含晶态外加剂（CA）水泥基材料自愈性能的研究进展

IF 7.4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of building engineering Pub Date : 2025-10-03 DOI:10.1016/j.jobe.2025.114265

Jiatai Zhou , Jihui Zhao , Zhendong Yao , Shuang Geng , Mo Zhang , Jiaping Li , Zhong Li , Wanxing Deng , Junhui Huang , Kunrun Wu , Feipeng Mei

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引用次数: 0

摘要

晶体外加剂（CA）作为一种高性能的水泥基自愈材料，可以在结构发生微裂纹时激活自愈功能。这一特性不仅有效延长了建筑物的使用寿命，而且显著提高了建筑物的抗渗防水性能，在提高土木工程耐久性领域具有很大的应用价值。然而，在不同的研究中，CA的化学成分存在很大的差异，导致愈合机制和修复结果受多种因素的影响而不一致。CA绩效的标准化评估框架尚未建立。本文系统综述了近年来水泥基材料中CA自愈性能的研究进展，重点分析了各种CA产品的活性成分及其相应的自愈机制。它还阐明了有关CA与C3S或CH之间反应途径的争议。该综述还概述了CA对机械和耐久性性能的影响：低剂量CA通常支持强度增加并显着提高耐久性。系统地评价了影响自愈效率的关键因素，包括固化环境、开裂年龄、矿物添加量和高吸水性聚合物（SAP）。结果表明，与淡水相比，饱和Ca(OH)2溶液和海水具有更好的愈合性能。自愈效果随开裂年龄的增加而下降。矿物掺合料增强后期愈合，其中矿渣表现出特别有益的效果。SAP不仅可以提高愈合效率，还可以与CA协同作用，实现宏观裂缝的快速完全闭合。鉴于评估协议缺乏共识，本工作还评估了当前自愈评估方法的适用性和局限性，为支持CA技术的可靠工程应用提供了见解。

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Research advances on self-healing properties of cement-based materials containing crystalline admixtures (CA): A systematic review

Crystalline admixtures (CA), as a high-performance cement-based self-healing material, can activate the healing function when microcracks occur in structures. This characteristic not only effectively extends the service life of buildings but also significantly enhances their impermeability and waterproofing performance, making it of great application value in the field of improving the durability of civil engineering. However, substantial variations exist in the chemical composition of CA across studies, leading to inconsistent healing mechanisms and repair outcomes influenced by multiple factors. A standardized evaluation framework for CA performance has yet to be established. This paper provides a systematic review of recent advances in the self-healing performance of CA in cement-based materials, with a focus on analyzing the active components of various CA products and their corresponding healing mechanisms. It also elucidates controversies regarding the reaction pathways between CA and C₃S or CH. The review also outlines the effects of CA on mechanical and durability properties: low dosage CA generally supports strength gain and markedly improves durability. Critical factors influencing self-healing efficiency, including curing environment, cracking age, mineral additions, and superabsorbent polymers (SAP), are systematically evaluated. Findings indicate superior healing performance in saturated Ca(OH)₂ solution and seawater compared to freshwater. Self-healing efficacy declines with increased cracking age. Mineral admixtures enhance later-stage healing, with slag showing particularly beneficial effects. SAP not only improves healing efficiency but also acts synergistically with CA to enable rapid and complete closure of macroscopic cracks. Given the absence of a consensus in evaluation protocols, this work also assesses the applicability and limitations of current self-healing assessment methods, providing insights to support reliable engineering application of CA technology.

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来源期刊

Journal of building engineering Engineering-Civil and Structural Engineering

CiteScore

10.00

自引率

12.50%

发文量

1901

审稿时长

35 days

期刊介绍： The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.