Electrically cured ultra-high performance concrete (UHPC) embedded with carbon nanotubes for field casting and crack sensing

Jung, Myungjun; Park, Jiseul; Hong, Seong Hyeon; Moon, Juhyuk

doi:10.1016/j.matdes.2020.109127

Cited by 57 publications

(30 citation statements)

References 52 publications

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“…It is quite interesting to mention that a few attempts were made to migrate self-sensing capability of UHPC from laboratory to filed applications. Different from previous mentioned studies, Jung et al (2020) added CNTs to UHPC to take advantage of the significantly decreased electrical resistivity of UHPC/CNT composites so as to achieve effective electrical curing at low voltage. A multi-wall CNT was added to the UHPC mixture at 1.2 wt% of total binder content, which was close to the calculated percolation threshold.…”

Section: Self-sensing Capability Of Uhpcmentioning

confidence: 99%

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Review of Self-sensing Capability of Ultra-high Performance Concrete

Lian

et al. 2021

Front. Mater.

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Ultra-high performance concrete (UHPC) has the inherent potential to self-sensing capability due to its inclusion of steel fibers or other electrically conductive materials. Many studies have investigated the electrical and piezoresistive properties of UHPC. With the incorporation of micro steel fibers, carbon nanotubes, carbon nanofibrils, or nano graphite platelets, it opens up great potential to allow UHPC to effectively sense stress, strain, and crack damage. Therefore, the UHPC-based structures can achieve the functionality of structure health monitoring (SHM). This article reviews the recent advances in self-sensing capability of various UHPC-based materials with the focus on sensing capability and mechanisms. Future applications and challenges are also discussed.

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Section: Self-sensing Capability Of Uhpcmentioning

confidence: 99%

“…Although concrete with self-sensing capability has been around for almost three decades, and there are already reports of selfsensing UHPC applications (Jung et al, 2020;Le et al, 2021a;Kim et al, 2021), the further development and applications still face several critical challenges:…”

Section: Future Challengesmentioning

confidence: 99%

Review of Self-sensing Capability of Ultra-high Performance Concrete

Lian

et al. 2021

Front. Mater.

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“…Cementitious strain sensors, using piezoresistive principle, attract major attention among researchers [ 51 , 52 , 63 , 64 , 69 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 ]. The main research scope of this kind of sensors is strain sensing for maintaining existing structures, especially critical infrastructure or historical objects.…”

Section: Applications Of Cementitious Nanocompositesmentioning

confidence: 99%

“…Jung et al [ 82 ] investigated possibilities of field casting ultra-high performance concrete (UHPC) with the addition of CNTs and steel fibers. Results of electrical tests showed a 10-times higher gauge factor of UHPC with steel fibers and CNTs than UHPC containing just steel fibers.…”

Section: Applications Of Cementitious Nanocompositesmentioning

confidence: 99%

Recent Advancements in Carbon Nano-Infused Cementitious Composites

2021

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A rising demand for efficient functional materials brings forth research challenges regarding improvements in existing materials. Carbon infused cementitious composites, regardless of being an important research topic worldwide, still present many questions concerning their functionality and properties. The paper aims to highlight the most important materials used for cementitious composites, their properties, and their uses while also including the most relevant of the latest research in that area.

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“…Existing studies mentioned in the literature [17] include the feasibility of EC application [18,19], field application [20], electrodes arrangement [21], curing regime [22,23], effects of hydration process and microstructure [24,25], mineral admixtures [26], durability [16,27] etc. The current mainstream research direction mainly uses Joule heating to solve the problem of winter construction at ultra-low temperatures [28][29][30][31], repair and reinforcement of building structures [32], strengthening concrete [33][34][35]. These studies proved that EC has the following advantages: shortening the maintenance time, improving the early mechanical properties of cement, wide application prospects, low energy consumption, while the disadvantages also include thermal damage to specimens caused by high temperature, pore coarsening, and long-term performance degradation.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Mechanical Properties and Microstructure of Cement-Based Materials by Direct Electric Curing and Steam Curing

Yang¹,

He²,

Wang³

et al. 2021

Preprint

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Direct electric curing (EC) is a new green curing method for cement-based materials that improves the early mechanical properties via the uniform high temperature produced by Joule heating. To understand the effects of EC and steam curing (SC) on the mechanical properties and microstructure of cement-based materials, the mortar was cured at different temperature-controlled curing regimes (40°C, 60°C and 80°C). Meanwhile, mechanical properties, hydrate phase and pore structure of specimens were investigated. The energy consumption of two curing methods was compared and analyzed. The results show that the EC specimens have better and more stable growth of mechanical strength. The pore structure of EC specimen is also better than that of SC specimen at different maintenance ages. However, the hydration degree and products of samples cured by EC are similar to that SC samples. The energy consumption of EC is lower than SC. This study provides an important technical support for the EC in the production of energy-saving and high early-strength concrete precast components.

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Electrically cured ultra-high performance concrete (UHPC) embedded with carbon nanotubes for field casting and crack sensing

Cited by 57 publications

References 52 publications

Review of Self-sensing Capability of Ultra-high Performance Concrete

Review of Self-sensing Capability of Ultra-high Performance Concrete

Recent Advancements in Carbon Nano-Infused Cementitious Composites

A Comparative Study on the Mechanical Properties and Microstructure of Cement-Based Materials by Direct Electric Curing and Steam Curing

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