锂渣混凝土孔分形维数与气体渗透性能关系研究
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摘要
利用压汞法(MIP)测试了不同锂渣掺量的C30、C60混凝土的孔结构参数,计算了被测混凝土的孔体积分形维数、孔轴线分形维数,并研究了混凝土气体渗透系数、锂渣掺量与孔体积分形维数、孔轴线分形维数之间的关系。结果表明,混凝土的气体渗透系数与孔体积分形维数相关性高;C60混凝土在锂渣掺量为10%时,孔体积分形维数和孔轴线分形维数最大;随着锂渣掺量的提高,C30混凝土孔体积分形维数和孔轴线分形维数呈降低的趋势。
In this study,we attempt to recover the relationship between pore fractal dimension and air permeability of lithium slag concrete.The pore structure parameters of C30 and C60 in different lithium slag content were tested by mercury intrusion method(MIP)and the fractal dimension of pore volume and the fractal dimension of pore axis were calculated.And the relationship between gas permeability coefficient,the amount of lithium slag and the integral fractal dimension and the fractal dimension of the hole are studied.The results show that the gas permeability coefficient of concrete is highly correlated with the integral fractal dimension of the hole.For C60,the maximum pore volume dimension and the fractal dimension of the hole axis were obtained when the lithium slag content was 10%.For C30,with the addition of the lithium slag,the pore volume fractal dimension and the pore axis showed a decreasing trend.
In this study,we attempt to recover the relationship between pore fractal dimension and air permeability of lithium slag concrete.The pore structure parameters of C30 and C60 in different lithium slag content were tested by mercury intrusion method(MIP)and the fractal dimension of pore volume and the fractal dimension of pore axis were calculated.And the relationship between gas permeability coefficient,the amount of lithium slag and the integral fractal dimension and the fractal dimension of the hole are studied.The results show that the gas permeability coefficient of concrete is highly correlated with the integral fractal dimension of the hole.For C60,the maximum pore volume dimension and the fractal dimension of the hole axis were obtained when the lithium slag content was 10%.For C30,with the addition of the lithium slag,the pore volume fractal dimension and the pore axis showed a decreasing trend.
引文
[1]施惠生,许碧莞.粉煤灰高性能混凝土气体渗透性能研究[J].同济大学学报(自然科学版),2007(9):1230-1234.
[2]陆安群,张守治,姚婷.孔结构表征技术在水泥基材料孔隙结构分析中的应用[J].混凝土,2014(6):6-8+12.
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[4]罗明勇,曾强,庞晓贇,等.养护条件对水泥基材料孔隙结构的影响[J].硅酸盐学报,2013(5):597-604.
[5]元成方,高丹盈.聚丙烯纤维混凝土高温后的孔隙结构特征研究[J].华中科技大学学报(自然科学版),2014(4):122-126.
[6]郑克仁,蔡峰良,周锡玲.基于氮吸附的水泥-沥青复合硬化体孔结构分析[J].武汉理工大学学报,2013(2):1-5.
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[8]蒋正武,邓子龙,袁政成,等.热孔计法表征不同龄期下混凝土孔结构的研究[J].建筑材料学报,2013(6):1044-1048.
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[10]韦江雄,余其俊,曾小星,等.混凝土中孔结构的分形维数研究[J].华南理工大学学报(自然科学版),2007(2):121-124.
[11]金珊珊,张金喜,李爽.混凝土孔结构分形特征的研究现状与进展[J].混凝土,2009(10):34-37+42.
[12]唐明,王甲春.压汞测孔评价混凝土材料孔隙分形特征的研究[J].沈阳建筑工程学院学报(自然科学版),2001(4):272-275.
[13]唐明,李婧琦.混凝土碳化深度的精细测量与分形特征[J].沈阳建筑大学学报(自然科学版),2013(2):313-319.
[14]张建波.混凝土孔隙分形特征表征氯离子渗透性能研究[D].北京:中国建筑材料科学研究总院,2010.
[15]董海蛟,温勇,张广泰,等.荷载作用下锂渣粉对混凝土氯离子渗透性的影响[J].混凝土,2014(10):12-15.
[16]李永鑫,陈益民,贺行洋,等.粉煤灰-水泥浆体的孔体积分形维数及其与孔结构和强度的关系[J].硅酸盐学报,2003(8):774-779.
[17]冯庆革,梁正义,郭建强,等.孔隙分形修正的混凝土中氯离子扩散系数[J].土木建筑与环境工程,2015(4):51-58.
[2]陆安群,张守治,姚婷.孔结构表征技术在水泥基材料孔隙结构分析中的应用[J].混凝土,2014(6):6-8+12.
[3]KAUFMANN J.Pore space analysis of cement-based materials bycombined Nitrogen sorption Wood′s metal impregnation and multicycle mercury intrusion[J].Cement and Concrete Composites,2010,32(7):514-522.
[4]罗明勇,曾强,庞晓贇,等.养护条件对水泥基材料孔隙结构的影响[J].硅酸盐学报,2013(5):597-604.
[5]元成方,高丹盈.聚丙烯纤维混凝土高温后的孔隙结构特征研究[J].华中科技大学学报(自然科学版),2014(4):122-126.
[6]郑克仁,蔡峰良,周锡玲.基于氮吸附的水泥-沥青复合硬化体孔结构分析[J].武汉理工大学学报,2013(2):1-5.
[7]佘安明,姚武.质子核磁共振技术研究水泥早期水化过程[J].建筑材料学报,2010,13(3):376-379.
[8]蒋正武,邓子龙,袁政成,等.热孔计法表征不同龄期下混凝土孔结构的研究[J].建筑材料学报,2013(6):1044-1048.
[9]孙振平,俞洋,庞敏,等.低场核磁共振技术在水泥基材料研究中的应用及展望[J].材料导报,2011(7):110-113.
[10]韦江雄,余其俊,曾小星,等.混凝土中孔结构的分形维数研究[J].华南理工大学学报(自然科学版),2007(2):121-124.
[11]金珊珊,张金喜,李爽.混凝土孔结构分形特征的研究现状与进展[J].混凝土,2009(10):34-37+42.
[12]唐明,王甲春.压汞测孔评价混凝土材料孔隙分形特征的研究[J].沈阳建筑工程学院学报(自然科学版),2001(4):272-275.
[13]唐明,李婧琦.混凝土碳化深度的精细测量与分形特征[J].沈阳建筑大学学报(自然科学版),2013(2):313-319.
[14]张建波.混凝土孔隙分形特征表征氯离子渗透性能研究[D].北京:中国建筑材料科学研究总院,2010.
[15]董海蛟,温勇,张广泰,等.荷载作用下锂渣粉对混凝土氯离子渗透性的影响[J].混凝土,2014(10):12-15.
[16]李永鑫,陈益民,贺行洋,等.粉煤灰-水泥浆体的孔体积分形维数及其与孔结构和强度的关系[J].硅酸盐学报,2003(8):774-779.
[17]冯庆革,梁正义,郭建强,等.孔隙分形修正的混凝土中氯离子扩散系数[J].土木建筑与环境工程,2015(4):51-58.