微波养护对水泥砂浆性能与微观结构的影响

刘伊迪, 孙明刚, 王立峰, 李双欣, 李旭森, 凌民海, 杨英姿

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森林工程 ›› 2025, Vol. 41 ›› Issue (03) : 614-628. DOI: 10.7525/j.issn.1006-8023.2025.03.018
道路与交通

微波养护对水泥砂浆性能与微观结构的影响

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Effect of Microwave Curing on Properties and Microstructure of Cement Mortar

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摘要

混凝土微波养护技术可以显著提高混凝土早期强度，但微波养护制度没有统一的设计标准，导致养护后材料性能呈现较大差异。为探究微波养护制度的影响，采用响应面法系统分析微波养护参数对水泥砂浆抗压强度的影响规律。建立关键微波养护参数与材料性能之间的关系模型，确定加热温度控制在40 ℃以下、加热功率为1 000 W、加热时间为 30 min为最佳微波养护制度。通过运用X射线衍射（XRD）、压汞法（MIP）以及扫描电子显微镜（SEM）等测试方法，分析微波养护对水泥材料化学成分及微观结构的影响，揭示合理的微波养护制度能够促进砂浆的水化程度并形成更加致密的结构。通过计算机模拟对微波养护过程中的温度变化进行分析，发现微波养护温度具有热点效应。进一步得出微波养护温度是影响砂浆强度最关键的影响因素。

Abstract

Microwave curing technology of concrete can significantly improve the early strength of concrete， but there is no uniform design standard for microwave curing method， resulting in great differences in material properties after curing. To explore the influence of microwave curing methods， this study employed the response surface methodology to systematically analyze the influence of microwave curing method on the compressive strength of cement mortar. The relationship model between key microwave curing parameters and material properties was established， and the optimal microwave curing method was determined when the heating temperature was under 40℃ and the heating power was 1 000 W for 30 min. Chemical components and microstructure impacts were studied using X-ray diffraction （XRD）， mercury intrusion porosimetry （MIP）， and scanning electron microscope （SEM）， and it was revealed that a reasonable microwave curing method can promote the hydration degree of mortar and form a denser structure. The temperature variation in microwave curing process was analyzed by combining experimental data and computer simulation， and it was found that microwave curing temperature had hot spot effect. It is concluded that microwave curing temperature is the most important factor affecting the strength of mortar.

关键词

响应面法 / 微波养护 / 砂浆 / 抗压强度 / 微观结构

Key words

Response surface methodology / microwave curing / mortar / compressive strength / microstructure

中图分类号

TU528

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刘伊迪 , 孙明刚 , 王立峰 , 等. 微波养护对水泥砂浆性能与微观结构的影响. 森林工程. 2025, 41(03): 614-628 https://doi.org/10.7525/j.issn.1006-8023.2025.03.018
LIU Yidi, SUN Minggang, WANG Lifeng, et al. Effect of Microwave Curing on Properties and Microstructure of Cement Mortar[J]. Forest Engineering. 2025, 41(03): 614-628 https://doi.org/10.7525/j.issn.1006-8023.2025.03.018

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基金

国家自然科学基金青年科学基金项目(52108193)
黑龙江省重点研发计划(JD22A012)
龙建路桥股份有限公司科技项目(230000100004258230003)

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