Effect of Nano-Calcium Carbonate on Chloride Ion Binding Amount of Cement Stone

Abstract

Abstract: The conversion of free chloride ions into bound chloride ions in the concrete pore solution can effectively reduce the corrosion of reinforcing steel in reinforced concrete structures in coastal and salt lake areas.The effect of nano-calcium carbonate on chloride ions binding amount of cement stone was investigated. Potentiometric titration was used to determine the content of bound chloride ions, and the chloride ion binding capacity of cement stone was analyzed by plotting the fitted relationship curve between bound and free chloride ions according to chloride ion isothermal adsorption theory. The chloride ion binding mechanism of cement stone was analyzed by XRD and thermogravimetry analysis. The results show that the admixture of nano-calcium carbonate increases the chloride ion binding amount of cement stone, and the total bound chloride ions content is the largest when its admixture reaches 3% (mass fraction). With the increase of chloride ion concentration, the chloride ion binding amount of nano-calcium carbonate doped cement stone increases accordingly. The admixture of nano-calcium carbonate could accelerate the hydration of cement and promote the generation of C-S-H gel and Friedel's salt, which is beneficial to the chloride ion physical adsorption and chemical binding of cement stone.

Key words: bound chloride ion, free chloride ion, nano-calcium carbonate, cement stone, isothermal adsorption theory of chloride ion, corrosion

CLC Number:

TU528.01

CHEN Xinjie, DING Tianyun, ZHANG Haisheng, LUO Jie, ZHENG Bo, CHU Hongqiang, JIANG Linhua. Effect of Nano-Calcium Carbonate on Chloride Ion Binding Amount of Cement Stone[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1869-1878.

