Thermal conductivity enhancement of backfill material and …
Steel slag, a by-product of steelmaking, can be used as backfill material for energy structures, and the granite residual soil is a common soil type in civil infrastructure. The thermal conductivity of backfill materials and soils surrounding the piles is the crucial parameter which has influence on the heat transfer. In this paper, the steel slag and granite residual soil were …
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Preparation and characterization of modified steel slag …
Steel slag had a low thermal conductivity due to its large internal pore structure (Zhang et al., 2020). The thermal conductivity of the SS may continue to decrease after acid and alkaline …
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Study on thermal properties of steel slag asphalt concrete …
Fig. 11 shows the thermal conductivity results of TPS testing, and the same trend as the parallel hot-wire method can be observed in the curves, namely, the thermal conductivities of the asphalt mixtures first increased, before decreasing with an increase in the steel slag replacement, and SS-60 was proven to be the optimal steel slag content ...
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Performance assessment of sustainable asphalt concrete using steel slag …
Thermal properties were also assessed, showing that the maximum thermal conductivity was achieved at an asphalt content of 5.2 %. The slag-based mixtures, M1 and M2, showed higher thermal conductivity than the control mix M0, with maximum values of 0.74 W/mK for M1 and 0.86 W/mK for M2, compared with 0.56 W/mK for M0.
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Utilization of steel slags to produce thermal conductive …
This study focuses on the thermal conductivity of steel slag asphalt mixtures. The initial aim of this study was to verify the feasibility of adding steel slag to asphalt mixtures as a …
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Road Performance, Thermal Conductivity, and …
However, the addition of steel slag will increase the thermal conductivity of asphalt mixture, decreasing its low temperature performance, especially the content of steel slag added is higher than optimum.
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Exploration of steel slag for thermal energy storage and …
The thermal energy storage density of steel slag is 797.9 kJ·kg −1 (400–900 °C), the thermal conductivity was measured as 0.505, 0.532 and 0.670 W·(m·K) −1 at 25, 250 and 500 °C, respectively.
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Studies on thermal conductivity and durability of modified …
While the modified electric furnace slag/rubber composite material had large pores and the best dispersibility, which reduced interface thermal resistance and easily formed …
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Development of a novel emulsified asphalt enhanced steel slag …
Steel slag-based geopolymer ed concrete (SSGFC) provide a promising value-added and carbon-neutral strategy for the re-utilization of SS, and the strength and physical properties of SSGFC are essential to its practical application. ... and thermal conductivity decreased by 31.3 %. Therefore, EA shows significant potential to enhance the ...
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Thermal Conductivity Evaluation and Road Performance Test of Steel Slag
To better utilize the functional properties of steel slag in asphalt mixtures, such as ice and snow melting, self-healing, etc., the microscopic properties and thermal conductivity of steel slag and SSAM were studied in this paper.
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Experimental and theoretical study of fire resistance of steel slag
Drawing on Chinese Standard GB/T 20491–2017 Steel slag powder used for cement and concrete [34] and related research results [10] ... The addition of SSP causes the thermal conductivity of concrete to increase for several reasons: (i) The density of SSP is usually higher than that of cement and it contains many metal oxides with greater ...
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Preparation and characterization of modified steel slag …
The thermal conductivity of PW was very low, just 0.311 W/(m·K). The thermal conductivity of Alkali SSCPCM and Acid SSCPCM reached 0.674 W/(m·K) and 0.808 W/(m·K), which were more than two times of the thermal conductivity of pure paraffin. Steel slag had a low thermal conductivity due to its large internal pore structure (Zhang et al., 2020 ...
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Heat transfer characteristics and heat conductivity …
The heat conductivity of clay improved in the range of 3.28 %–14.59 %, the heat conductivity of the steel slag improved in the range of 1.91 %–25.56 %, and the heat conductivity of mixtures 1 and 2 improved in the ranges of 3.97 %–28.57 % and 2.65 %–17.87 %, respectively, due to different gradations. This is attributed to the grading ...
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Utilization of steel slags to produce thermal conductive …
This study focuses on the thermal conductivity of steel slag asphalt mixtures.The initial aim of this study was to verify the feasibility of adding steel slag to asphalt mixtures as a thermal aggregate to increase the thermal conductivity for electrical-thermal snow melting. The thermal conductivity of different rock aggregates and steel slags were firstly tested, before the …
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Thermal and mechanical properties of bio-cemented quartz …
The thermal conductivity of the steel slag is 0.4–1 W/(m⊡K) which is much less than that of the quartz sand and calcium carbonate. Consequently, increasing the SSC of the quartz sand would cause a decline in the thermal conductivity of the loose materials and the EICP-treated specimens.
