氧化石墨烯改性滨海水泥土的静动力学性能及微观机理

doi:10.3785/j.issn.1008-973X.2026.04.014

浙江大学学报(工学版)

2026, Vol. 60

Issue (4): 822-832 DOI: 10.3785/j.issn.1008-973X.2026.04.014

土木工程、交通工程

氧化石墨烯改性滨海水泥土的静动力学性能及微观机理

王伟1(

),吴鸿祥1,封天洪1,李娜1,姜屏1,*(

),梅国雄2

1. 绍兴文理学院土木工程学院，浙江绍兴 312000
2. 浙江大学海洋学院，浙江舟山 316021

Static dynamic properties and micro-mechanisms of graphene oxide-modified coastal cement soils

Wei WANG1(

),Hongxiang WU1,Tianhong FENG1,Na LI1,Ping JIANG1,*(

),Guoxiong MEI2

1. School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
2. Ocean College, Zhejiang University, Zhoushan 316021, China

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摘要：

为了探究氧化石墨烯(GO)对水泥土静、动力学性能的改性效果及微观机理，通过无侧限抗压试验和动三轴试验测量氧化石墨烯改性水泥土(GOCS)的无侧限抗压强度、弹性模量、累计塑性应变、动弹性模量和阻尼比，并通过SEM、XRD和BET测试探究GOCS的微观表征、物相组成和孔隙结构. 试验结果表明：1）随着GO质量分数的增加，GOCS的无侧限抗压强度和弹性模量逐渐增大，当GO质量分数为0.05%时达到最大值. 2）随着围压的上升，GOCS的累积应变和动弹性模量逐渐增大，阻尼比逐渐减小. 3）随着GO质量分数的增加，GOCS的累计应变和阻尼比逐渐减小，动弹性模量逐渐增大. 4）建立2个数学模型分别表征围压、GO质量分数和累计应变，以及GO质量分数、静弹性模量和动弹性模量之间的关系，结果显示拟合值与实测值的误差均小于5%，预测模型具有一定的可靠性. 5）GO的掺入能够降低GOCS内CH晶体的取向指数，使其内部结构变得更加密实. 本研究结果为GO在软土地基加固工程的应用提供了一定的技术参考.

关键词： 氧化石墨烯; 滨海水泥土; 无侧限抗压强度; 动三轴试验; 微观结构

Abstract:

In order to investigate the modification effect and micro-mechanism of graphene oxide (GO) on the static and dynamic properties of cement soil, the unconfined compressive strength, modulus of elasticity, cumulative plastic strain, dynamic modulus of elasticity, and damping ratio of graphene oxide-modified cement soil (GOCS) were measured by unconfined compression tests and dynamic triaxial tests, and the microscopic characterization, phase composition, and pore structure of GOCS were explored via SEM, XRD, and BET tests. The test results showed that 1) The unconfined compressive strength and modulus of elasticity of GOCS gradually increased with the increase of GO mass fraction and reached the maximum value when the GO mass fraction was 0.05%. 2) As the confining pressure increased, the cumulative strain and dynamic elastic modulus of GOCS gradually increased, and the damping ratio gradually decreased. 3) With the increase of GO mass fraction, the cumulative strain and damping ratio of GOCS gradually decreased, and the dynamic elastic modulus gradually increased. 4) Two mathematical models were established to characterize the relationship between confining pressure, GO mass fraction, and cumulative strain as well as between GO mass fraction, static elastic modulus, and dynamic elastic modulus, and the results showed that the errors between the fitted values and the measured values were within 5%, and the prediction models had certain reliability. 5) The incorporation of GO could reduce the orientation index of CH crystals within GOCS and make its internal structure denser. The results provided some technical references for the application of GO in soft ground reinforcement engineering.

Key words: graphene oxide coastal cement soil unconfined compressive strength dynamic triaxial test microstructure

收稿日期: 2025-04-29 出版日期: 2026-03-19

CLC:

TU 447

基金资助: 国家自然科学基金资助项目(52179107).

通讯作者: 姜屏 E-mail: wellswang@usx.edu.cn;jiangping@usx.edu.cn

作者简介: 王伟（1977—），男，教授，博士，从事软土地基加固研究. orcid.org/0000-0002-7231-6675. E-mail：wellswang@usx.edu.cn

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引用本文:

王伟,吴鸿祥,封天洪,李娜,姜屏,梅国雄. 氧化石墨烯改性滨海水泥土的静动力学性能及微观机理[J]. 浙江大学学报(工学版), 2026, 60(4): 822-832.

Wei WANG,Hongxiang WU,Tianhong FENG,Na LI,Ping JIANG,Guoxiong MEI. Static dynamic properties and micro-mechanisms of graphene oxide-modified coastal cement soils. Journal of ZheJiang University (Engineering Science), 2026, 60(4): 822-832.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2026.04.014 或 https://www.zjujournals.com/eng/CN/Y2026/V60/I4/822

图 1 试验材料的实物图

表 1 滨海软土的基本性质

表 2 试验材料的化学成分表

表 3 试验配合比表

图 2 试样制备流程图

图 3 不同养护龄期和GO质量分数下GOCS的应力-应变曲线

表 4 不同养护龄期和GO质量分数下GOCS的E50

图 4 不同养护龄期和GO质量分数下GOCS的$\varepsilon _{1{\mathrm{p}}} $

图 5 不同养护龄期和GO质量分数下GOCS的$\varepsilon $1p3000

图 6 养护3 d和7 d时GOCS的$\varepsilon_{1{\mathrm{p}}3000} $拟合图

图 7 养护28 d时GOCS的$\varepsilon_{1{\mathrm{p}}3000} $拟合图及误差范围

图 8 不同养护龄期和GO质量分数下GOCS的Ed

图 9 不同养护龄期和GO质量分数下GOCS的Ed3000

图 10 围压为50、100 kPa时Ed3000的拟合图

图 11 围压为200 kPa时Ed3000的拟合图及误差范围

图 12 不同养护龄期和GO质量分数下GOCS的λ3000

图 13 养护龄期为28 d时GOCS的SEM图像

图 14 养护龄期为28 d时GOCS的XRD图像

表 5 GOCS试样的CH晶体取向指数

图 15 养护龄期为28 d时GOCS的BET图像

图 16 GOCS中不同种类孔隙占比图

图 17 GO在GOCS中的改性机理图

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