Evaluation of self-healing of internal cracks in biomimetic mortar using coda wave interferometry

Liu, Shukui; Bundur, Zeynep Basaran; Zhu, Jinying; Ferron, Raissa Douglas

doi:10.1016/j.cemconres.2016.01.006

Cited by 65 publications

(29 citation statements)

References 33 publications

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“…Novel monitoring techniques were also introduced to further enhance the efficiency of bacterial-based self-healing system. Liu et al employed coda wave interferometry to evaluate and quantify the degree of self-healing induced by the formation of CaCO 3 in a non-destructive way (Liu et al, 2016).…”

Section: Bacteria-based Approachmentioning

confidence: 99%

Bioinspired Cementitious Materials: Main Strategies, Progress, and Applications

Shahsavari

Hwang

2020

Front. Mater.

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Nature-inspired ensemble of organic and inorganic constituents, such as that found in the microstructure of nacre and dactyl clubs of Mantis shrimp, has evolved into the model system for the structural design of industrial composites. This novel design concept, which helps attaining the balance between strength, toughness and ductility, has not only induced a paradigm shift in the synthesis of advanced materials such as graphene-based composites but also, in the development of more abundant, low-cost materials such as cement and concretes. The advance in synthetic techniques and the advent of new manufacturing technologies such as 3D printing has enabled effective integration of cementitious materials with soft materials across various length scales. Furthermore, novel functional properties such as self-healing have also been materialized based on a variety of strategies. This review will provide the comprehensive overview on the ongoing research efforts, encompassing 3D printing, self-healing strategies and integration of C-S-H with organic components, all of which are actively exploited in synthesizing bioinspired, multifunctional cementitious materials.

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Section: Bacteria-based Approachmentioning

confidence: 99%

Bioinspired Cementitious Materials: Main Strategies, Progress, and Applications

Shahsavari

Hwang

2020

Front. Mater.

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“…From a broad viewpoint, nondestructive methods developed for the evaluation of the damage condition of concrete to date include visual and optical inspections and stress-wave based methods, as well as nuclear, magnetic, and electronic methods [ 3 ]. Of these methods, ultrasonic techniques involve measurements of pulse velocity [ 9 , 10 , 11 ], characteristics of guided waves [ 12 ], surface-wave transmission [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], acoustic emission [ 5 ], diffuse ultrasound [ 25 , 26 , 27 , 28 ], coda wave interferometry [ 28 , 29 ], and nonlinear ultrasound [ 30 , 31 ]. Each of the ultrasonic techniques makes use of different characteristics of ultrasound to detect the location and propagation of cracks, to estimate the width and/or depth of cracks, or to evaluate the durability and residual mechanical properties of concrete [ 32 ].…”

Section: Motivations and Objectivesmentioning

confidence: 99%

Surface-Wave Based Model for Estimation of Discontinuity Depth in Concrete

Ahn

Kim

Sim

et al. 2018

Sensors

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In this paper, we propose an accurate and practical model for the estimation of surface-breaking discontinuity (i.e., crack) depth in concrete through quantitative characterization of surface-wave transmission across the discontinuity. The effects of three different mixture types (mortar, normal strength concrete, and high strength concrete) and four different simulated crack depths on surface-wave transmission were examined through experiments carried out on lab-scale concrete specimens. The crack depth estimation model is based on a surface-wave spectral energy approach that is capable of taking into account a wide range of wave frequencies. The accuracy of the proposed crack depth estimation model is validated by root mean square error analysis of data from repeated spectral energy transmission ratio measurements for each specimen.

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“…A simple approach by means of limiting the labor work in processing is adding the vegetative bacterial cells directly to the mix Previously, Bundur et al (2017) showed that vegetative S. pasteurii cells could survive in mortar up to 11 months when they were added to the mix without any encapsulations. These remaining cells were found to be effective in remediation of the microstructure when internal microcracks (Liu et al 2016) and flexural surface cracks in 7 day old samples (Amiri et al 2018). However, limited viability and lack of O2 decreased the performance of CaCO3 yield through all crack the depth.…”

Section: Introductionmentioning

confidence: 97%

Two-Part Bio-Based Self-Healing Repair Agent for Cement-Based Mortar

Tezer¹,

Bundur²

2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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Factors affecting durability of concrete structures are generally associated with each other. Due to its brittle nature, concrete can crack under stress and these cracks are one of the main reasons for a decrease in service life in concrete structures. Therefore, it is crucial to detect and recover microcracks, then to repair them as they were developed to wider cracks. Recent research in the field of concrete materials suggested that it might be possible to develop a smart cement-based material that is capable of remediate cracks by triggering biogenic calcium carbonate (CaCO3) precipitaton. This paper summarizes a study undertaken to investigate the self-healing efficiency of Sporosarcina pasteurii (S. pasteurii) cells immobilized on both diatomaceous earth and pumice, to remediate flexural cracks on mortar in early ages (28 days after mixing). To obtain a two-phase bio additive, half of the minerals were saturated with a nutrient medium consisting of urea, corn-steep liqueur(CSL) and calcium acetate and the cells with immobilized to the other half without nutrients. Screening of the healing process was done with ultrasonic pulse velocity (UPV) testing and stereomicroscopy. With this approach, the cracks on mortar surface were sealed and the water absorption capacity of the so-called self-healed mortar decreased compared to its counterpart cracked mortar samples.

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Evaluation of self-healing of internal cracks in biomimetic mortar using coda wave interferometry

Cited by 65 publications

References 33 publications

Bioinspired Cementitious Materials: Main Strategies, Progress, and Applications

Bioinspired Cementitious Materials: Main Strategies, Progress, and Applications

Surface-Wave Based Model for Estimation of Discontinuity Depth in Concrete

Two-Part Bio-Based Self-Healing Repair Agent for Cement-Based Mortar

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