References

[1] 高宗军,李怀岭,李华民.河砂资源过度开采对水环境的破坏暨环境地质问题:以山东大汶河河砂开采为例[J].中国地质灾害与防治学报,2003,14(3):96-99.
GAO Z J, LI H L, LI H M. The negative effects on water environment and environ-geological problems from excessive exploitation of river sand resources[J]. The Chinese Journal of Geological Hazard and Control, 2003, 14(3): 96-99 (in Chinese).
[2] 文自桢,马少立,段平.纳米碳酸钙的合成、改性以及应用进展[J].江西建材,2021(8):2-4+6.
WEN Z Z, MA S L, DUAN P. Synthesis, modification and application progress of nanometer calcium carbonate[J]. Jiangxi Building Materials, 2021(8): 2-4+6 (in Chinese).
[3] 莫利伟.混凝土中固化态氯离子失稳特性的研究[D].宁波:宁波大学,2014.
MO L W. Reseach of the instability features of the binded chloride ions in concrete[D]. Ningbo: Ningbo University, 2014 (in Chinese).
[4] TANG L P, NILSSON L O. Chloride binding capacity and binding isotherms of OPC pastes and mortars[J]. Cement and Concrete Research, 1993, 23(2): 247-253.
[5] MEHTA P K. Effect of cement composition on corrosion of reinforcing steel in concrete[C]. Third International Symposium on Corrosion of Reinforcement in Concrete Construciton, 1990.
[6] HUSSIAN S E, ALSAADOUN S. Effect of tricalcium aluminate content of cement on chloride binding corrosion of reinforcing steel in concrete[J]. ACI Materials Journal, 1993, 89(1): 3-12.
[7] BEN-YAIR M. The effect of chlorides on concrete in hot and arid regions[J]. Cement and Concrete Research, 1974, 4(3): 405-416.
[8] CSIZMADIA J, BALÁZS G, TAMÁS F D. Chloride ion binding capacity of aluminoferrites[J]. Cement and Concrete Research, 2001, 31(4): 577-588.
[9] DHIR R K, EL-MOHR M A K, DYER T D. Chloride binding in GGBS concrete[J]. Cement and Concrete Research, 1996, 26(12): 1767-1773.
[10] 李固华,高波.纳米CaCO₃对砼耐干湿循环腐蚀性能的影响[J].重庆交通学院学报,2007,26(2):131-135.
LI G H, GAO B. Effect of NM level CaCO₃ on performance of the concrete in drying-wetting cycle in corrosive environments[J]. Journal of Chongqing Jiaotong University, 2007, 26(2): 131-135 (in Chinese).
[11] LIU X Y, CHEN L, LIU A H, et al. Effect of nano-CaCO₃ on properties of cement paste[J]. Energy Procedia, 2012, 16: 991-996.
[12] SATO T, BEAUDOIN J J. Effect of nano-CaCO₃ on hydration of cement containing supplementary cementitious materials[J]. Advances in Cement Research, 2011, 23(1): 33-43.
[13] 魏荟荟.纳米CaCO₃对水泥基材料的影响及作用机理研究[D].哈尔滨:哈尔滨工业大学,2013.
WEI H H. Study on effect and mechanism of nano-CaCO₃ in cement-based materials[D]. Harbin: Harbin Institute of Technology, 2013 (in Chinese).
[14] 李秋超,范颖芳.几种纳米水泥砂浆氯离子渗透性对比试验研究[J].混凝土,2021(2):96-100+105.
LI Q C, FANG Y F. Comparative experimental study of chloride ion permeability of several nano-cement mortars[J]. Concrete, 2021(2): 96-100+105 (in Chinese).
[15] GAO W, DING L L, ZHU Y C. Effect of surface modification on the dispersion, thermal stability and crystallization properties of PET/CaCO₃ nanocomposites[J]. Tenside Surfactants Detergents, 2017, 54(3): 230-237.
[16] 史建明.纳米碳酸钙的分散和聚合物包覆[D].杭州:浙江大学,2005.
SHI J M. Dispersion and encapsulation of nanometer calcium carbonate with polymer[D]. Hangzhou: Zhejiang University, 2005 (in Chinese).
[17] DOUSTI A, BEAUDOIN J J, SHEKARCHI M. Chloride binding in hydrated MK, SF and natural zeolite-lime mixtures[J]. Construction and Building Materials, 2017, 154: 1035-1047.
[18] ZIBARA H, HOOTON R D, THOMAS M D A, et al. Influence of the C/S and C/A ratios of hydration products on the chloride ion binding capacity of lime-SF and lime-MK mixtures[J]. Cement and Concrete Research, 2008, 38(3): 422-426.
[19] THOMAS M D A, HOOTON R D, SCOTT A, et al. The effect of supplementary cementitious materials on chloride binding in hardened cement paste[J]. Cement and Concrete Research, 2012, 42(1): 1-7.
[20] 黎均权.超低水胶比水泥基材料中氯离子迁移及其结合规律的研究[D].长沙:湖南大学,2019.
LI J Q. Study of chloride migration and chloride binding isotherms in cement-based materials with ultra-low water to binder ratio[D]. Changsha: Hunan University, 2019 (in Chinese).
[21] 罗睿,蔡跃波,王昌义.磨细矿渣净浆和砂浆结合外渗氯离子的性能[J].建筑材料学报,2001,4(2):148-153.
LUO R, CAI Y B, WANG C Y. Binding capability of chloride ions in mortar and paste with ground granulated blast furnace slag[J]. Journal of Building Materials, 2001, 4(2): 148-153 (in Chinese).
[22] 翁智财,余红发,孙伟,等.水灰比与水泥用量对混凝土Cl^-结合能力的影响[J].武汉理工大学学报,2006,28(3):47-50.
WENG Z C, YU H F, SUN W, et al. Influence of water-cement ratio and cement content on chloride binding capacity of concrete[J]. Journal of Wuhan University of Technology, 2006, 28(3): 47-50 (in Chinese).
[23] DHIR R K, EL-MOHR M A K, DYER T D. Developing chloride resisting concrete using PFA[J]. Cement and Concrete Research, 1997, 27(11): 1633-1639.
[24] ZIBARA H. Binding of external chloride by cement pastes[D]. Toronto University of Toronto, 2001.
[25] 谢友均,陈书苹,龙广成.改善水泥浆体结合氯离子性能的试验研究[J].铁道科学与工程学报,2007,4(2):1-5.
XIE Y J, CHEN S P, LONG G C. Experimental study on improvement of chloride ion binding of cement paste[J]. Journal of Railway Science and Engineering, 2007, 4(2): 1-5 (in Chinese).
[26] ELAKNESWARAN Y, NAWA T, KURUMISAWA K. Electrokinetic potential of hydrated cement in relation to adsorption of chlorides[J]. Cement and Concrete Research, 2009, 39(4): 340-344.
[27] TUUTTI K. Analysis of pore solution squeezed out of cement paste and mortar[J]. Nordic Concrete Research, 1983, 1: 16.
[28] MARTÍN-PÉREZ B, ZIBARA H, HOOTON R D, et al. A study of the effect of chloride binding on service life predictions[J]. Cement and Concrete Research, 2000, 30(8): 1215-1223.
[29] 王子玮.活性粉末混凝土抗氯离子侵蚀渗透性能研究[D].北京:北京交通大学,2011.
WANG Z W. Study on anti-chloride ion penetration of RPC[D]. Beijing: Beijing Jiaotong University, 2011 (in Chinese).
[30] 余红发.盐湖地区高性能混凝土的耐久性、机理与使用寿命预测方法[D].南京:东南大学,2004.
YU H F. Study on high performance concrete in salt lake: durability, mechanism and service life prediction[D]. Nanjing: Southeast University, 2004 (in Chinese).
[31] MENG T, YU Y, WANG Z J. Effect of nano-CaCO₃ slurry on the mechanical properties and micro-structure of concrete with and without fly ash[J]. Composites Part B: Engineering, 2017, 117: 124-129.
[32] NILSSON L, MASSAT M, TANG L. Effect of non-linear chloride binding on the prediction of chloride penetration into concrete structures[J]. Special Publication, 1994, 145: 469-486.
[33] 王一木.混凝土氯离子吸附问题及寿命预测研究[D].哈尔滨:哈尔滨工程大学,2017.
WANG Y M. Research on chloride binding problem and life prediction of concrete[D]. Harbin: Harbin Engineering University, 2017 (in Chinese).
[34] 钱匡亮,张津践,钱晓倩,等.纳米CaCO₃中间体对水泥基材料性能的影响[J].材料科学与工程学报,2011,29(5):692-697.
QIAN K L, ZHANG J J, QIAN X Q, et al. Effects of nano-CaCO₃ intermediate on physical and mechanical properties of cement-based materials[J]. Journal of Materials Science and Engineering, 2011, 29(5): 692-697 (in Chinese).
[35] 孟涛,钱匡亮,钱晓倩,等.纳米碳酸钙颗粒对水泥水化性能和界面性质的影响[J].稀有金属材料与工程,2008,37(s2):667-669.
MENG T, QIAN K L, QIAN X Q, et al. Effect of the nano-CaCO₃ on hydrated properties and interface of cement paste[J]. Rare Metal Materials and Engineering, 2008, 37(s2): 667-669 (in Chinese).
[36] MONTEIRO P J M, WANG K, SPOSITO G, et al. Influence of mineral admixtures on the alkali-aggregate reaction[J]. Cement and Concrete Research, 1997, 27(12): 1899-1909.