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Thermal Conductivity Evaluation and Road Performance Test of Steel Slag
After comprehensive consideration of the thermal conductivity and road performance, it is recommended that the optimum content of steel slag is not more than 60%.
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Thermal Conductivity Evaluation and Road …
To better utilize the functional properties of steel slag in asphalt mixtures, such as ice and snow melting, self-healing, etc., the microscopic properties and thermal conductivity of steel slag and SSAM were studied in …
WhatsApp: +86 18221755073
Utilization of steel slags to produce thermal conductive …
This study focuses on the thermal conductivity of steel slag asphalt mixtures. The initial aim of this study was to verify the feasibility of adding steel slag to asphalt mixtures as a thermal aggregate to increase the thermal conductivity for electrical-thermal snow melting.
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Thermal Conductivity Evaluation and Road Performance …
The thermal conductivity was the quantitatively evaluated by the heating wire method. Theoretical calculations were used to verify the reliability of the quantitative characterization. Finally, the …
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Road Performance, Thermal Conductivity, and Temperature …
Experiment results indicate that diabase and hot-stuffy steel slag possesses higher thermal conductivity, and that particles of sizes 9.5–13.2, 1.18–2.36 and 0.3–0.6 mm are the most ...
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Studies on thermal conductivity and durability of modified steel slag …
While the modified electric furnace slag/rubber composite material had large pores and the best dispersibility, which reduced interface thermal resistance and easily formed thermal...
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Road Performance, Thermal Conductivity, and …
This study investigates the in・Ｖence of steel slag content on the road performance, thermal conductivity and outdoor temperature distribution of steel slag rubber asphalt mixtures …
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Road Performance, Thermal Conductivity, and …
Steel slag; rubber; thermal conductivity; temperature stress; asphalt mixture 1 Introduction Steel slag is a by-product of the steel making process. Recycled steel slag is used in the construction industry and agriculture, but a large amount of steel slag becomes discarded on the ground, imposing huge pressures on environmental protection.
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Road Performance, Thermal Conductivity, and Temperature …
The steel slag additive increased the thermal conductivity of the mixtures. A steel slag content of 20% abruptly changed the thermal conductivity of the mixture. As the steel slag content increased further, the thermal conductivity steadily increased as shown in Fig. 6. According to the previous test results, SSRAM specimens with different ...
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Thermal Conductivity Evaluation and Road Performance Test of Steel Slag
There are many kinds of minerals in steel slag, notably the presence of iron-containing active minerals, which not only increases the activity of steel slag but also greatly improves the thermal conductivity of steel slag itself.
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Thermal Conductivity Evaluation and Road Performance Test …
Due to the excellent thermal conductivity of steel slag, it is often used in functional pavements. However, there are few studies on the thermal conductivity characterization of steel slag …
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Research on the Mechanical, Thermal, Induction Heating and …
In this paper, steel slag/steel fiber composite asphalt mixture were prepared. The effects of the addition of steel slag and/or steel fibers on the mechanical, thermal, induction heating and healing properties of asphalt mixture were investigated. The results showed that adding steel slag and/or steel fibers improves the water stability, particle loss resistance and fracture energy of asphalt ...
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Evaluation of the effect of metallurgical aggregates (steel …
Steel slag aggregate and copper slag aggregate reduced thermal conductivity of concrete by 23 % and 4.5 % respectively compared to the natural aggregate sample. Finally, according to the experiment results and the use of Vikor statistical method, it was revealed that concrete samples made of 50 % copper slag aggregate and 50 % natural aggregate ...
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Thermal Conductivity Evaluation and Road …
steel slag can improve the healing effect of asphalt mixtures. The asphalt mixture of coarse stone and fine steel slag has a more uniform temperature distribution, and the healing effect
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Preparation and characterization of modified steel slag …
Steel slag had a low thermal conductivity due to its large internal pore structure (Zhang et al., 2020). The thermal conductivity of the SS may continue to decrease after acid and alkaline washing. After SS and PW were prepared into SSCPCM, the pore structure in …
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