土木工程橋梁外文文獻(xiàn)翻譯中英文-在線瀏覽
2025-02-08 07:48本頁面
【正文】 n of the reinforcing steel is caused by corrosion and can be prevented by actions taken at the time of construction and for a period after construction . Preventative techniques that can be applied at construction include the use of epoxy coated mild steel , stainless steel of carbon or glass fibre reinforcement , inhibitors , cathodic protection , anticarbonation coatings , silane treatments and waterproofing membranes . All of these techniques , except the last three , directly protect the reinforcement against corrosion and to date , have been used only occasionally largely on grounds of cost . Waterproofing membranes , silane treatments , and anticarbonation coatings are applied to the concrete and are designed to slow down the ingress of carbon dioxide and chlorides into the concrete thereby increasing the age of the structure when the reinforcement begins to corrode . These techniques can be used after construction because they are applied to the concrete surface and they should be effective , providing corrosion of the reinforcement has not already begun . It is important not to overlook the importance of well pacted and cured, low water : cement ratio concrete in preventing reinforcement corrosion. When corrosion of the reinforcement occurs it result in a loss of steel section and/or cracking, spalling and delamination of concrete due to the stresses produced as a result of the low density of rust pared with density of the steel . Reinforcement corrosion repair methods have two main functions , to crete replacement 。 desalination 。 this process takes about 6 weeks . Realkalization stops corrosion caused by carbonation and it works by migrating s
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