Snow Melting Performance of Graphene Composite Conductive Concrete in Severe Cold Environment

Wang, Xinjie; Wu, Yongkang; zhu, pinghua; Tao, Ning

doi:10.3390/ma14216715

Cited by 16 publications

(9 citation statements)

References 29 publications

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“…Other researches [28,38,45] have confirmed that the origin of electrically conductive additives has a different impact on electrical properties of mineral composites.…”

Section: -391 the Study Of The Properties Of Nanomaterialsmentioning

confidence: 94%

“…The impact of different man-made materials with electrically conductive particles on mineral matrices have been esteemed for the following materials: carbon black [28], asphaltene [35], steel shaving [34], slag [37], industrial carbon [42], fly ash [38], powdered coke [43], carbon-contained slag from aluminum production [2]. All that researches have provided enough data to make a conclusion that the impact of morphology, size of particles and distribution on structure formation is much more significant than the role of the content.…”

Section: -391 the Study Of The Properties Of Nanomaterialsmentioning

confidence: 99%

“…Studies in the field of activation of this binder have shown that the following three types of activation are the most effective: mechanical, chemical, and mechanical-chemical [24][25][26]. From the point of view of technological requirements, in the production of structural building materials, the method of chemical activation is the most promising [27][28][29]. The addition of alkali metals (Na 2 SO 4 , К 2 SO 4 , CuSO 4 , MgSO 4 , FeSO 4 , BaSO 4 ) as chemical catalysts for hardening the sulfates accelerates the setting time of the fluoranhydrite binder by increasing the solubility of calcium sulfate.…”

Section: Introductionmentioning

confidence: 99%

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Carbon-containing modifier for fluoranhydrite binder

Gordina¹,

Gumenyuk²,

Polyanskikh³

et al. 2022

Nanobuild

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Introduction.In order to widen the functionality of construction and building materials and widespread electrically conductive building constructions, it is highly recommended to reduce cost of the solutions. This can be achieved by replacing binders with the industrial by-products. At the same time, there are a few articles about adjustment of electrically conductive properties of materials based on by-product binders and this field is of a great importance. Also, highly dispersed particles in modifiers and their role might be considered as important to find out, especially when such additives are used to improve structure and properties of composites. Methods and materials. To study the possibility of controlling the electrical properties of the matrix, compositions based on fluoroanhydrite, sodium sulfate as a hardening activator, and UPC-MIX-1 suspension as an electrically conductive additive, were made. The effect of UPC-MIX-1 suspension on the electrical performance and structure formation of a mineral matrix containing dispersed carbon black particles was studied. The polydisperse nature of the modifying additive and the ratio of the nanodispersed and microdispersed parts of the solid phase were determined. Indicators for calculating the specific volumetric electrical resistance were determined by the probe method. The influence of the dispersed additive on the characteristics of the fluoroanhydrite composite was evaluated by standard laboratory methods. Features of structure formation were evaluated using the methods of physicochemical analysis. Results and discussion. It was confirmed that a fluoranhydrite-based mineral binder with sodium sulfate has moderate physical mechanical properties and might be used as a substitute for gypsum binder. The usage of an electrically conductive additive as a modifier enhances such mechanical properties as flexural compressive strength and compressive strength which increase by 51% and 65% correspondingly. Also, hydro physical properties have been improved, for instance the coefficient of softening for the FD-4 sample has increased by 39%, and the water absorption by mass for the same sample has decreased by 36%. Specific volume electrical resistance has decreased by 49-52% and equals13,6 kOm • cm, 8% of electrically conductive additive being added. The physical and technical properties of the presented composite are due to significant changes of the physical and chemical properties including the features of structure formation. Conclusions. The obtained compositions require extra optimization in order to be used as a heating component. At the same time, the achieved electrical conductivity is sufficient to level the electrostatic effect of self-leveling floors. Regularities in the formation of the structure of the fluoroanhydrite composite have been established, which manifest themselves in the formation of a larger number of contacts for the intergrowth of crystalline hydrate new formations ensured by the presence of a nanodispersed part in the modifying additive.

