Effect of Seawater on Hydration of Calcium Aluminate Cement with Different Mineral Compositions

被引：0
|
作者：
Wang Z. [1 ,2 ]
Peng X. [1 ]
Zhao Y. [1 ]
Xu L. [1 ,2 ]
Diao G. [3 ]
Liu G. [3 ]
机构：
[1] School of Materials Science and Engineering, Tongji University, Shanghai
[2] Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Shanghai
[3] China Building Materials Academy, Beijing
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 08期
关键词：
Calcium aluminatecement; Calcium monoaluminate/calcium dialuminateratio; Monocalcium aluminate decahydrate; Seawater; Strength;
D O I：
10.14062/j.issn.0454-5648.20190848
中图分类号：
学科分类号：
摘要：
Calcium aluminate cement (CAC) has a superior resistance to seawater erosion. In order to further develop the application potential of CAC in marine environment, theeffect of seawater on the hydration of CAC with different calcium monoaluminate/calcium dialuminate (CA/CA2) ratios was investigated. The results show that in the early hydration stage, seawater retards the hydration of CAC, and the lower the CA/CA2 ratio is, the more significant the retarding would be. In the late hydration stage, seawater promotes the hydration of CAC, and the amount of monocalcium aluminate decahydrate (CAH10) in the paste increases and the pore structure optimizes, resulting in a prominent increase in the CAC strength, compared to that mixed with tap water. Moreover, a lower CA/CA2 ratio leads to a more improvement of the CAC strength. However, compared to tap water, the compressive strength of CAC strength decreases in the late stage when the CAC is mixed with seawater. Regardless of mixing with tap water or seawater, CAH10is the main hydration product of CAC, and chloride ions are mainly bound by the physical adsorption. No hydration products related to sulfate andmagnesium attack appear. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1240 / 1248
页数：8
相关论文
共 33 条
  • [1] HEKAL E E, KISHAR E, MOSTAFA H., Magnesium sulfate attack on hardened blended cement pastes under different circumstances, CemConcr Res, 32, pp. 1421-1427, (2002)
  • [2] MAES M, DE BELIE N., Resistance of concrete and mortar against combined attack of chloride and sodium sulphate, CemConcr Compos, 53, pp. 59-72, (2014)
  • [3] YAMINI O A, KAVIANPOUR M R, MOUSAVI S H., Experimental investigation of parameters affecting the stability of articulated concrete block mattress under wave attack, Appl Ocean Res, 64, pp. 184-202, (2017)
  • [4] SHI Jinjie, SUN Wei, J Chin Ceram Soc, 38, 9, pp. 1753-1764, (2010)
  • [5] SONG HA-Won, SHIM Hyun-Bo, PETCHERDCHOO Aruz, Et al., Service life prediction of repaired concrete structures under chloride environment using finite difference method, CemConcr Compos, 31, pp. 120-127, (2009)
  • [6] GOWRIPALAN N, MOHAMED H M., Chloride-ion induced corrosion of galvanized and ordinary steel reinforcement in high-performance concrete, Cem Concr Res, 28, 8, pp. 1119-1131, (1998)
  • [7] ANN K Y, KIM T S, KIM J H, Et al., The resistance of high alumina cement against corrosion of steel in concrete, Constr Build Mater, 24, 8, pp. 1502-1510, (2010)
  • [8] JIN S H, YANG H J, HWANG J P, Et al., Corrosion behaviour of steel in CAC-mixed concrete containing different concentrations of chloride, Constr Build Mater, 110, pp. 227-234, (2016)
  • [9] MACIAS A, KINDNESS A, GLASSER F P., Corrosion behavior of steel in high alumina cement mortar cured at 5, 25 and 55℃: Chemical and physical factors, J Mater Sci, 31, 9, pp. 2279-2289, (1996)
  • [10] WANG Z P, ZHAO Y T, YANG H Y, Et al., Influence of NaCl on the hydration of calcium aluminate cement constantly cured at 5, 20 and 40°C, Adv Cem Res, pp. 1-36, (2019)
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