浮石混凝土风沙吹蚀与冻融耦合的破坏机理研究
|
摘要
以内蒙古天然浮石作为粗骨料,配置3种强度的浮石混凝土.利用气流携沙法和快冻法研究浮石混凝土在风沙吹蚀与冻融耦合破坏中的耐久性,分析质量损失及相对动弹性模量的变化规律,并进行核磁共振测试,探究破坏机理.结果表明,风沙吹蚀与冻融耦合破坏相比单一因素破坏更为严重;风沙吹蚀起到"催化"作用,破坏混凝土表面水泥砂浆层,加快了冻融破坏;相对动弹模量比质量损失率更为敏感,更能表现混凝土的破坏程度;核磁共振表明水灰比越大,混凝土内部有害的大孔越多,自由流体饱和度可作为评判浮石混凝土耐久性的一个指标;北方寒带风沙区的建筑物的重要结构,应增防风沙设施,才能更好延长使用寿命.
The pumice concrete with three kinds of strength were prepared using the natural pumice in Inner Mongolia as the coarse aggregate.The durability of pumice concrete under wind-sand erosion and freeze-thaw coupling damage was studied through the airflow sand-carrying method and quick freezing method,the change rule of mass loss and relative dynamic elastic modulus was analyzed and the nuclear magnetic resonance was performed to investigate the changes in inner pores.The results showed that the damage under wind-sand erosion and freeze-thaw coupling is more serious than that under single factor,and the wind-sand erosion process plays a role of "catalyzing" in the damage,which destroys the cement mortar layer on the concrete thus accelerating the freeze-thaw damage;the relative dynamic elastic modulus is more sensitive than the mass loss rate,and can reflect the degree of damage to the concrete better.NMR showed that the concrete with a larger water-cement ratio has more harmful large-size pore,free fluid saturation can be used as an indicator of the durability of pumice concrete;the important structure of the buildings in the northern frozen and wind-sand areas should be increased anti-sand facilities to prolong their service life.
The pumice concrete with three kinds of strength were prepared using the natural pumice in Inner Mongolia as the coarse aggregate.The durability of pumice concrete under wind-sand erosion and freeze-thaw coupling damage was studied through the airflow sand-carrying method and quick freezing method,the change rule of mass loss and relative dynamic elastic modulus was analyzed and the nuclear magnetic resonance was performed to investigate the changes in inner pores.The results showed that the damage under wind-sand erosion and freeze-thaw coupling is more serious than that under single factor,and the wind-sand erosion process plays a role of "catalyzing" in the damage,which destroys the cement mortar layer on the concrete thus accelerating the freeze-thaw damage;the relative dynamic elastic modulus is more sensitive than the mass loss rate,and can reflect the degree of damage to the concrete better.NMR showed that the concrete with a larger water-cement ratio has more harmful large-size pore,free fluid saturation can be used as an indicator of the durability of pumice concrete;the important structure of the buildings in the northern frozen and wind-sand areas should be increased anti-sand facilities to prolong their service life.
引文
[1] 薛慧君,申向东,邹春霞,等.浮石及浮石轻骨料混凝土材料研究进展[J].硅酸盐通报,2016,(5):1536-1540+1546 Xue Huijun,Shen Xiangdong,Zou Chunxia,et al.Research progress of pumice and pumice lightweight aggregate concrete materials[J].Bulletin of the Chinese Ceramic Society,2016,(5):1536-1540+1546
[2] 杨新磊.浮石及其混凝土的性能与应用研究[D].天津:河北工业大学,2004 Yang Xinlei,Research on the performance and its application of pumice and pumice-concrete[D].Tianjin:Hebei University of Technology,2004
[3] 曹刚.高强轻骨料混凝土试验研究[D].西安:西北工业大学,2004 Cao Gang.Experimental study of high strength lightweight aggregate concrete[D].Xi'an:Northwestern Polytechnical University,2004
