氧化石墨烯对再生混凝土气体渗透性能影响
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摘要
目的研究多掺量氧化石墨烯(GO)对不同龄期再生混凝土的气体渗透性能的影响.方法采用TEM、EDS及FTIR对GO进行测试、表征,采用超声法制备GO分散液,并对GO掺量为0、0.03%、0.06%、0.09%的再生混凝土,在7 d、14 d、28 d龄期下进行气体渗透性能试验.结果 GO的掺入使不同龄期再生混凝土的气体渗透系数均有所降低,其中掺量为0.06%时渗透系数为0.064、0.037、0.024,改善最为明显.结论 GO的凝结核效应能够调节水泥基材料的晶体结构,改善再生混凝土微观裂隙,使得不同龄期再生混凝土的气体渗透系数降低18%～62%,对提高其耐久性具有重要意义.
In this paper,the effects of multi-content graphene oxide(GO)on gas permeability of recycled concrete at different ages were studied.TEM,EDS and FTIR were used to test and characterize GO.GO dispersions were prepared by ultrasonic method.The gas permeability of recycled concrete with GO content of 0,0.03%,0.06% and 0.09% were tested at 7,14 and 28 days.The gas permeability coefficient of recycled concrete at different ages decreases with the addition of GO.When the proportion is 0.06%,the permeability coefficient is 0.064,0.037 and 0.024,which is the most obvious improvement for recycled concrete.The condensation nucleation effect of GO can adjust the crystal structure of cement based materials and improve the micro cracks of recycled aggregate concrete,so that the gas permeability coefficient of recycled concrete in different ages decreases by 18%-62%,which is of great significance for improving its durability.
In this paper,the effects of multi-content graphene oxide(GO)on gas permeability of recycled concrete at different ages were studied.TEM,EDS and FTIR were used to test and characterize GO.GO dispersions were prepared by ultrasonic method.The gas permeability of recycled concrete with GO content of 0,0.03%,0.06% and 0.09% were tested at 7,14 and 28 days.The gas permeability coefficient of recycled concrete at different ages decreases with the addition of GO.When the proportion is 0.06%,the permeability coefficient is 0.064,0.037 and 0.024,which is the most obvious improvement for recycled concrete.The condensation nucleation effect of GO can adjust the crystal structure of cement based materials and improve the micro cracks of recycled aggregate concrete,so that the gas permeability coefficient of recycled concrete in different ages decreases by 18%-62%,which is of great significance for improving its durability.
引文
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[15] 吕生华,孙婷,马宇娟,等.纳米氧化石墨烯对水泥复合材料中水化晶体结构的控制及增韧作用[J].混凝土,2013(11):41-46.(Lü Shenghua,SUN Ting,MA Yujuan,et al.Regulation of grapheme oxide on microstructure of hydration crystals of cement composites and its impact on reinforcing toughenss[J].Concrete,2013(11):41-46.)
[16] LU Liulei,OUYANG Dong.Properties of cement mortar and ultra-high strength concrete incorporating graphene oxide nanosheets[J].Nanomaterials,2017,7(7):187.
[17] 雷斌,邹俊,饶春华,等.氧化石墨烯对再生混凝土改性试验研究[J].建筑结构学报,2016,102(6):24-28.(LEI Bin,ZOU Jun,RAO Chunhua,et al.Experimental study on modification of recycled concrete with graphene oxide[J].Journal of building structures,2016,102(6):24-28.)
[18] 桂强,秦敏峰,李克非.水泥基材料气体渗透性研究进展[J].硅酸盐学报,2015,43(10):1500-1510.(GUI Qiang,QIN Minfeng,LI Kefei.Recent research development on gas permeability of cement-based materials[J].Journal of the Chinese ceramic society,2015,43(10):1500-1510.)
[19] VILLAR M V,MARTíN P L,ROMERO F J,et al.Gas and water permeability of concrete[J].Geological society,2015,415(1):59-73.
