土木工程橋梁外文文獻(xiàn)翻譯中英文(更新版)
【正文】 pose of essential maintenance is to increase the load carrying capacity and the reason for the inadequate capacity is secondary . If the reason is simply increased loading the maintenance can be limited to increasing the capacity , but if the reason is deterioration then maintenance must also include repairs and preventative maintenance. The selection of the maintenance method for repairs prevention depends primarily on the cause of deterioration . For steel construction the main cause of deterioration is corrosion and regular maintenance painting should be carried out to prevent the steel from corroding . If corrosion does occur then the only repair option is to grit blast back to shiny metal before repainting . An assessment of load carrying capacity should be carried out if corrosion has resulted in a significant reduction of steel section . The selection of repair and prevention methods for concrete construction is more plex because there are numerous causes of concrete deterioration .The deterioration of reinforced concrete can be conveniently subdivided into deterioration of the concrete and deterioration of the steel reinforcement . The main causes of concrete deterioration are sulphates , freethaw cycles and alkalisilica reaction(ASR) . Deterioration can also be related to poor mix design and construction process such as paction and curing . These types of deterioration can only be prevented by actions taken at the time of construction 。元素替換可以用于甲板和橫梁，碼頭和圓柱。惡化的鋼 筋混凝土原因可以簡單地分為混凝土惡化和鋼筋惡化分歧兩種。堿硅酸水泥之間的聚合和堿反應(yīng)是可以預(yù)防避免 產(chǎn) 生聚合反應(yīng)類型 并可以 保持在指定的限制以下水泥堿含量。防水卷材，硅烷處理，防碳化涂層應(yīng)用到具體的，其目的是減緩到混凝土，從而增加了結(jié)構(gòu)加固時(shí)的年齡開始腐蝕的二氧化碳和氯化物進(jìn)入。陰極保護(hù)，可應(yīng)用在任何時(shí)候停止或氯化物腐蝕碳化引起的。
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