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自修复系统中水泥基体与碱性硅酸盐溶液相互作用的超声监测

Ultrasonic Monitoring of the Interaction between Cement Matrix and Alkaline Silicate Solution in Self-Healing Systems.

作者信息

Ait Ouarabi Mohand, Antonaci Paola, Boubenider Fouad, Gliozzi Antonio S, Scalerandi Marco

机构信息

Department of Applied Science and Technology, Condensed Matter and Complex Systems Physics Institute, Politecnico di Torino, 10129 Torino, Italy.

Laboratoire de Physique des Matériaux, Université des Sciences et de la Technologie Houari Boumediene, BP 32 El Alia, Bab Ezzouar 16111, Algeria.

出版信息

Materials (Basel). 2017 Jan 7;10(1):46. doi: 10.3390/ma10010046.

DOI:10.3390/ma10010046
PMID:28772405
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5344599/
Abstract

Alkaline solutions, such as sodium, potassium or lithium silicates, appear to be very promising as healing agents for the development of encapsulated self-healing concretes. However, the evolution of their mechanical and acoustic properties in time has not yet been completely clarified, especially regarding their behavior and related kinetics when they are used in the form of a thin layer in contact with a hardened cement matrix. This study aims to monitor, using linear and nonlinear ultrasonic methods, the evolution of a sodium silicate solution interacting with a cement matrix in the presence of localized cracks. The ultrasonic inspection via linear methods revealed that an almost complete recovery of the elastic and acoustic properties occurred within a few days of healing. The nonlinear ultrasonic measurements contributed to provide further insight into the kinetics of the recovery due to the presence of the healing agent. A good regain of mechanical performance was ascertained through flexural tests at the end of the healing process, confirming the suitability of sodium silicate as a healing agent for self-healing cementitious systems.

摘要

碱性溶液，如硅酸钠、硅酸钾或硅酸锂，作为用于开发胶囊封装自愈合混凝土的愈合剂似乎非常有前景。然而，它们的力学和声学性能随时间的演变尚未完全阐明，特别是当它们以薄层形式与硬化水泥基体接触时的行为及其相关动力学。本研究旨在使用线性和非线性超声方法监测在存在局部裂缝的情况下硅酸钠溶液与水泥基体相互作用的演变。通过线性方法进行的超声检测表明，在愈合的几天内，弹性和声学性能几乎完全恢复。非线性超声测量有助于进一步深入了解由于愈合剂的存在而导致的恢复动力学。在愈合过程结束时通过弯曲试验确定了力学性能的良好恢复，证实了硅酸钠作为自愈合水泥基体系愈合剂的适用性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/8bf3e6a1b081/materials-10-00046-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/8bf3e6a1b081/materials-10-00046-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/9c5054253d73/materials-10-00046-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/7f63a411296d/materials-10-00046-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/0a77212aa531/materials-10-00046-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/735117d67806/materials-10-00046-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/a84fd7eb58ea/materials-10-00046-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/686a54db3542/materials-10-00046-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/c113715f0f20/materials-10-00046-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/99ae25294f07/materials-10-00046-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/10e97894733a/materials-10-00046-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c1b9/5344599/8bf3e6a1b081/materials-10-00046-g012.jpg

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