[20] 袁小亚.石墨烯的制备研究进展[J].无机材料学报,2011,26(6):561-570.(YUAN Xiaoya.Progress in preparation of graphene[J].Journal of inorganic materials,2011,26(6):561-570.)
[21] 胡耀娟,金娟,张卉,等.石墨烯的制备、功能化及在化学中的应用[J].物理化学学报,2010,26(8):2073-2086.(HU Yaojuan,JIN Juan,ZHANG Hui,et al.Graphene:synthesis,functionalization and applications in chemistry[J].Acta physico-chimica sinica,2010,26(8):2073-2086.)
[22] 黄海平,朱俊杰.新型碳材料-石墨烯的制备及其在电化学中的应用[J].分析化学,2011,39(7):963-971.(HUANG Haiping,ZHU Junjie.Preparation of novel carbon-based nanomaterial of graphene and its applications for electrochemistry[J].Chinese journal of analytical chemistry,2011,39(7):963-971.)
[23] 邓尧,黄肖容,邬晓龄.氧化石墨烯复合材料的研究进展[J].材料导报,2012,26(15):84-87.(DENG Yao,HUANG Xiaorong,WU Xiaoling.Review on graphene oxide composites[J].Materials review,2012,26(15):84-87.)
[2] 周静海,何海进,孟宪宏,等.再生混凝土基本力学性能试验[J].沈阳建筑大学学报(自然科学版),2010,26(3):464-467.(ZHOU Jinghai,HE Haijin,MENG Xianhong,et al.Basic mechanical properties of recycled concrete experimental study[J].Journal of Shenyang jianzhu university(natural science),2010,26(3):464-467.)
[3] OMARY S,GHORBEL E,WARDEH G.Relationships between recycled concrete aggregates characteristics and recycled aggregates concrete sproperties[J].Construction & building materials,2016,108:163-172.
[4] XIAO Jianzhuang,LI Wengui,FAN Yuhui,et al.Anoverview of study on recycled aggregate concrete in China(1996–2011)[J].Construction & building materials,2012,31:364-383.
[5] 陈宗平,王妮,郑述芳,等.再生细骨料水泥砂浆的力学性能研究[J].混凝土,2011(8):115-120.(CHEN Zongping,WANG Ni,ZHENG Shufang,et al.Experimental study on mechanical behavior of recycled fine aggregate mortar[J].Concrete,2011(8):115-120.)
[6] 肖建庄,林壮斌,朱军.再生骨料级配对混凝土抗压强度的影响[J].四川大学学报(工程科学版),2014,46(4):154-160.(XIAO Jianzhuang,LIN Zhuangbin,ZHU Jun.Effects of recycled aggregates′ gradation on compressive strength of concrete[J].Journal of Sichuan university(engineering science edition),2014,46(4):154-160.)
[7] 王玲玲,谷亚新,李育霖,等.纳米强化技术对再生混凝土耐久性影响研究[J].混凝土,2014(7):48-51.(WANG Lingling,GU Yaxin,LI Yulin,et al.Effects of nano-strengthening technology on the durability of recycled concrete[J].Concrete,2014(7):48-51.)
[8] CORINALDESI V,MORICONI G.Influence of mineral additions on the performance of 100%recycled aggregate concrete[J].Construction and building materials,2009,23(8):2869-2876.
[9] 洪晓东,陆玉刚,梁兵.氧化石墨烯的改性及其聚合物复合材料的研究进展[J].化工新型材料,2017(3):1-2.(HONG Xiaodong,LU Yugang,LIANG Bing.Progress in functionalized graphene and polymer/graphene composites[J].New chemical materials,2017(3):1-2.)
[10] 曹明莉,张会霞,张聪.石墨烯对水泥净浆力学性能及微观结构的影响[J].哈尔滨工业大学学报,2015(12):26-30.(CAO Mingli,ZHANG Huixia,ZHANG Cong.Effect of graphene on mechanical properties and microstructure of cement paste[J].Journal of Harbin institute of technology,2015(12):26-30.)
