風(fēng)積沙混凝土鹽凍損傷規(guī)律與機(jī)理分析
發(fā)布時間:2019-02-22 06:46
【摘要】:利用加速試驗方法研究了風(fēng)積沙混凝土在腐蝕與凍融雙因素作用條件下的損傷規(guī)律,并借助氣泡間距分析儀(analyzer of air void spacing,AVS)、環(huán)境電鏡掃描(environmental scanning electron microscope,ESEM)和核磁共振(nuclear magnetic resonance,NMR)微觀測試手段得到了風(fēng)積沙混凝土的損傷失效機(jī)理。結(jié)果表明,在鹽腐蝕與凍融循環(huán)雙因素作用下,風(fēng)積沙混凝土的損傷程度依次為復(fù)合鹽硫酸鹽氯鹽,但在3種鹽溶液中凍融的損傷機(jī)理不同;在鹽溶液中,風(fēng)積沙摻量越大,抗凍性能越好。該研究為風(fēng)積沙混凝土在低溫鹽腐蝕的環(huán)境中大范圍推廣使用提供理論依據(jù)。
[Abstract]:The damage law of eolian sand concrete under the action of corrosion and freeze-thaw was studied by means of accelerated test method. With the help of bubble spacing analyzer (analyzer of air void spacing,AVS), scanning (environmental scanning electron microscope, of environmental electron microscope was used. The damage failure mechanism of eolian sand concrete was obtained by means of ESEM and NMR (nuclear magnetic resonance,NMR. The results show that under the action of salt corrosion and freeze-thaw cycle, the damage degree of eolian sand concrete is compound salt sulfate chloride, but the damage mechanism of freeze-thaw is different in three kinds of salt solution. In salt solution, the larger the amount of eolian sand is, the better the frost resistance is. This study provides a theoretical basis for the wide application of eolian sand concrete in low temperature salt corrosion environment.
【作者單位】: 內(nèi)蒙古農(nóng)業(yè)大學(xué)水利與土木建筑工程學(xué)院;內(nèi)蒙古建筑職業(yè)技術(shù)學(xué)院建筑工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(51569021,51769025)
【分類號】:TV431
本文編號:2427927
[Abstract]:The damage law of eolian sand concrete under the action of corrosion and freeze-thaw was studied by means of accelerated test method. With the help of bubble spacing analyzer (analyzer of air void spacing,AVS), scanning (environmental scanning electron microscope, of environmental electron microscope was used. The damage failure mechanism of eolian sand concrete was obtained by means of ESEM and NMR (nuclear magnetic resonance,NMR. The results show that under the action of salt corrosion and freeze-thaw cycle, the damage degree of eolian sand concrete is compound salt sulfate chloride, but the damage mechanism of freeze-thaw is different in three kinds of salt solution. In salt solution, the larger the amount of eolian sand is, the better the frost resistance is. This study provides a theoretical basis for the wide application of eolian sand concrete in low temperature salt corrosion environment.
【作者單位】: 內(nèi)蒙古農(nóng)業(yè)大學(xué)水利與土木建筑工程學(xué)院;內(nèi)蒙古建筑職業(yè)技術(shù)學(xué)院建筑工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(51569021,51769025)
【分類號】:TV431
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