矿物掺合料对混凝土抗酸雨侵蚀特性的影响
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Effect of Mineral Admixtures on Deterioration of Concreteunder Acid Rain Attack
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    摘要:

    通过室内加速腐蚀试验,用球压痕和超声波方法研究了含不同矿物掺合料(高钙粉煤灰、磨细高炉矿渣、硅粉)混凝土在模拟酸雨(pH=2)下的损伤劣化过程及特点.结果表明:在混凝土中掺入一定量、适宜的矿物掺合料,因其发生火山灰反应而使体系Ca(OH)2含量降低、微结构更加致密,在一定程度上延缓了酸雨对混凝土的侵蚀破坏进程,提高了混凝土的耐酸雨侵蚀能力,其中尤以高钙粉煤灰、磨细高炉矿渣和硅粉三元复掺效果最为明显,但总体上延缓作用有限,含矿物掺合料混凝土在酸雨侵蚀持续作用下仍会遭到严重侵蚀破坏.含矿物掺合料混凝土酸雨侵蚀破坏主要是H+溶蚀性破坏和SO2-4膨胀性破坏共同作用的结果.

    Abstract:

    Through accelerated corrosion tests, the damage processes of the concretes containing different mineral admixtures(high calcium fly ash(HFA), ground granulated blast furnace slag(GGBFS) and silica fume(SF)) in simulated acid rain solutions(pH=2) were investigated by sphere indentation and ultrasonoscope methods. The results show that the addition of suitable mineral admixtures can retard the damage process of concretes caused by acid rain and improve its resistance to some extent, especially for those with HFA, GGBFS and SF added together. The improvement results from the pozzolanic effect of mineral admixtures to reduce the content of Ca(OH)2 in concretes and make their microstructure more density. However, the function is finite as a whole and the concretes containing mineral admixtures can still suffer severe damage under the sustaining action of acid rain attack. The deterioration of the concretes containing mineral admixtures in acid rain solutions is caused by the dissolving erosion of H+ and the expanding erosion of SO4 2- together.

    参考文献
    [1]侯青,赵艳霞.2007年中国区域性酸雨的若干特征[J].气候变化研究进展,2009,5(1):7 11.
    HOU Qing,ZHAO Yan xia.An analysis on characteristics of regional acid rain over China in 2007[J].Advances in Climate Change Research,2009,5(1):7 11.(in Chinese)
    [2]张英姿,范颖芳,刘江林,等.模拟酸雨环境下C40混凝土抗压性能试验研究[J].建筑材料学报,2010,13(1):105 110.
    ZHANG Ying zi,FAN Ying fang,LIU Jiang lin,et al.Experimental study on compressive performance of concrete C40 in simulated acid environment[J].Journal of Building Materials, 2010,13(1):105 110.(in Chinese)
    [3]SERSALE R,FRIGIONE G.Acid deposition and concrete attack:Main influences[J].Cement and Concrete Research,1998,28(1):19 24.
    [4]HILL J,BYARS E A,SHARP J H.An experimental study of combined acid and sulfate attack of concrete[J].Cement and Concrete Composites,2003,25(9):997 1003.
    [5]BELIE D N,VERSELDER H J,BLAERE D B,et al.Influence of cement type on the resistance of concrete to feed acids[J].Cement and Concrete Research,1996,26(11):1717 1725.
    [6]王凯,马保国,龙世宗,等.不同品种水泥混凝土的抗酸雨侵蚀性能[J].武汉理工大学学报,2009,31(2):1 4.
    WANG Kai,MA Bao guo,LONG Shi zong,et al.Acid rain attack on different variety of cement concretes[J].Journal of Wuhan University of Technology,2009,31(2):1 4.(in Chinese)
    [7]SARIEIEN H,SHAMEEM M,BARRY M S,et al.Durability of proprietary cementitious materials for use in waste water transport systems[J].Cement and Concrete Composites,2003,25(4 5):421 427.
    [8]肖佳,周士琼.酸雨条件下低钙粉煤灰对水泥砂浆强度的影响[J].建筑材料学报,2005,8(4):440 445.
    XIAO Jia,ZHOU Shi qiong.Effect of low calcium fly ash on cement mortar strength in acid rain condition[J].Journal of Building Materials,2005,8(4):440 445.(in Chinese)
    [9]陈寒斌,陈剑雄,肖斐.掺复合矿物超细粉混凝土的耐久性研究[J].建筑材料学报,2006,9(3):353 356.
    CHEN Han bin,CHEN Jian xiong,XIAO Fei.Study on the durability of concrete modified by complex mineral superfine powder[J].Journal of Building Materials,2006,9(3):353 356.(in Chinese)
    [10]陈志城,包亦望.酸环境腐蚀对混凝土接触变形和损伤的影响[J].建筑材料学报,2001,4(3):244 249.
    CHEN Zhi cheng,BAO Yi wang.Influence of environmental corrosion on contact deformation and damage of concrete materials[J].Journal of Building Materials,2001,4(3):244 249.(in Chinese)
    [11]税国双,汪越胜,曲建民.材料力学性退化的超声无损检测与评价[J].力学进展,2005,35(1):52 68.
    SHUI Guo shuang,WANG Yue sheng,QU Jian min.Advances in nondestructive test and evaluation of material degradation using nonlinear ultrasound[J].Advances in Mechanics,2005,35(1):52 68.(in Chinese)
    [12]王凯,马保国,龙世宗.酸雨侵蚀下水泥石物相组成变化的微观分析[J].硅酸盐学报,2009,37(5):880 884.
    WANG Kai,MA Bao guo,LONG Shi zong.Microanalysis of phase compositions change of hardened cement paste to acid rain attack[J].Journal of the Chinese Ceramic Society,2009,37(5):880 884.(in Chinese)
    [13]余红发,孙伟,鄢良慧,等.在盐湖环境中高强与高性能混凝土的抗冻性[J].硅酸盐学报,2004,32(7):842 848.
    YU Hong fa,SUN Wei,YAN Liang hui,et al.Freezing thawing durability of high strength and high performance concrete exposed to salt lakes[J].Journal of the Chinese Ceramic Society,2004,32(7):842 848.(in Chinese)
    [14]SHI Cai jun,STEGEMANN J A.Acid corrosion resistance of different cementing materials[J].Cement and Concrete Research,2000,30(2):803 808.
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王凯,马保国,张泓源.矿物掺合料对混凝土抗酸雨侵蚀特性的影响[J].建筑材料学报,2013,(3):416-421

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  • 在线发布日期: 2013-07-15
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