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曾东灵1  ,  徐陈明2  ,  胡    俊2  ,  熊   辉2 ,  王志鑫1  ,  杨勇昌1

( 1 .  海南水文地质工程地质勘察院 ，海口 570206 ;  2.  海南大学 土木建筑工程学院 ，海口 570228)

摘   要 ：为探讨纳米二氧化锆  ( ZrO2  )   掺量对于水泥钙质砂力学性能的影响 ，配制了不同比例的纳米 ZrO2  - 水泥钙质砂试样 ，并通过无侧限抗压试验评估其力学特性。结果表明： 纳米 ZrO2   - 水泥钙质砂的应力 -  应变曲线呈现软化型驼峰状曲线 ，且残余应力最终趋于稳定值。掺入纳米 ZrO2  后 ，试样在 7 、14 和 28 d 龄期的 无侧限抗压强度分别提高了 101 . 1% 、105. 6% 和 91 . 6% 。此外 ，纳米 ZrO2   - 水泥钙质砂的抗压强度受龄期的影 响程度高于水泥钙质砂 ；纳米 ZrO2   的加入显著提升了试样的变形模量 ，增强了其抗变形能力。研究成果可为岛 礁建设工程提供技术参考。

关键词：钙质砂 ；纳米 ZrO2 ;  水泥 ；应力偏差系数法 ；力学特性

中图分类号：TU43            文献标志码：A           

文章编号： 1005- 8249   (2025)  03- 0013- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .003

ZENG Dongling1  ,  XU Chenming2 ,  HU Jun2 ,  XIONG Hui2 ,  WANG Zhixin1  ,  YANG Yongchang1

           ( 1 . Hainan Hydrogeology and Engineering Geology Survey Institute ,  Haikou 570206 ,  China; 

2. College of Civil Engineering and Architecture ,  Hainan University ,  Haikou 570228 ,  China)

Abstract: To investigate the influence of nano zirconium dioxide (ZrO₂) dosage on the mechanical performance of cement-stabilized calcareous sand, this study prepared specimens of calcareous sand modified with varying proportions of nano ZrO₂ and evaluated their behavior using unconfined compressive strength tests. The results show that the stress–strain curves of the nano ZrO₂–cement calcareous sand exhibit a softening, hump-shaped profile, with residual stresses ultimately stabilizing at a constant level. Incorporation of nano ZrO₂ led to increases in unconfined compressive strength of 101.1%, 105.6%, and 91.6% at curing ages of 7, 14, and 28 d, respectively. Moreover, the compressive strength of the nano ZrO₂–cement calcareous sand demonstrated greater sensitivity to curing age compared to plain cement calcareous sand. The addition of nano ZrO₂ also significantly enhanced the deformation modulus of the specimens, improving their resistance to deformation. These findings provide valuable technical guidance for the application of modified calcareous sand in island and reef construction projects.

Key words: calcareous sand; zirconium dioxide nanoparticles; cement; stress deviation coefficient method; mechanical properties.

基金项目：海南省科技厅自然科学基金创新研究团队项目  (522CXTD51 1 ) ;  海南省海洋地质资源与环境重点实验室 自主课题 (22 - HNHYDZZYHJZZ005) ;  海南大学横向课题  (HD - KYH - 2022383) 。

作者简介： 曾东灵  (1968—) ,  男 ，本科 ，高级工程师 ，研究方向：岩土工程设计与施工。

通信作者：熊   辉  (1995—) ,   男 ，硕士 ，研究方向：岩土工程。 收稿日期：2023 - 1 1 - 01