微波养护对水泥砂浆性能与微观结构的影响
2025-06-13刘伊迪孙明刚王立峰李双欣李旭森凌民海杨英姿

























中图分类号:TU528 文献标识码:A DOI: 10.7525/j.issn.1006-8023.2025.03.018
Abstract: Microwavecuring technology ofconcretecansignificantly improve theearly strength ofconcrete,butthere is no uniform design standard for microwavecuring method,resulting ingreat diffrences in material properties after curing.To explore the influence of microwave curing methods,this study employed the response surface methodology to systematicallyanalyze theinfluenceof microwavecuring methodon the compressivestrength ofcement mortar.Therelationship model between key microwave curing parameters and material properties was established,andthe optimal microwave curing method was determined when the heating temperature was under
and the heating power was 1 Ooo W for 30 min.Chemical components and microstructure impacts were studied using X-ray diffaction (XRD),mercury intrusion porosimetry(MIP),and scaning electron microscope(SEM),and it was revealed thatareasonable microwave curing methodcan promote thehydration degreeof mortarand form adenser structure.The temperature variation in microwavecuring processwas analyzed bycombining experimentaldataand computer simulation,and it was found that microwavecuring temperature hadhotspot efect.Itisconcluded that microwave curing temperature is the most important factor affecting the strength of mortar.
Keywords:Response surface methodology;microwave curing;mortar; compressive strength;microstructure
0 引言
《2023年排放差距报告》显示,2022年温室气体排放量和大气中二氧化碳浓度创历史新高,建筑行业作为主要来源,排放占比达 3 3 % ,预计2050年将超
。混凝土行业因此成为“碳减排\"策略研究的重点领域。在建筑行业碳排放问题日益严峻的背景下,快速养护技术凭借其在提升混凝土早期强度和施工效率方面的显著优势,成为研究重点之一。混凝土快速养护技术能够显著促进混凝土的水化反应,有效提升混凝土的早期强度,进而实现施工效率的大幅提高[3]。微波养护技术作为一种新兴的混凝土快速养护技术,相较于蒸汽养护技术能够在更短的养护周期内显著提升混凝土的早期强度,并且具有更低的能耗[4]。此技术不仅与当前可持续建筑实践的核心理念相契合,而且在减少碳排放方面也展现出了显著成效,因此该技术被视为一种极具潜力且拥有广阔应用前景的混凝土快速养护技术。
微波是一种频率在 3 0 0 M H z~3 0 0 G H z 的电磁波,当微波作用于材料时,吸波材料吸收电磁能并将其转化为热能,从而实现对材料的加热[5]。与从外部热源向内传导的常规加热方式不同,微波加热不受外部热源对被加热材料的热传导、辐射或对流的限制,加热效果更加快速均匀[],并能有效降低加热过程中的能耗。有研究表明,微波加热 1 m i n 就可达到常规加热1 2 0 m i n 的效果[7]。当微波作用于混凝土时,水泥、水和骨料等混凝土的主要成分均属于能够吸收电磁波的介电材料,同时微波辐照会引发分子间的振动。……
