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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (4): 1132-1141.DOI: 10.16552/j.cnki.issn1001-1625.2025.0931

• 水泥混凝土 • 上一篇    下一篇

自然风化作用下碳化养护水泥基材料的力学性能劣化机制

杨雪滢1,2(), 王开元1,2, 王耀城1,2, 占宝剑1,2(), 邢锋3   

  1. 1.深圳大学土木与交通工程学院,深圳 518060
    2.深圳大学广东省滨海土木工程耐久性重点实验室,深圳 518060
    3.暨南大学力学与建筑工程学院,广州 510632
  • 收稿日期:2025-09-17 修订日期:2025-11-24 出版日期:2026-04-20 发布日期:2026-05-14
  • 通信作者: 占宝剑,博士,副教授。E-mail:zhanbj@szu.edu.cn
  • 作者简介:杨雪滢(2000—),女,硕士研究生。主要从事水泥基材料碳化方面的研究。E-mail:1244711958@qq.com
  • 基金资助:
    国家自然科学基金面上项目(52178235);深圳市科技计划项目(KCXST20221021111205012)

Mechanisms of Mechanical Property Degradation of Carbonation Curing Cement-Based Materials under Natural Weathering

YANG Xueying1,2(), WANG Kaiyuan1,2, WANG Yaocheng1,2, ZHAN Baojian1,2(), XING Feng3   

  1. 1.College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China
    2.Guangdong Province Key Laboratory of Durability for Marine Civil Engineering,Shenzhen University,Shenzhen 518060,China
    3.School of Mechanics and Construction Engineering,Jinan University,Guangzhou 510632,China
  • Received:2025-09-17 Revised:2025-11-24 Published:2026-04-20 Online:2026-05-14

摘要:

碳化养护可在早期加速水泥基材料强度发展并吸收二氧化碳,但对水泥基材料在服役期间的力学性能劣化机制尚不明确。本研究以水泥浆体试样为对象,将其暴露于自然环境中,开展不同风化作用时间(30、60、90 d)下碳化养护与常规水养护对比试验,系统分析了试样在风化作用下的物相组成、孔隙结构、宏观及微观力学性能变化规律。研究表明:因碳化养护过程中样品形成致密碳酸盐层,与常规水养护样品相比,碳化养护0.5 h与1 d的样品在风化作用下后期(90 d)的抗压强度分别提高15.1%与34.7%,平均显微硬度分别提高1.4%与3.6%;随着碳化养护时间延长,水泥浆体表面压痕模量显著增加。碳化养护对增强水泥基材料的抗风化性能具有显著效果,为碳化养护技术在水泥基材料领域的应用提供了重要依据,并为滨海地区早期碳化养护制品应用研究提供一定的参考价值。

关键词: 水泥基材料, 碳化养护, 风化作用, 力学性能, 纳米压痕模量

Abstract:

Carbonation curing can accelerate the early strength development of cement-based materials while sequestering carbon dioxide. However, the degradation mechanisms affecting their mechanical properties during service life remain unclear. This study exposed cement paste specimens to natural environmental conditions to investigate the effect of carbonation curing compared to conventional water curing under different weathering durations (30, 60, and 90 d). The composition, pore structure, and both macroscopic and microscale mechanical properties of the weathered specimens were systematically analyzed. The results indicate that, in the later stage (90 d) of weathering, specimens carbonation curing for 0.5 h and 1 d show 15.1% and 34.7% higher compressive strength, and 1.4% and 3.6% higher average microhardness, respectively, than the conventional water curing specimens. This improvement is attributed to the formation of a dense carbonate layer in sample during carbonation curing. Moreover, with extended carbonation duration, the nanoindentation modulus at the specimen surface increases significantly. These findings demonstrate that carbonation curing significantly enhances the weathering resistance of cement-based materials, providing an important basis for its application in this field and a useful reference for the deployment of early-age carbonation curing products in coastal regions.

Key words: cement-based material, carbonation curing, weathering, mechanical property, nanoindentation modulus

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