Experimental Observing Damage Evolution in Cement Pastes Exposed to External Sulfate Attack by in situ X-ray Computed Tomography

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外文摘要：The paper presents experimental investigation results of crack pattern change in cement pastes caused by external sulfate attack(ESA).To visualize the formation and development of cracks in cement pastes under ESA,an X-ray computed tomography(X-ray CT)was used,i e,the tomography system of Zeiss Xradia 510 versa.The results indicate that X-CT can monitor the development process and distribution characteristics of the internal cracks of cement pastes under ESA with attack time.In addition,the C3A content in the cement significantly affects the damage mode of cement paste specimens during sulfate erosion.The damage of ordinary Portland cement(OPC)pastes subjected to sulfate attack with high C3A content are severe,while the damage of sulfate resistant Portland cement(SRPC)pastes is much smaller than that of OPC pastes.Furthermore,a quadratic function describes the correlation between the crack volume fraction and development depth for two cement pastes immermed in sulfate solution.

外文关键词：

concreteexternal sulfate attackdamage evolutionsitu X-ray computed tomography

作者：

WU Min、CAO Kailei、XIAO Weirong、YU Zetai、CAO Jierong、DING Qingjun、LI Jinhui

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作者单位：

China Railway Construction Corporation Harbour and Channel Engineering Bureau Group Co.,LTD,Zhuhai 519000,China

Con-struction Headquarters of Zhoushan Liuheng Bridge Phase II Project,Zhoushan 316000,China

China Railway Construction Bridge En-gineering Bureau Group Co.,LTD,Tianjin 300000,China

State Key Laboratory of Silicate Material for Architecture(Wuhan University of Technology),Wuhan 430070,China

College of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,China

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出版年：

2025

DOI：

10.1007/s11595-025-3050-7

武汉理工大学学报(材料科学版)(英文版)

武汉理工大学

武汉理工大学学报(材料科学版)(英文版)

影响因子：0.253

ISSN：1000-2413

年,卷(期)：2025.40(1)