created, and the cross-sections after the salt penetration test with and without ERP coating were analyzed using EPMA.
Company information
Our company has consistently engaged in the investigation and diagnosis of reinforced concrete buildings, as well as renovation work, and from seismic diagnosis to seismic reinforcement work for many years. In recent years, we have been working as a specialized company focused on various issues such as the maintenance and preservation of various buildings and structures, improving seismic performance, environmental measures, energy conservation, and resource conservation. We will continue to respond swiftly to the diversified needs related to the safety and security of society and contribute to the creation of a "happy environment" in society.
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