Degradation of Pore Structure and Microstructures in Hardened Cement Paste Subjected to Flexural Loading and Wet-dry Cycles in Sea Water

武汉理工大学学报-材料科学版(英文版), 2009, 24(6): 940-944. doi: 10.1007/s11595-006-6940-1

^1, , ^2, , ^3, , ^4,

1.School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

2.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

3.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

4.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

基金项目: the China National Natural Science Foundation(50808045) Founded by the Western traffic Project under the Ministry of Communi-cations of China(200631822302-03)

Degradation of Pore Structure and Microstructures in Hardened Cement Paste Subjected to Flexural Loading and Wet-dry Cycles in Sea Water

ZHANG Wuman ^1, , SUN Wei ^2, , ZHANG Yunsheng ^3, , CHEN Huisu ^4,

1.School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

2.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

3.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

4.Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China

Keywords： hardened cement paste

Hardened cement paste was subjected to the flexural loading and wet-dry cycles in sea water.The degradation of microstructures was obtained using scanning electron microscope(SEM),and the energy dispersive spectrum(EDS)analysis was carried to analyze the local composition.Mercury intrusion porosimetry(Poremaster GT-60)was used to analyze the degradation of pore structures.The experimental results show that the synergistic action of the flexural loading,wet-dry cycles and sea water leads to significant deterioration of hardened cement paste.The degradation of microstructures in the tensile region is more serious than that in the compressive region.The flexural loading and wet-dry cycles accelerate the chemical attack of sea water.

参考文献

[1]	张亦涛,方永浩,郑波.荷载与其它因素共同作用下混凝土耐久性研究进展[J].材料导报,2003(09):48-50.
[2]	W.Sun;Y.M.Zhang .Damage and damage resistance of high strength concrete under the action of load and freeze-thaw cycles[J].Cement and Concrete Research,1999(6):1519-1523.
[3]	Wei Sun;Ru Mu;Xin Luo .Effect of chloride salt, freeze-thaw cycling and externally applied load on the performance of the concrete[J].Cement and Concrete Research,2002(12):1859-1864.
[4]	余红发,慕儒,孙伟,缪昌文.弯曲荷载、化学腐蚀和碳化作用及其复合对混凝土抗冻性的影响[J].硅酸盐学报,2005(04):492-499.
[5]	Sanchun Yoon;Kejin Wang;W. Jason Weiss .Interaction between Loading, Corrosion, and Serviceability of Reinforced Concrete[J].ACI materials journal,2000(6):637-644.
[6]	Harvey Haynes;Robert Q'Neill;Michael Nett;P. Kumar Mehta .Salt Weathering Distress on Concrete Exposed to Sodium Sulfate Environment[J].ACI materials journal,2008(1):35-43.
[7]	Manu Santhanam;Menashi D. Cohen;Jan Olek .Mechanism of sulfate attack: A fresh look[J].Cement and Concrete Research,2002(6):915-921.
[8]	Khandaker M. Anwar Hossain .Performance of Volcanic Ash Based Precast and In Situ Blended Cement Concretes in Marine Environment[J].Journal of Materials in Civil Engineering,2005(6):694-702.

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材料期刊网

Degradation of Pore Structure and Microstructures in Hardened Cement Paste Subjected to Flexural Loading and Wet-dry Cycles in Sea Water

参考文献