Electro-thermal properties and Seebeck effect of conductive mortar and its use in self-heating and self-sensing system

Wang, Ziyi; Wang, Zhi; Ning, Mei; Tang, Shengxuan; He, Yunfei

doi:10.1016/j.ceramint.2017.03.202

Cited by 25 publications

(6 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper compared the physical and mechanical properties of fiber soil in the literature [15][16][17] to analyze the frost heave protection and performance analysis of the roadbed slope fill sample.…”

Section: Analysis Of Protection Against Frost Heave Of Slope Filling ...mentioning

confidence: 99%

“…According to [17], combined with the data obtained from the field slope protection test of the Datong-Xi'an high-speed railway section, the test set the sample of the specialshaped fiber soil [15][16][17], the buried length was 16 cm, the moisture content was 12%, and the compaction degree was 96%, the pores between the special-shaped fiber soil sample and the slope protection soil gradually decreased, and the mutual wrapping and gripping effect were gradually enhanced, and the shear strength was better.…”

Section: Performance Analysis Of Slope Filling Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Model and performance analysis of coupled heat and moisture transfer of the roadbed slope

et al. 2022

View full text Add to dashboard Cite

The soil samples of the roadbed slope of the Datong-Xi'an high-speed railway section are taken as the research object. The frost-heave property of the fiber soil of the roadbed slope under a single freeze-thaw cycle is studied, where the fiber's content is taken into account. The distributions of temperature and humidity fields inside the slope are numerically studied, and the coupling transfer of heat and moisture is revealed. The results are helpful for the optimal design of the roadbed slope

show abstract

Section: Analysis Of Protection Against Frost Heave Of Slope Filling ...mentioning

confidence: 99%

Section: Performance Analysis Of Slope Filling Samplesmentioning

confidence: 99%

Model and performance analysis of coupled heat and moisture transfer of the roadbed slope

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In their work, the harvested energy per square meter of cement‐based composite material reached up to 8.4 × 10 −6 J, while the surface temperature of cement‐based materials maintained at 68°C and the thermal energy radiation exceeds 420 minutes 3 . Wang et al held that cement‐based composites can be used as an indoor heating material, because it has peculiarities of low electrical resistivity and excellent thermal stability 10 . Sang et al studied a reinforce sulphoaluminate cement‐based thermal energy storage composite (STESC), which has thermal energy storage/release performance for improving reproducible energy utilization and indoor thermal comfort of solar buildings 11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…3 Wang et al held that cement-based composites can be used as an indoor heating material, because it has peculiarities of low electrical resistivity and excellent thermal stability. 10 Sang et al studied a reinforce sulphoaluminate cement-based thermal energy storage composite (STESC), which has thermal energy storage/release performance for improving reproducible energy utilization and indoor thermal comfort of solar buildings. 11,12 Therefore, EG-CFRC has wide application field and a good prospect in energy harvesting, but these applications are restrained by its low energy conversing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of porosity and crack on the thermoelectric properties of expanded graphite/carbon fiber reinforced cement‐based composites

Jian

Wang

et al. 2020

Int J Energy Res

View full text Add to dashboard Cite

Summary Cement‐based composites is a promising type of structural material, which has prospective applications in relieving the urban heat island effect in summer and melted snow with low energy consumption. However, the major drawbacks of cement‐based composites are heterogeneity, porosity, and brittleness. Porosity and microcrack have considerable influence on the thermoelectric of cement‐based composites applied in large‐scale concrete structures in future. This paper studied in detail the effect of porosity and crack on thermoelectric properties of the cement‐based composite. The proper pores and cracks in the cement matrix are advantageous to enhance the Seebeck effect, but meanwhile it also reduces the electrical conductivity. So combined with Seebeck effect, electrical conductivity and other factors, it can obtain a comparatively low electrical conductivity (0.063S cm−1) of expanded graphite/carbon fiber reinforced cement‐based composites (EG‐CFRC), but EG‐CFRC manifests the maximum thermoelectric figure of merit (ZT) has reached 2.22 × 10−7 when the porosity is 3.90%. With different porosity, the Seebeck effect of prepared EG‐CFRC was strengthened when the crack existed. The effect is most pronounced by a factor of 2 when the porosity is 28.90%. Therefore, based on stabilizing the conductivity, the crack is fittingly made to have a good effect on the Seebeck coefficient.

show abstract

“…Therefore, it is necessary to introduce effective conductive additives into the cement matrix in order to reduce the resistivity of cement composites. Conductive additives such as carbon fibers, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] carbon nanotubes, 16,17 steel fibers, 10,[18][19][20] graphite, 10,[21][22][23] metal particles, 24,25 and hybrid addition [26][27][28][29] have been used in cement composites as resistance heating elements. Suitable electrical conductivity is attained when the volume of the conducting additive exceeds the percolation threshold, i.e.…”

Section: Introductionmentioning

confidence: 99%

Cement composites with expanded graphite as resistance heating elements

Frąc

Pichór

Szołdra

2020

Journal of Composite Materials

View full text Add to dashboard Cite

The following paper presents the results of research on cement composites with expanded graphite as resistance heating elements. Samples of cement mortar were prepared with expanded graphite obtained from intercalated graphite by means of rapid heating at 1000℃. Monotonic and cyclic self-heating tests of cement composites with differing contents of expanded graphite were conducted. In the monotonic self-heating test, the electrical current and the surface temperature of the cement composites with expanded graphite were measured at temperatures 23℃ and –10℃ in order to evaluate their capacity to generate heat. The maximum temperature of composites, the time required to raise the temperature by 10℃, and the power density were determined. Five cycles were applied in the cyclic self-heating test to investigate heat-dependent mechanical properties. The results of the research revealed that cement composites with expanded graphite exhibited promising properties for application as resistance heating elements.

show abstract

Electro-thermal properties and Seebeck effect of conductive mortar and its use in self-heating and self-sensing system

Cited by 25 publications

References 21 publications

Model and performance analysis of coupled heat and moisture transfer of the roadbed slope

Model and performance analysis of coupled heat and moisture transfer of the roadbed slope

Effect of porosity and crack on the thermoelectric properties of expanded graphite/carbon fiber reinforced cement‐based composites

Cement composites with expanded graphite as resistance heating elements

Contact Info

Product

Resources

About