本文選題：溶蝕混凝土　切入點(diǎn)：溶蝕機(jī)理　出處：《浙江工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：通過試驗(yàn)主要研究了不同配合比混凝土力學(xué)性能隨溶蝕時(shí)間的演化規(guī)律。在試驗(yàn)過程中,將溶蝕深度、劈拉強(qiáng)度、抗壓強(qiáng)度、彈性模量和飽和面干吸水率作為溶蝕混凝土的評價(jià)指標(biāo),基于試驗(yàn)結(jié)果,分析了水灰比和骨料體積含量對溶蝕混凝土力學(xué)性能的影響。通過研究得到以下主要結(jié)論:(1)酚酞指示劑能很好地表征混凝土的溶蝕深度,溶蝕深度與溶蝕時(shí)間的平方根成正比。(2)混凝土的飽和面干吸水率隨著溶蝕時(shí)間不斷增加,對于給定的骨料體積含量和溶蝕時(shí)間,水灰比越大,飽和面干吸水率越大。(3)混凝土彈性模量、抗壓強(qiáng)度和劈拉強(qiáng)度均隨著溶蝕時(shí)間的增大而減小,水灰比和骨料體積率對它們的減小速率有較大影響,與彈性模量相比,劈拉強(qiáng)度對于溶蝕的影響更敏感。(4)溶蝕損傷系數(shù)與混凝土的彈性模量、抗壓強(qiáng)度和劈裂抗拉強(qiáng)度線性相關(guān)。介紹了溶蝕混凝土抗壓強(qiáng)度預(yù)測模型,通過與試驗(yàn)結(jié)果比較,驗(yàn)證了該模型的有效性。(5)采用壓汞法對不用溶蝕時(shí)間的水泥石進(jìn)行微觀分析,結(jié)果表明,隨著溶蝕的進(jìn)行,水泥石的密實(shí)度不斷降低,從而從微觀上解釋了混凝土性能的退化機(jī)理。介紹了溶蝕水泥石孔隙率模型,通過與試驗(yàn)結(jié)果比較,驗(yàn)證了該模型的有效性。
[Abstract]:The evolution law of mechanical properties of concrete with different mix ratio with corrosion time was studied. In the process of the test, the corrosion depth, splitting tensile strength, compressive strength were studied. The modulus of elasticity and the dry water absorption of saturated surface are used as evaluation indexes of corroded concrete, based on the test results, The effects of water / cement ratio and aggregate volume content on the mechanical properties of corroded concrete are analyzed. The following main conclusions are obtained: 1) phenolphthalein indicator can well characterize the corrosion depth of concrete. The dry water absorption of the saturated surface of concrete increases with the corrosion time, and the water / cement ratio increases for the given aggregate volume content and dissolution time. The larger the dry water absorption ratio of saturated surface is, the greater the elastic modulus, compressive strength and splitting tensile strength of concrete decrease with the increase of corrosion time. The ratio of water to cement and the volume ratio of aggregate have great influence on the decreasing rate of concrete, compared with the elastic modulus, the ratio of water to cement and the volume ratio of aggregate have great influence on the decreasing rate of concrete. The effect of splitting tensile strength on dissolution is more sensitive. 4) the corrosion damage coefficient is linearly related to the elastic modulus, compressive strength and splitting tensile strength of concrete. The prediction model of compressive strength of corroded concrete is introduced, and the results are compared with the experimental results. The validity of the model is verified. (5) the microcosmic analysis of cement stone without corrosion time is carried out by mercury injection method. The results show that the compactness of cement stone decreases with the corrosion. Therefore, the degradation mechanism of concrete performance is explained microscopically, and the porosity model of corroded cement stone is introduced. The validity of the model is verified by comparing with the experimental results.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU528

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉泰鈴;阮燕;吳艷華;;摻石灰石粉對混凝土抗軟水表面接觸溶蝕的影響[J];人民長江;2009年15期

2 李新宇;方坤河;;混凝土滲透溶蝕過程中鈣離子遷移過程數(shù)值模擬[J];長江科學(xué)院院報(bào);2008年06期

3 張研;張子明;宋智通;;混凝土化學(xué)-力學(xué)耦合作用的非局部損傷模型[J];固體力學(xué)學(xué)報(bào);2007年02期

4 張研;張子明;邵建富;;混凝土化學(xué)——力學(xué)損傷本構(gòu)模型[J];工程力學(xué);2006年09期

5 覃維祖;;混凝土技術(shù)進(jìn)展現(xiàn)狀與可持續(xù)發(fā)展前景[J];施工技術(shù);2006年04期

6 邢林生,聶廣明;混凝土壩壩體溶蝕病害及治理[J];水力發(fā)電;2003年11期

7 邢林生,聶廣明;我國水電站混凝土建筑物耐久性分析[J];水力發(fā)電;2003年02期

8 陳江茂;鋼筋混凝土在使用中與外部環(huán)境發(fā)生化學(xué)作用及其防護(hù)[J];韓山師范學(xué)院學(xué)報(bào);2002年02期

9 楊德福,馬鋒玲;面板混凝土抗裂及耐久性研究[J];水力發(fā)電;2001年08期

10 李金玉,曹建國,林莉,田軍濤,王愛勤,彭小平;水工混凝土耐久性研究的新進(jìn)展[J];水力發(fā)電;2001年04期

相關(guān)碩士學(xué)位論文 前1條

1 張亮;電化學(xué)加速混凝土溶蝕試驗(yàn)研究[D];河海大學(xué);2007年

，

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