[4] 董伟,申向东,赵占彪,等.风积沙轻骨料混凝土冻融损伤及寿命预测研究[J].冰川冻土,2015,(4):1009-1015 Dong Wei,Shen Xiangdong,Zhao Zhanbiao,et al.Study of the freezing-thawing damage and life prediction of aeolian lightweight aggregate concrete[J].Journal of Glaciology and Geocryology,2015,(4):1009-1015
[5] 储建军,霍俊芳.混合骨料混凝土抗冻性能试验研究[J].建筑科学,2011,(增1):22-24 Chu Jianjun,Huo Junfang.Experimental study on frost resistance properties of mixed aggregate concrete[J].Building Science,2011,(S1):22-24
[6] 王海龙,申向东.轻骨料混凝土早期力学性能与抗冻性能的试验研究[J].硅酸盐通报,2008(5):1018-1022 Wang Hailong,Shen Xiangdong.The study on early mechanics and frost resistance of lightweight aggregate concrete[J].Bulletin of the Chinese Ceramic Society,2008,(5):1018-1022
[7] Duzgun O A,Gul R,Aydin A C.Effect of steel fibers on the mechanical properties of natural lightweight aggregate concrete[J].Materials Letters,2005,59(27):3357-3363
[8] Alshihri M M,Azmy A M,El-Bisy M S.Neural networks for predicting compressive strength of structural light weight concrete[J].Construction & Building Materials,2009,23(6):2214-2219
[9] Sengul O,Azizi S,Karaosmanoglu F,et al.Effect of expanded perlite on the mechanical properties and thermal conductivity of lightweight concrete[J].Energy & Buildings,2011,43(2-3):671-676
[10] 金燕,晏红明,严华生,等.亚欧大陆经向热力差异对亚洲季风的影响Ⅰ:与东亚冬季风的关系[J].云南大学学报(自然科学版),2012,(2):177-184 Jin Yan,Yan Hongming,Yan Huasheng,et al.A research on the Influence of meridional heat difference on the Eurasian to Asian Monsoon I:association with the east Asian winter monsoon[J].Journal of Yunnan University(Natural Science Edition),2012,(2):177-184
[11] 王式功,董光荣,陈惠忠,等.沙尘暴研究的进展[J].中国沙漠,2000,(4):5-12 Wang Shigong,Dong Guangrong,Chen Huizhong,et al.Advances in studying sand-dust storms of China[J].Journal of Desert Research,2000,(4):5-12
[12] 李金玉,曹建国,徐文雨,等.混凝土冻融破坏机理的研究[J].水利学报,1999,(1):42-50 Li Jinyu,Cao Jianguo,Xu Wenyu,et al.Study on the mechanism of concrete destruction under frost action[J].Journal of Hydraulic Engineering,1999,(1):42-50
[13] 王萧萧,申向东,王海龙,等.盐蚀-冻融循环作用下天然浮石混凝土的抗冻性[J].硅酸盐学报,2014,(11):1414-1421 Wang Xiaoxiao,Shen Xiangdong,Wang Hailong,et al.Frost-resistance of natural pumice concrete due to salt corrosion and freeze-thawcirculation[J].Journal of the Chinese Ceramic Society,2014,(11):1414-1421
[14] Xiaoxiao W,Xiangdong S,Hailong W,et al.Nuclear magnetic resonance analysis of concrete-lined channel freeze-thaw damage[J].Journal of the Ceramic Society of Japan,2015,123(1433):43-51
[15] Dong W,Shen X D,Xue H J,et al,Research on the freeze-thaw cyclic test and damage model of Aeolian sand lightweight aggregate concrete[J].Construction & Building Material,2016,123:792-799
[16] 王彦平,居春常,王起才.冲击参数对兰新铁路混凝土结构冲蚀磨损的影响[J].硅酸盐通报,2013,(4):607-612 Wang Yanping,Ju Chunchang,Wang Qicai.Influence of impact parameters on the erosion wear of Lanxin railway concrete structure[J] Bulletin of the Chinese Ceramic Society,2013,(4):607-612
[17] 王彦平,居春常,王起才.风沙环境下混凝土、砂浆和水泥石的固体颗粒冲蚀磨损试验研究[J].中国铁道科学,2013,(5):21-26 Wang Yanping,Ju Chunchang,Wang Qicai.Experimental study on the solid particle erosion of concrete,mortar and cement Paste under blown sand environment[J].China Railway Science,2013,(5):21-26
[18] 郝贠洪,邢永明,杨诗婷,等.风沙环境下钢结构涂层的冲蚀磨损力学性能研究[J].应用力学学报,2013,(3):350-355+473 Hao Yuanhong,Xing Yongming,Yang Shiting,et al.Structural design of stiffened shells based on imperfection sensitivity analysis[J].Chinese Journal of Applied Mechanics,2013,(3):350-355+473
[19] 郝贠洪,邢永明,赵燕茹,等.风沙环境下钢结构涂层侵蚀机理及评价方法[J].建筑材料学报,2011,(3):345-349+361 Hao Yuanhong,Xing Yongming,Zhao Yanru,et al.Erosion mechanism and evaluation method of steel structure coating eroded under sandstorm environment[J].Journal of Building Materials,2011,(3):345-349+361