[11] BABAK F,ABOLFAZL H,ALIMORAD R,et al.Preparation and mechanical properties of graphene oxide:cement anocomposites[J].The scientific-world journal,2014(4):276-323
[12] 王琴,王健,吕春祥,等.氧化石墨烯对水泥基复合材料微观结构和力学性能的影响[J].新型炭材料,2015(4):349-355.(WANG Qin,WANG Jian,LV Chunxiang,et al.Influence of graphene oxide additions on the microstructure and mechanical strength of cement[J].New carbon materials,2015(4):349-355.)
[13] 王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27.(WANG Hui,LIU Aihong,LI Hang.Influence of graphene nanoplatelets on mechanical properties of cement-based composites[J].China concrete and cement products,2015(12):25-27.)
[14] 彭晖,戈娅萍,杨振天,等.氧化石墨烯增强水泥基复合材料的力学性能及微观结构[J].复合材料学报,2018,35(6):36-43.(PENG Hui,GE Yaping,YANG Zhentian,et al.Mechanical properties and microstructure of graphene oxide reinforced cement-based composites[J].Acta material composite sinica,2018,35(6):36-43.)
[15] 吕生华,孙婷,马宇娟,等.纳米氧化石墨烯对水泥复合材料中水化晶体结构的控制及增韧作用[J].混凝土,2013(11):41-46.(Lü Shenghua,SUN Ting,MA Yujuan,et al.Regulation of grapheme oxide on microstructure of hydration crystals of cement composites and its impact on reinforcing toughenss[J].Concrete,2013(11):41-46.)
[16] LU Liulei,OUYANG Dong.Properties of cement mortar and ultra-high strength concrete incorporating graphene oxide nanosheets[J].Nanomaterials,2017,7(7):187.
[17] 雷斌,邹俊,饶春华,等.氧化石墨烯对再生混凝土改性试验研究[J].建筑结构学报,2016,102(6):24-28.(LEI Bin,ZOU Jun,RAO Chunhua,et al.Experimental study on modification of recycled concrete with graphene oxide[J].Journal of building structures,2016,102(6):24-28.)
[18] 桂强,秦敏峰,李克非.水泥基材料气体渗透性研究进展[J].硅酸盐学报,2015,43(10):1500-1510.(GUI Qiang,QIN Minfeng,LI Kefei.Recent research development on gas permeability of cement-based materials[J].Journal of the Chinese ceramic society,2015,43(10):1500-1510.)
[19] VILLAR M V,MARTíN P L,ROMERO F J,et al.Gas and water permeability of concrete[J].Geological society,2015,415(1):59-73.
[20] 袁小亚.石墨烯的制备研究进展[J].无机材料学报,2011,26(6):561-570.(YUAN Xiaoya.Progress in preparation of graphene[J].Journal of inorganic materials,2011,26(6):561-570.)
[21] 胡耀娟,金娟,张卉,等.石墨烯的制备、功能化及在化学中的应用[J].物理化学学报,2010,26(8):2073-2086.(HU Yaojuan,JIN Juan,ZHANG Hui,et al.Graphene:synthesis,functionalization and applications in chemistry[J].Acta physico-chimica sinica,2010,26(8):2073-2086.)
[22] 黄海平,朱俊杰.新型碳材料-石墨烯的制备及其在电化学中的应用[J].分析化学,2011,39(7):963-971.(HUANG Haiping,ZHU Junjie.Preparation of novel carbon-based nanomaterial of graphene and its applications for electrochemistry[J].Chinese journal of analytical chemistry,2011,39(7):963-971.)
[23] 邓尧,黄肖容,邬晓龄.氧化石墨烯复合材料的研究进展[J].材料导报,2012,26(15):84-87.(DENG Yao,HUANG Xiaorong,WU Xiaoling.Review on graphene oxide composites[J].Materials review,2012,26(15):84-87.)