玄武岩纤维水泥土的抗渗性能研究

1)福建江夏学院工程学院,福建福州 350108; 2)福州大学环境与资源学院,福建福州350116; 3)福建省建筑设计研究院有限公司,福建福州 350001

岩土工程; 水泥土; 玄武岩纤维; 抗渗性能; 渗透性试验; 电通量; 微观结构

Impermeability of basalt fiber soil-cement
CHEN Feng1, 2, TONG Shenghao2, REN Jianhua3, and JIAN Wenbin2

1)College of Engineering, Fujian Jiangxia University, Fuzhou 350108, Fujian Province, P.R.China2)College of Environment and Resources, Fuzhou University, Fuzhou 350116, Fujian Province, P.R.China3)Fujian Provincial Institute of Architectural Design and Research Co. Ltd., Fuzhou 350001, Fujian Province, P.R.China

geotechnical engineering; soil-cement; basalt fiber; impermeability; permeability test; electric flux; microstructure

DOI: 10.3724/SP.J.1249.2021.02157

备注

为分析玄武岩纤维对水泥土抗渗性能的影响,在水泥土中掺入质量分数分别为0、0.5%、1.0%和1.5%的玄武岩纤维,通过渗透性试验和抗氯离子渗透性试验得到玄武岩纤维水泥土的渗透系数和电通量值,获得最优的玄武岩纤维掺量值. 试验结果表明,掺入玄武岩纤维对水泥土的抗渗性能有较明显的增强作用,随着掺量增多,水泥土的渗透系数和电通量值都会降低,但降幅随着掺量的增加呈减小趋势,玄武岩纤维的最优质量分数为1.5%.结合扫描电镜测试,发现玄武岩纤维的掺入能有效联结土颗粒,使纤维、土颗粒和水泥形成一个更稳定的整体.

The influence of basalt fiber on the impermeability of soil-cement is studied by the tests of permeability, anti-chloride ion resistance and scanning electron microscope. The mixing basalt fiber mass fractions for different tests are 0, 0.5%, 1.0%, and 1.5%, respectively. The permeability coefficients and electric fluxes of basalt fiber soil-cements are obtained. Results show that the addition of basalt fiber can obviously enhance the impermeability of soil-cement. With the increase of basalt fiber content, both the permeability coefficient and the value of electric flux decrease. The optimal mass fraction of basalt fiber is 1.5%. The incorporation of basalt fibers can effectively connect the discrete soil particles and make the basalt fibers, soil particles and cement form a more stable whole.

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