[20] 薛慧君,申向东,刘倩,等.高寒灌区风沙吹蚀对农业水利工程混凝土抗冻耐久性的影响[J].农业工程学报,2017,33(15):133-140 Xue Huijun,Shen Xiangdong,Liu Qian,et al.Effect of wind-sand erosion on frost resistance durability of hydraulic engineering concrete in cold irrigation area[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(15):133-140
[21] 薛慧君,申向东,王仁远,等.风沙吹蚀与干湿循环作用下风积沙混凝土抗氯盐侵蚀机理[J].农业工程学报,2017,33(18):118-126 Xue Huijun,Shen Xiangdong,Wang Renyuan,et al.Mechanism analysis of chloride-resistant erosion of aeolian sand concrete under wind-sand erosion and dry-wet circulation[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(18):118-126
[22] 李杰林.基于核磁共振技术的寒区岩石冻融损伤机理试验研究[D].长沙:中南大学,2012 Li Jielin.Experiment study on deterioration mechanism of rock under the conditions of freezing-thawing cycles in cold regions based on NMR technology[D].Changsha:Central South University,2012
[23] 李海波,朱巨义,郭和坤.核磁共振T2谱换算孔隙半径分布方法研究[J].波谱学杂志,2008,(2):273-280 Li Haibo,Zhu Juyi,Guo Hekun.Methods for calculating pore radius distribution in rock from NMR T2 spectra[J].Chinese Journal of Magnetic Resonance,2008,(2):273-280
[24] 吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999 Wu Zhongwei,Lian Huizhen.High-performance concrete[M].Beijing:China Railway Press,1999
[25] 蒋兰兰,宋永臣,刘瑜,等.多孔介质内两相流体流动的核磁共振成像研究[J].Chinese Journal of Chemical Engineering,2013,(1):85-93 Jiang Lanlan,Song Yongchen,Liu Yu,et al.Measurement of two phase flow in porous medium using high-resolution magnetic resonance imaging[J].Chinese Journal of Chemical Engineering,2013,(1):85-93
[2] 杨新磊.浮石及其混凝土的性能与应用研究[D].天津:河北工业大学,2004 Yang Xinlei,Research on the performance and its application of pumice and pumice-concrete[D].Tianjin:Hebei University of Technology,2004
[3] 曹刚.高强轻骨料混凝土试验研究[D].西安:西北工业大学,2004 Cao Gang.Experimental study of high strength lightweight aggregate concrete[D].Xi'an:Northwestern Polytechnical University,2004
[4] 董伟,申向东,赵占彪,等.风积沙轻骨料混凝土冻融损伤及寿命预测研究[J].冰川冻土,2015,(4):1009-1015 Dong Wei,Shen Xiangdong,Zhao Zhanbiao,et al.Study of the freezing-thawing damage and life prediction of aeolian lightweight aggregate concrete[J].Journal of Glaciology and Geocryology,2015,(4):1009-1015
[5] 储建军,霍俊芳.混合骨料混凝土抗冻性能试验研究[J].建筑科学,2011,(增1):22-24 Chu Jianjun,Huo Junfang.Experimental study on frost resistance properties of mixed aggregate concrete[J].Building Science,2011,(S1):22-24
[6] 王海龙,申向东.轻骨料混凝土早期力学性能与抗冻性能的试验研究[J].硅酸盐通报,2008(5):1018-1022 Wang Hailong,Shen Xiangdong.The study on early mechanics and frost resistance of lightweight aggregate concrete[J].Bulletin of the Chinese Ceramic Society,2008,(5):1018-1022
[7] Duzgun O A,Gul R,Aydin A C.Effect of steel fibers on the mechanical properties of natural lightweight aggregate concrete[J].Materials Letters,2005,59(27):3357-3363
[8] Alshihri M M,Azmy A M,El-Bisy M S.Neural networks for predicting compressive strength of structural light weight concrete[J].Construction & Building Materials,2009,23(6):2214-2219
[9] Sengul O,Azizi S,Karaosmanoglu F,et al.Effect of expanded perlite on the mechanical properties and thermal conductivity of lightweight concrete[J].Energy & Buildings,2011,43(2-3):671-676
[10] 金燕,晏红明,严华生,等.亚欧大陆经向热力差异对亚洲季风的影响Ⅰ:与东亚冬季风的关系[J].云南大学学报(自然科学版),2012,(2):177-184 Jin Yan,Yan Hongming,Yan Huasheng,et al.A research on the Influence of meridional heat difference on the Eurasian to Asian Monsoon I:association with the east Asian winter monsoon[J].Journal of Yunnan University(Natural Science Edition),2012,(2):177-184
[11] 王式功,董光荣,陈惠忠,等.沙尘暴研究的进展[J].中国沙漠,2000,(4):5-12 Wang Shigong,Dong Guangrong,Chen Huizhong,et al.Advances in studying sand-dust storms of China[J].Journal of Desert Research,2000,(4):5-12
