基于光学法的纤维增强RPC力学性能及微观结构分形特征研究
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摘要
为探究纤维增强活性粉末混凝土(Reactive Powder Concrete,RPC)的宏观力学性能与微观孔隙结构特征之间的关系,测试了不同水胶比、不同河砂替代率的RPC抗压、抗折强度,并基于光学法测定了其微观孔结构参数;建立了基于气泡分布的分形模型并计算出了RPC的气泡分布分形维数;最后通过试验数据拟合,分析了气泡分形维数与孔结构参数及RPC力学性能之间的关系.结果表明:RPC基体的气泡分布具有明显的分形特征,气泡分布分形维数在2.1～2.3之间;分形维数越大,基体孔隙结构的空间分布形态越复杂;RPC基体的含气量不具备分形理论的特征,而气泡平均弦长、气泡比表面积与气泡分布分形维数呈现明显的指数相关性;RPC抗压强度、抗折强度随分形维数增大,呈明显指数增大关系.
To explore the relationship between the macro mechanical properties and the microscopic pore structure characteristics of the fiber reinforced reactive powder concrete(Reactive Powder Concrete,RPC),the compressive and flexural strength tests were performed on RPC with different water-binder ratios and different river sand replacement ratios.Meanwhile the microscopic pore structure parameters of RPC were observed by using the optical method.The fractal model based on the bubble distribution of the RPC matrix was established and the fractal dimension was calculated.Finally,the relations of the bubble fractal dimension with the pore structure parameters and the RPC mechanical properties were analyzed by fitting the experimental data.The results show that the bubble distribution of the RPC matrix exhibits obvious fractal features and the fractal dimension ranges from 2.1 to 2.3;the larger the fractal dimension,the more complex the spatial distribution of the pore structure of the RPC matrix;the gas content of the RPC matrix does not have the fractal features,while the average chord length and the specific surface area of the bubbles present obvious exponential correlation with the bubble distribution fractal dimension;the compressive strength and flexural strength of RPC increase exponentially with the increase of the fractal dimension.
To explore the relationship between the macro mechanical properties and the microscopic pore structure characteristics of the fiber reinforced reactive powder concrete(Reactive Powder Concrete,RPC),the compressive and flexural strength tests were performed on RPC with different water-binder ratios and different river sand replacement ratios.Meanwhile the microscopic pore structure parameters of RPC were observed by using the optical method.The fractal model based on the bubble distribution of the RPC matrix was established and the fractal dimension was calculated.Finally,the relations of the bubble fractal dimension with the pore structure parameters and the RPC mechanical properties were analyzed by fitting the experimental data.The results show that the bubble distribution of the RPC matrix exhibits obvious fractal features and the fractal dimension ranges from 2.1 to 2.3;the larger the fractal dimension,the more complex the spatial distribution of the pore structure of the RPC matrix;the gas content of the RPC matrix does not have the fractal features,while the average chord length and the specific surface area of the bubbles present obvious exponential correlation with the bubble distribution fractal dimension;the compressive strength and flexural strength of RPC increase exponentially with the increase of the fractal dimension.
引文
[1] Richard P,Cheyrezy M.Composition of reactive powder concrete[J].Cement and Concrete Research,1995,25(7):1501-1511
[2] Cheyrezy M,Maret V,Frouin L.Micro-structural analysis of RPC (reactive powder concrete)[J].Cement and Concrete Research,1995,25(7):1491-1497
[3] 鞠彦忠,王德弘,康孟新.不同钢纤维掺量活性粉末混凝土力学性能的试验研究[J].应用基础与工程科学学报,2013,21(2):301-306 Ju Yanzhong,Wang Dehong,Kang Mengxin.Experimental study on mechanical properties of reactive powder concrete with different amount of steel fiber[J].Journal of Basic Science and Engineering,2013,21(2):301-306
