徐彬彬,欧忠文,罗伟,刘娜,袁旺,付来平
XU Bin-bin,OU Zhong-wen,LUO Wei,LIU Na,YUAN Wang,FU Lai-ping

• 1:中国人民解放军陆军勤务学院军事设施系
• 2:四川轻化工大学材料科学与工程学院

摘要(Abstract)：

测试了海水干湿循环下玄武岩纤维增强珊瑚混凝土(BFRCC)的质量和强度变化,并分析了基体的水化产物和微观结构,研究了BFRCC的耐久性。结果表明:随着侵蚀次数的增加,各BFRCC质量都逐渐增大,而抗压强度则呈现先增长后降低的趋势;同时在不同干湿循环次数下,掺入1%BF的BFRCC试样质量和强度变化幅度最小,这说明1%体积分数的BF可显著提高基体的耐久性;热重分析与扫描电镜分析得出,基体性能的变化主要是外界侵蚀离子在内部形成C-S-H、AFt和Ca(OH)_2等产物。
Durability of basalt fiber reinforced coral concrete(BFRCC) is investigated by testing the change of mass and compressive strength and analysing the hydration products and microstructure of matrix under seawater and drying-wetting cycles. The results show that with increase of drying-wetting cycles, mass of all matrix increase and compressive strength increase first and then decrease. Simultaneously, the BFRCC smaple with 1%BF exhibites the smallest change in mass and strength under different drying-wetting cycles, indicating dosage of 1% BF can significantly improve the durability of the matrix. TGA and SEM analysis indicate that the changes of properties are attributed to the fact that erosion ion in seawater result in hydration products in internal matrix such as C—S—H, Aft and Ca(OH)2.

关键词(KeyWords)： 玄武岩纤维;珊瑚混凝土;海水干湿循环;耐久性
basalt fiber;coral concrete;seawater drying-wetting cycle;durability

Abstract:

Keywords:

基金项目(Foundation): 军队后勤科研计划项目(BLJ17J008)

作者(Author): 徐彬彬,欧忠文,罗伟,刘娜,袁旺,付来平
XU Bin-bin,OU Zhong-wen,LUO Wei,LIU Na,YUAN Wang,FU Lai-ping

DOI: 10.16090/j.cnki.hcxw.2020.03.006

参考文献(References)：

• [1]WANG Q,LI P,TIAN Y,et al.Mechanical properties and microstructure of Portland cement concrete prepared with coral reef sand[J].Journal of Wuhan University of Technology-Mater.Sci.Ed.,2016,31(5):996-1001.
• [2]王爱国,吕邦成,刘开伟,等.珊瑚骨料混凝土性能及微结构的研究进展[J].材料导报,2018,32(9):1528-1533.
• [3]NIU D,SU L,LUO Y,et al.Experimental study on mechanical properties and durability of basalt fiber reinforced coral aggregate concrete[J].Construction and Building Materials,2020,237:117628.
• [4]SANTHANAM M,COHEN M,OLEK J.Differentiating seawater and groundwater sulfate attack in Portland cement mortars[J].Cement and Concrete Research,2006,36(12):2132-2137.
• [5]CHENG S,SHUI Z,SUN T,et al.Effects of fly ash,blast furnace slag and metakaolin on mechanical properties and durability of coral sand concrete[J].Applied Clay Science,2017,141:111-117.
• [6]TANG J,CHENG H,ZHANG Q,et al.Development of properties and microstructure of concrete with coral reef sand under sulphate attack and drying-wetting cycles[J].Construction and Building Materials,2018,165:647-654.