氧化石墨烯改善水泥材料抗蚀性的研究
|
摘要
通过掺入氧化石墨烯(GO)对高贝利特水泥(HBC)材料的性能进行改性,研究了氧化石墨烯高贝利特水泥材料在硫酸盐、复合盐溶液中的抗蚀性能.研究结果表明,在两种盐溶液侵蚀的条件下,与基准试件相比,当GO掺量为0.05%时,水泥材料的抗折强度、抗压强度和抗蚀性均得到最佳的改善作用.试件微观分析可以得知,在硫酸盐溶液中,试件生成的主要腐蚀产物是钙矾石(AFt),而在复合盐溶液中,除了AFt之外,还存在水化氯铝酸钙(Friedel’s盐).由于GO对水泥水化具有促进作用,在侵蚀环境中能够提供较多Ca(OH)_2与硫酸根离子和氯离子发生反应,使AFt和Friedel’s盐的生成量增加,水泥内部结构更为密实,从而提高水泥材料的抗蚀性.试验结果对高贝利特水泥在易受环境侵蚀的工程中的应用有着远大的发展前景.
The properties of High Blite Cement(HBC) were modified by adding graphene oxide(GO)and the erosion resistance of graphene oxide on HBC immersing into sulfate and complex salt solution was studied. The result showed that when the addition content of GO was 0.05%, the flexural strength,compression strength and erosion resistance were considerably improved under the condition of two kinds of salt solution. The micro-analysis of specimens showed that in sulfate solution, the main erosion product of specimen was ettringite(AFt), while in complex solution, there was hydrocalumite(Friedel's salt) except for AFt. GO could promote the hydration function of cement, which provides much Ca(OH)_2 to react with sulfate ion and chloride ion in erosion solution so that the amount of AFt and Friedel's salt was improved, the internal structure of cement was more dense and the erosion resistance of cement materials was improved. The prospect for application of HBC in projects susceptible to environmental erosion is good.
The properties of High Blite Cement(HBC) were modified by adding graphene oxide(GO)and the erosion resistance of graphene oxide on HBC immersing into sulfate and complex salt solution was studied. The result showed that when the addition content of GO was 0.05%, the flexural strength,compression strength and erosion resistance were considerably improved under the condition of two kinds of salt solution. The micro-analysis of specimens showed that in sulfate solution, the main erosion product of specimen was ettringite(AFt), while in complex solution, there was hydrocalumite(Friedel's salt) except for AFt. GO could promote the hydration function of cement, which provides much Ca(OH)_2 to react with sulfate ion and chloride ion in erosion solution so that the amount of AFt and Friedel's salt was improved, the internal structure of cement was more dense and the erosion resistance of cement materials was improved. The prospect for application of HBC in projects susceptible to environmental erosion is good.
引文
[1]林晖,侯捷,卢小琳,等.硫酸盐对水泥基材料微观结构的影响[J].混凝土,2005(11):7-10.
[2]马昆林,谢友均,龙广成,等.水泥基材料在硫酸盐结晶侵蚀下的劣化行为[J].中南大学学报(自然科学版),2010,41(1):303-309.
[3]刘超,马忠诚,刘浩云.水泥混凝土硫酸盐侵蚀综述[J].材料导报,2013,27(7):67-71.
[4]杨建森.氯盐对混凝土中钢筋的腐蚀机理与防腐技术[J].混凝土,2001(7):52-56.
[5]袁廷朋,王兆瑞,张鑫.氯盐对混凝土中钢筋的锈蚀机理与防腐技术[J].山东建筑工程学院学报,2005(1):87-90.
[6]王晓冬,李东寅,李国瑞.混凝土结构的氯盐侵蚀与钢筋锈蚀[J].工程建设,2007(2):26-30.
[7]冯庆革,黄小玲,罗学波,等.含氯盐及不含氯盐混凝土浆体的水化进程研究[J].广西大学学报(自然科学版),2011,36(4):683-688.
[8]施惠生,王琼.掺复合胶凝材料混凝土的抗氯离子侵蚀性能[J].同济大学学报(自然科学版),2004,32(4):490-493.