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“…Other researches [28,38,45] have confirmed that the origin of electrically conductive additives has a different impact on electrical properties of mineral composites.…”

Section: -391 the Study Of The Properties Of Nanomaterialsmentioning

confidence: 94%

Section: -391 the Study Of The Properties Of Nanomaterialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon-containing modifier for fluoranhydrite binder

Gordina¹,

Gumenyuk²,

Polyanskikh³

et al. 2022

Nanobuild

View full text Add to dashboard Cite

show abstract

“…At present, deicing technologies include conductive concrete [ 1 , 2 , 3 ], circulating heating systems [ 4 , 5 , 6 ], electric cable heating [ 7 ], solar energy [ 8 ], geothermal systems [ 9 , 10 ], induction heating, microwave heating [ 11 ], etc. Compared with the above deicing technologies, self-ice-melting asphalt pavements with salt-storage additives have the advantages of relatively low cost and easy construction.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

Zhang

Guo

2022

Materials

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Based on laboratory tests, the objective of this study is to assess long-term road performance and to predict deicing longevity of self-ice-melting asphalt pavements containing salt-storage materials. Dry–wet cycles and freeze–thaw cycles were used to treat the specimens at different durations. The long-term road performance of self-ice-melting asphalt mixtures was evaluated by freeze–thaw splitting tests, high-temperature rutting tests, and low-temperature beam bending tests. In addition, the influences of coefficients of void ratio, temperature, vehicle load, crack, and Mafilon (MFL) content on salt precipitation were quantified by conductivity tests, and single consumption of snow and ice melt was quantified by total dissolved solids (TDS) tests. The results show that the long-term water stability, long-term high-temperature stability, and long-term low-temperature crack resistance of self-ice-melting asphalt pavements tended to decrease as the number of dry–wet cycles and freeze–thaw cycles increased. Freeze–thaw cycles exerted deeper influences on the deterioration of road performance than dry–wet cycles, especially on water stability. With increased void ratio and temperature, salt precipitation was accelerated by 1.1 times and 1.5~1.8 times, respectively. Under vehicle loads and cracks, salt precipitation was accelerated by 1.5 times and 1.65 times, respectively. With decreased MFL content, salt precipitation slowed down by 0.54 times. Finally, based on the proportion of each factor relative to the whole life cycle of the pavement, a dicing longevity prediction model was established considering the above factors.

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“…Materials with good conductivity, such as steel fiber [16,17], carbon fiber [18,19], erosion wire [20], steel shaving [16], graphite powder [13,21], carbon nanotube [22], carbon black [20] and graphene [23] can be used to increase the electrical conductivity of cementitious materials. Fig.…”

Section: Introductionmentioning

confidence: 99%

Effects of single-walled carbon nanotubes and steel fiber on recycled ferrochrome filled electrical conductive mortars

Dehghanpour¹,

Doğan

Subaşı

et al. 2022

Journal of Sustainable Construction Materials and Technologies

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The production of electrically conductive concrete was introduced years ago among construction materials, generally for anti-icing. The present study investigates the electrical, mechanical, dynamic, and microstructural properties of recycled ferrochrome filled cementitious mortars, containing single-walled carbon nanotubes (SWCNTs) and steel fiber. 7, 14, and 28-day non-destructive and 28-day compressive and bending tests of cementitious conductive mortars obtained from five different mixtures were performed. Two-point uniaxial method was used to determine the electrical conductivity properties of the samples. The damping ratio of the samples was obtained by performing dynamic resonance tests. Ultrasound pulse velocity (UPV) and Leeb hardness tests were performed as other non-destructive testing methods. Microstructure analysis at the interfaces of conductive concrete samples were characterized by scanning electron microscopy (SEM), EDS (Energy-Dispersive X-ray Spectroscopy), and X-ray diffraction (XRD). According to the experimental results, all data agreed and confirmed each other. When SWCNT is used in combination with steel fiber, the conductive mortar samples exhibited reasonable conductivity, while their mechanical properties turned out to below.

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Snow Melting Performance of Graphene Composite Conductive Concrete in Severe Cold Environment

Cited by 16 publications

References 29 publications

Carbon-containing modifier for fluoranhydrite binder

Carbon-containing modifier for fluoranhydrite binder

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

Effects of single-walled carbon nanotubes and steel fiber on recycled ferrochrome filled electrical conductive mortars

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