[4] 鞠彦忠,王德弘,李秋晨,等.钢纤维掺量对活性粉末混凝土力学性能的影响[J].实验力学,2011,26(3):254-260 Ju Yanzhong,Wang Dehong,Li Qiuchen,et al.Effect of steel fiber content on mechanical properties of reactive powder concrete[J].Journal of Experimental Mechanics,2011,26(3):254-260
[5] 张金喜,金珊珊.水泥混凝土微观孔隙结构及其作用[M].北京:科学出版社,2014 Zhang Jinxi,Jin Shanshan.Microscopic pore structure of cementconcrete and its effect[M].Beijing:Science Press,2014
[6] 吴中伟.混凝土科学技术的反思[J].混凝土与水泥制品,1988,30(6):4-8 Wu Zhongwei.Reflection on concrete science and technology[J].China Concrete and Cement Products,1988,30(6):4-8
[7] 刘红彬,鞠杨,彭瑞东,等.低水胶比偏高岭土混凝土的强度和细观结构的分形特征[J].煤炭学报,2015,40(8):1820-1825 Liu Hongbin,Ju Yang,Peng Ruidong,et al.Strength and fractal characteristic of meso-structure of concrete with metakaolin and low water-binder ratio[J].Journal of China Coal Society,2015,40(8):1820-1825
[8] 刘红彬,鞠杨,孙华飞,等.高温作用下活性粉末混凝土(RPC)孔隙结构的分形特征[J].煤炭学报,2013,38(9):1583-1588 Liu Hongbin,Ju Yang,Sun Huafei,et al.Investigation on fractal characteristic of reactive powder concrete (RPC)pore structure subject to high temperature[J].Journal of China Coal Society,2013,38(9):1583-1588
[9] 于蕾,张君,张金喜,等.水泥混凝土宏观性能与孔结构量化关系模型[J].哈尔滨工程大学学报,2015,36(11):1459-1464 Yu Lei,Zhang Jun,Zhang Jinxi,et al.Quantitative relation model between macro performance and pore structure of cement concrete[J].Journal of Harbin Engineering University,2015,36(11):1459-1464
[10] 熊焱,吴迪,刘赋安.基于微观结构分析的再碱化对高温后混凝土抗压强度修复试验研究[J].工程力学,2013,30(6):205-211 Xiong Yan,Wu Di,Liu Fuan.Experimental study on realkalization repair of concrete compressive strength after high-temperature based on microstructure analysis[J].Engineering Mechanics,2013,30(6):205-211
[11] 金南国,金贤玉,郭剑飞.混凝土孔结构与强度关系模型研究[J].浙江大学学报,2015,39(11):1680-1684 Jin Nanguo,Jin Xianyu,Guo Jianfei.Relationship modeling of pore structure and strength of concrete[J].Journal of Zhejiang University,2015,39(11):1680-1684
[12] 谢超,王起才,李盛,等.不同水灰比、养护条件下混凝土孔结构、抗压强度与分形维数之间的关系[J].硅酸盐通报,2015,34(12):3695-3702 Xie Chao,Wang Qicai,Li Sheng,et al.Relations of pore fractral dimension to pore structure and compressive strength of concrete under different water to binder ratio and curing condition[J].Bulletin of the Chinese Ceramic Society,2015,34(12):3695-3702
[13] 郑山锁,秦卿,任梦宁,等.基于Najar能量法的混凝土分形损伤本构模型研究[J].功能材料,2015,46(21):21001-21006 Zheng Shansuo,Qin Qing,Ren Mengning,et al.Study on fractal damage constitutive laws of concrete based on Najar energy method[J].Journal of Functional Materials,2015,46(21):21001-21006
[14] 唐明,李晓.多种因素对混凝土孔结构分形特征的影响研究[J].沈阳建筑大学学报,2005,21(3):232-237 Tang Ming,Li Xiao.Influence study of various factors on fractal characteristics of concrete pore structure[J].Journal of Shenyang Jianzhu University,2005,21(3):232-237
[15] 胡海霞,章青,丁道红.基于分形理论的混凝土材料力学性能研究[J].混凝土,2010,(6):21-36 Hu Haixia,Zhang qing,Ding Daohong.Study on the mechanical properties of the concrete material based on the fractal theory[J].Concrete,2010,(6):21-36
[16] 张文生,张建波,李建勇,等.混凝土孔隙面分形特征与测试方法研究[J].建筑材料学报,2012,15(3):312-316 Zhang Wensheng,Zhang Jianbo,Li Jianyong,et al.Research of pore area fractal characteristic of concrete and its test method[J].Journal of Building Materials,2012,15(3):312-316
[17] 周明杰,孟雅,田川,等.基于分形理论的泡沫混凝土强度研究[J].建筑节能,2014,(10):46-48 Zhou Mingjie,Meng Ya,Tian Chuan,et al.Strength of foamed concrete based on fractal theory[J].Building Energy Efficiency,2014,(10):46-48
[18] 中国国家标准化管理委员会.GB/T 31387—2015 活性粉末混凝土[S].北京:中国标准出版社,2015 The Standardization Administration of China.GB/T 31387—2015 reactive powder concrete[S].Beijing:Standards Press of China,2015
[2] Cheyrezy M,Maret V,Frouin L.Micro-structural analysis of RPC (reactive powder concrete)[J].Cement and Concrete Research,1995,25(7):1491-1497