[12] 李金玉,曹建国,徐文雨,等.混凝土冻融破坏机理的研究[J].水利学报,1999,(1):42-50 Li Jinyu,Cao Jianguo,Xu Wenyu,et al.Study on the mechanism of concrete destruction under frost action[J].Journal of Hydraulic Engineering,1999,(1):42-50
[13] 王萧萧,申向东,王海龙,等.盐蚀-冻融循环作用下天然浮石混凝土的抗冻性[J].硅酸盐学报,2014,(11):1414-1421 Wang Xiaoxiao,Shen Xiangdong,Wang Hailong,et al.Frost-resistance of natural pumice concrete due to salt corrosion and freeze-thawcirculation[J].Journal of the Chinese Ceramic Society,2014,(11):1414-1421
[14] Xiaoxiao W,Xiangdong S,Hailong W,et al.Nuclear magnetic resonance analysis of concrete-lined channel freeze-thaw damage[J].Journal of the Ceramic Society of Japan,2015,123(1433):43-51
[15] Dong W,Shen X D,Xue H J,et al,Research on the freeze-thaw cyclic test and damage model of Aeolian sand lightweight aggregate concrete[J].Construction & Building Material,2016,123:792-799
[16] 王彦平,居春常,王起才.冲击参数对兰新铁路混凝土结构冲蚀磨损的影响[J].硅酸盐通报,2013,(4):607-612 Wang Yanping,Ju Chunchang,Wang Qicai.Influence of impact parameters on the erosion wear of Lanxin railway concrete structure[J] Bulletin of the Chinese Ceramic Society,2013,(4):607-612
[17] 王彦平,居春常,王起才.风沙环境下混凝土、砂浆和水泥石的固体颗粒冲蚀磨损试验研究[J].中国铁道科学,2013,(5):21-26 Wang Yanping,Ju Chunchang,Wang Qicai.Experimental study on the solid particle erosion of concrete,mortar and cement Paste under blown sand environment[J].China Railway Science,2013,(5):21-26
[18] 郝贠洪,邢永明,杨诗婷,等.风沙环境下钢结构涂层的冲蚀磨损力学性能研究[J].应用力学学报,2013,(3):350-355+473 Hao Yuanhong,Xing Yongming,Yang Shiting,et al.Structural design of stiffened shells based on imperfection sensitivity analysis[J].Chinese Journal of Applied Mechanics,2013,(3):350-355+473
[19] 郝贠洪,邢永明,赵燕茹,等.风沙环境下钢结构涂层侵蚀机理及评价方法[J].建筑材料学报,2011,(3):345-349+361 Hao Yuanhong,Xing Yongming,Zhao Yanru,et al.Erosion mechanism and evaluation method of steel structure coating eroded under sandstorm environment[J].Journal of Building Materials,2011,(3):345-349+361
[20] 薛慧君,申向东,刘倩,等.高寒灌区风沙吹蚀对农业水利工程混凝土抗冻耐久性的影响[J].农业工程学报,2017,33(15):133-140 Xue Huijun,Shen Xiangdong,Liu Qian,et al.Effect of wind-sand erosion on frost resistance durability of hydraulic engineering concrete in cold irrigation area[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(15):133-140
[21] 薛慧君,申向东,王仁远,等.风沙吹蚀与干湿循环作用下风积沙混凝土抗氯盐侵蚀机理[J].农业工程学报,2017,33(18):118-126 Xue Huijun,Shen Xiangdong,Wang Renyuan,et al.Mechanism analysis of chloride-resistant erosion of aeolian sand concrete under wind-sand erosion and dry-wet circulation[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(18):118-126
[22] 李杰林.基于核磁共振技术的寒区岩石冻融损伤机理试验研究[D].长沙:中南大学,2012 Li Jielin.Experiment study on deterioration mechanism of rock under the conditions of freezing-thawing cycles in cold regions based on NMR technology[D].Changsha:Central South University,2012
[23] 李海波,朱巨义,郭和坤.核磁共振T2谱换算孔隙半径分布方法研究[J].波谱学杂志,2008,(2):273-280 Li Haibo,Zhu Juyi,Guo Hekun.Methods for calculating pore radius distribution in rock from NMR T2 spectra[J].Chinese Journal of Magnetic Resonance,2008,(2):273-280
[24] 吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999 Wu Zhongwei,Lian Huizhen.High-performance concrete[M].Beijing:China Railway Press,1999
[25] 蒋兰兰,宋永臣,刘瑜,等.多孔介质内两相流体流动的核磁共振成像研究[J].Chinese Journal of Chemical Engineering,2013,(1):85-93 Jiang Lanlan,Song Yongchen,Liu Yu,et al.Measurement of two phase flow in porous medium using high-resolution magnetic resonance imaging[J].Chinese Journal of Chemical Engineering,2013,(1):85-93
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |