自愈裂缝修补棒对增强混凝土耐久性、密封性和刚度恢复的评价

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-07-08 DOI:10.1016/j.dibe.2025.100712

Didier Snoeck , Nele De Belie

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引用次数: 0

摘要

为了促进自体愈合，提出了一种涉及使用裂缝修复棒的新方法。这种棒含有水泥、结晶外加剂（CA）、膨胀剂（EA）和高吸水性聚合物（SAP）的混合物，适用于开裂的混凝土表面。施加湿/干养护期，通过重复拉伸试验，通过透水性和愈合来评估裂缝密封效率。对外加剂的掺量进行了调整，并对裂缝修补棒的实际应用进行了评价。高压条件下的抗渗透性得到了恢复，水流减少了102倍。由于自愈合，机械性能也部分恢复，甚至高达100%。有或没有EA的CA被证明是最有前途的选择。外加剂与水化产物和裂缝中的水分发生反应，形成额外的晶体，物理地密封已形成的裂缝。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Evaluation of self-healing crack repair sticks for enhanced durability, sealing, and stiffness recovery of concrete

To promote autogenous healing, a new approach involving the use of a crack repair stick is proposed. The sticks contain mixtures based on cement, crystalline admixtures (CA), expansive agents (EA) and superabsorbent polymers (SAP) and are applied to a cracked concrete surface. A wet/dry curing period was imposed, and crack sealing efficiency was assessed using water permeability and healing by means of repeated tensile tests. The quantity of admixtures was varied and the practical application of the crack repair sticks was assessed. A regain in impermeability under high-pressure conditions was found, showing a reduced water flow by up to a factor of 10². Mechanical properties also partially recovered, even up to 100 %, due to autogenous healing. CA with or without EA proved to be the most promising option. The admixtures react with hydration products and moisture in the crack to form additional crystals, physically sealing the formed crack.

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.