[3] 鞠彦忠,王德弘,康孟新.不同钢纤维掺量活性粉末混凝土力学性能的试验研究[J].应用基础与工程科学学报,2013,21(2):301-306 Ju Yanzhong,Wang Dehong,Kang Mengxin.Experimental study on mechanical properties of reactive powder concrete with different amount of steel fiber[J].Journal of Basic Science and Engineering,2013,21(2):301-306
[4] 鞠彦忠,王德弘,李秋晨,等.钢纤维掺量对活性粉末混凝土力学性能的影响[J].实验力学,2011,26(3):254-260 Ju Yanzhong,Wang Dehong,Li Qiuchen,et al.Effect of steel fiber content on mechanical properties of reactive powder concrete[J].Journal of Experimental Mechanics,2011,26(3):254-260
[5] 张金喜,金珊珊.水泥混凝土微观孔隙结构及其作用[M].北京:科学出版社,2014 Zhang Jinxi,Jin Shanshan.Microscopic pore structure of cementconcrete and its effect[M].Beijing:Science Press,2014
[6] 吴中伟.混凝土科学技术的反思[J].混凝土与水泥制品,1988,30(6):4-8 Wu Zhongwei.Reflection on concrete science and technology[J].China Concrete and Cement Products,1988,30(6):4-8
[7] 刘红彬,鞠杨,彭瑞东,等.低水胶比偏高岭土混凝土的强度和细观结构的分形特征[J].煤炭学报,2015,40(8):1820-1825 Liu Hongbin,Ju Yang,Peng Ruidong,et al.Strength and fractal characteristic of meso-structure of concrete with metakaolin and low water-binder ratio[J].Journal of China Coal Society,2015,40(8):1820-1825
[8] 刘红彬,鞠杨,孙华飞,等.高温作用下活性粉末混凝土(RPC)孔隙结构的分形特征[J].煤炭学报,2013,38(9):1583-1588 Liu Hongbin,Ju Yang,Sun Huafei,et al.Investigation on fractal characteristic of reactive powder concrete (RPC)pore structure subject to high temperature[J].Journal of China Coal Society,2013,38(9):1583-1588
[9] 于蕾,张君,张金喜,等.水泥混凝土宏观性能与孔结构量化关系模型[J].哈尔滨工程大学学报,2015,36(11):1459-1464 Yu Lei,Zhang Jun,Zhang Jinxi,et al.Quantitative relation model between macro performance and pore structure of cement concrete[J].Journal of Harbin Engineering University,2015,36(11):1459-1464
[10] 熊焱,吴迪,刘赋安.基于微观结构分析的再碱化对高温后混凝土抗压强度修复试验研究[J].工程力学,2013,30(6):205-211 Xiong Yan,Wu Di,Liu Fuan.Experimental study on realkalization repair of concrete compressive strength after high-temperature based on microstructure analysis[J].Engineering Mechanics,2013,30(6):205-211
[11] 金南国,金贤玉,郭剑飞.混凝土孔结构与强度关系模型研究[J].浙江大学学报,2015,39(11):1680-1684 Jin Nanguo,Jin Xianyu,Guo Jianfei.Relationship modeling of pore structure and strength of concrete[J].Journal of Zhejiang University,2015,39(11):1680-1684
[12] 谢超,王起才,李盛,等.不同水灰比、养护条件下混凝土孔结构、抗压强度与分形维数之间的关系[J].硅酸盐通报,2015,34(12):3695-3702 Xie Chao,Wang Qicai,Li Sheng,et al.Relations of pore fractral dimension to pore structure and compressive strength of concrete under different water to binder ratio and curing condition[J].Bulletin of the Chinese Ceramic Society,2015,34(12):3695-3702
[13] 郑山锁,秦卿,任梦宁,等.基于Najar能量法的混凝土分形损伤本构模型研究[J].功能材料,2015,46(21):21001-21006 Zheng Shansuo,Qin Qing,Ren Mengning,et al.Study on fractal damage constitutive laws of concrete based on Najar energy method[J].Journal of Functional Materials,2015,46(21):21001-21006
[14] 唐明,李晓.多种因素对混凝土孔结构分形特征的影响研究[J].沈阳建筑大学学报,2005,21(3):232-237 Tang Ming,Li Xiao.Influence study of various factors on fractal characteristics of concrete pore structure[J].Journal of Shenyang Jianzhu University,2005,21(3):232-237
[15] 胡海霞,章青,丁道红.基于分形理论的混凝土材料力学性能研究[J].混凝土,2010,(6):21-36 Hu Haixia,Zhang qing,Ding Daohong.Study on the mechanical properties of the concrete material based on the fractal theory[J].Concrete,2010,(6):21-36
[16] 张文生,张建波,李建勇,等.混凝土孔隙面分形特征与测试方法研究[J].建筑材料学报,2012,15(3):312-316 Zhang Wensheng,Zhang Jianbo,Li Jianyong,et al.Research of pore area fractal characteristic of concrete and its test method[J].Journal of Building Materials,2012,15(3):312-316
[17] 周明杰,孟雅,田川,等.基于分形理论的泡沫混凝土强度研究[J].建筑节能,2014,(10):46-48 Zhou Mingjie,Meng Ya,Tian Chuan,et al.Strength of foamed concrete based on fractal theory[J].Building Energy Efficiency,2014,(10):46-48
[18] 中国国家标准化管理委员会.GB/T 31387—2015 活性粉末混凝土[S].北京:中国标准出版社,2015 The Standardization Administration of China.GB/T 31387—2015 reactive powder concrete[S].Beijing:Standards Press of China,2015
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