【摘要】：設(shè)計了8種干濕循環(huán)侵蝕制度,定量分析了不同侵蝕制度同混凝土中氯離子傳輸深度、氯離子含量分布規(guī)律、表面氯離子含量、氯離子擴(kuò)散系數(shù)、對流區(qū)及氯離子傳輸效率之間的關(guān)系.結(jié)果表明:干濕循環(huán)加速氯離子的傳輸僅限于一定范圍;不同干濕制度下,表面氯離子含量隨干濕比的增加而有所增加;干濕循環(huán)下混凝土中對流區(qū)的出現(xiàn)具有時間性;隨著干濕循環(huán)周期的增加,對流峰值以冪函數(shù)增加,且干濕比越大越有利于氯離子峰值濃度的積累;干濕循環(huán)制度不同,但干濕循環(huán)1個周期的時間相同且干濕比為5:1時,氯離子向混凝土內(nèi)的傳輸效率最高.
[Abstract]:Eight kinds of dry-wet cyclic erosion systems were designed, and the chloride transport depth, chloride content distribution, surface chlorine ion content, chloride diffusion coefficient of concrete with different erosion systems were quantitatively analyzed. The relationship between the convection region and the transport efficiency of chloride ions. The results show that the accelerated chlorine ion transport is limited to a certain range, the surface chlorine ion content increases with the increase of dry-wet ratio under different dry-wet systems, and the emergence of convective zone in the concrete under dry and wet cycles is time-dependent. With the increase of cycle period, the peak value of convection increases by power function, and the larger the ratio of dry and wet is, the more the accumulation of the peak concentration of chloride is. The dry and wet cycle systems are different, but when the dry and wet cycle time is the same and the dry-wet ratio is 5:1, the transport efficiency of chloride ions into concrete is the highest.
【作者單位】： 三峽大學(xué)土木與建筑學(xué)院;三峽地區(qū)地質(zhì)災(zāi)害與生態(tài)環(huán)境湖北省協(xié)同創(chuàng)新中心;
【基金】：國家自然科學(xué)基金資助項目(51109121,51379111) 湖北省自然科學(xué)基金資助項目(2012FFB03803) 中國水利水電科學(xué)研究院開放基金資助項目(IWHRKF201009)
【分類號】：TU528

【參考文獻(xiàn)】

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