[9]李永强,巴明芳,柳俊哲,等.干湿循环作用下水泥基复合材料抗氯离子侵蚀性能及其微观结构变化[J].复合材料学报,2017,34(12):2856-2865.
[10]JIANG L,NIU D T.Study of deterioration of concrete exposed to different types of sulfate solutions under drying-wetting cycles[J].Construction and Building Materials,2016,117:88-98.
[11]王旭,黄小青,江英.掺硫酸渣粉水泥砂浆的抗硫酸盐侵蚀性能[J].广西科技大学学报,2018,29(2):97-102.
[12]张椿民,连金明,刘锋.再生粗骨料混凝土钢筋锈蚀试验研究[J].广西科技大学学报,2016,27(3):76-81.
[13]袁小亚,曾俊杰,肖桂兰.氧化石墨烯与石墨烯复掺对水泥砂浆力学性能及耐硫酸盐腐蚀性能研究[J/OL].重庆交通大学学报(自然科学版),(2018-11-16)[2018-12-03].http://kns.cnki.net/kcms/detail/50.1190.U.20181116.1000.014.html.
[14]薛立强.氧化石墨烯对隧道衬砌混凝土性能的影响[J].科学技术与工程,2017,17(22):124-128.
[15]杨雅玲,袁小亚,沈旭,等.氧化石墨烯改性水泥砂浆耐腐蚀性能的研究[J].功能材料,2017,48(5):5144-5148.
[2]马昆林,谢友均,龙广成,等.水泥基材料在硫酸盐结晶侵蚀下的劣化行为[J].中南大学学报(自然科学版),2010,41(1):303-309.
[3]刘超,马忠诚,刘浩云.水泥混凝土硫酸盐侵蚀综述[J].材料导报,2013,27(7):67-71.
[4]杨建森.氯盐对混凝土中钢筋的腐蚀机理与防腐技术[J].混凝土,2001(7):52-56.
[5]袁廷朋,王兆瑞,张鑫.氯盐对混凝土中钢筋的锈蚀机理与防腐技术[J].山东建筑工程学院学报,2005(1):87-90.
[6]王晓冬,李东寅,李国瑞.混凝土结构的氯盐侵蚀与钢筋锈蚀[J].工程建设,2007(2):26-30.
[7]冯庆革,黄小玲,罗学波,等.含氯盐及不含氯盐混凝土浆体的水化进程研究[J].广西大学学报(自然科学版),2011,36(4):683-688.
[8]施惠生,王琼.掺复合胶凝材料混凝土的抗氯离子侵蚀性能[J].同济大学学报(自然科学版),2004,32(4):490-493.
[9]李永强,巴明芳,柳俊哲,等.干湿循环作用下水泥基复合材料抗氯离子侵蚀性能及其微观结构变化[J].复合材料学报,2017,34(12):2856-2865.
[10]JIANG L,NIU D T.Study of deterioration of concrete exposed to different types of sulfate solutions under drying-wetting cycles[J].Construction and Building Materials,2016,117:88-98.
[11]王旭,黄小青,江英.掺硫酸渣粉水泥砂浆的抗硫酸盐侵蚀性能[J].广西科技大学学报,2018,29(2):97-102.
[12]张椿民,连金明,刘锋.再生粗骨料混凝土钢筋锈蚀试验研究[J].广西科技大学学报,2016,27(3):76-81.
[13]袁小亚,曾俊杰,肖桂兰.氧化石墨烯与石墨烯复掺对水泥砂浆力学性能及耐硫酸盐腐蚀性能研究[J/OL].重庆交通大学学报(自然科学版),(2018-11-16)[2018-12-03].http://kns.cnki.net/kcms/detail/50.1190.U.20181116.1000.014.html.
[14]薛立强.氧化石墨烯对隧道衬砌混凝土性能的影响[J].科学技术与工程,2017,17(22):124-128.
[15]杨雅玲,袁小亚,沈旭,等.氧化石墨烯改性水泥砂浆耐腐蚀性能的研究[J].功能材料,2017,48(5):5144-5148.