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·ZHAO Ling CHENG Zheng ming ZHENG Wei cheng WANG Tong bin LIU Zi min FAN Wei wei ZHANG Hao LONG Hong ming Studies on thermal conductivity and durability of modified steel slag/rubber composites[J] Chinese Journal of EngineeringDOI 10
·Electric Arc Furnace EAF steel slag is the basic material used to obtain good quality aggregates in different layers of road pavements Many scientific papers have reported on the high frictional lower thermal conductivity of the EAF slag aggregates used in Catalonia Spain These aggregates have the necessary mechanical and chemical
·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
· Thermal conductivity and heat capacity In the ilmenite electro smelting process the titania slag with high activity is corrosive to refractory materials Hence the furnace wall is protected by a freeze lining of solid slag Thermal conductivity directly affects the formation of the freeze lining in the furnace
Using steel slag and fly ash solid wastes to fabricate ceramics based phase change composites with excellent mechanical and thermal properties applied in thermal energy storage with compressive strength and Young s modulus of and MPa respectively Its thermal conductivity is ± W m −1 K −1 and after 40
·In addition the steel slag based ceramic material combines the advantages of high thermal conductivity and high specific heat with outstanding heat transfer rate and heat storage density In terms of thermal durability the solid particles exhibit ultra stable solar weighted absorptance superior thermal shock resistance and abrasion resistance
·The steel slag heat storage material has the best performance when the content of pretreated steel slag is 60 wt% and the sintering temperature is 1200 °C Its compressive strength is stabilized at about 80 MPa thermal conductivity is W/ m·K and thermal density is J/g in the range of 50 1000 °C More importantly it has
This work examined the thermal conductivity of Steel Slag Tiles SST Six samples were investigated with SS compositions ranging from 0100wt% Thermal conductivity test was conducted following standard procedure The steady state heating approach was adopted in conducting the test It was observed that the thermal conductivity of SST decreased as the
The raw materials combination of sand shale 94 wt% and steel slag 6 wt% showed better properties of strength Mpa bulk density g cm −3 total porosity % closed porosity % and thermal conductivity Wm −1 K −1 which illustrate that the fabricated ceramic material with steel slag and sand shale can be
·The results showed that the carbon sequestration rate of the carbide slag steel slag hybrid material could reach % The thermal storage density of sample C SC4 reached J/g the thermal conductivity was W/ m
·Experiment results indicate that diabase and hot stuffy steel slag possesses higher thermal conductivity and that particles of sizes and mm are the most effective sizes The thermal conductivities of the asphalt mixtures firstly
·In contrast after 10 thermal cycles specimens exhibit a similar decrease in thermal conductivity being slightly lower in samples with steel slag aggregates Regardless of the cement type used the reduction of thermal conductivity in silico calcareous aggregate concrete specimens is nearly 50% while in steel slag specimens 60%
·Even more the thermal conductivity is W· m·K −1 at 25 250 and 500 °C respectively which is % higher than that of steel slag Hence the thermal properties of steel slag have been significantly improved by the developed Na 2
·The thermal performance of the backfill material used in ground source heat pump systems directly affects their heat transfer efficiency To enhance the heat transfer efficiency aiming at the low heat conductivity of existing backfill materials this paper proposes a waste steel slag calcareous clay mixture as the backfill material for buried pipes
·Steel slag aggregate and copper slag aggregate reduced thermal conductivity of concrete by 23 % and % respectively compared to the natural aggregate sample
·Currently most researchers mainly focus on the impact of steel slag on mechanical strength and thermal conductivity while neglecting its effects on other properties such as fire resistance freeze thaw resistance abrasion resistance and corrosion resistance These neglected information still needs future research [12 13] 7 Conclusions
·Waste heat recovery from hot steel slag was determined in a granular bed through the combination of numerical simulation and an industrial test method First the effective thermal conductivity of the granular bed was calculated Then the unsteady state model was used to simulate the heat recovery under three different flow fields O type S type and
Downloadable Substituting steel slag for mineral materials in road construction has potential economic and environmental benefits 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 asphalt mixture SSAM
·More recently Guotong Wang et al [48] presented a detailed study of Steel Slag Aggregate SSA on permeable concrete and its amelioration effect Jiao et al [49] verified the feasibility of adding steel slag to asphalt mixes as thermal aggregate to increase thermal conductivity for electrical thermal snow melting All these studies focused
·Steel slag is produced in the melting process of the iron ore and about 10 20% of slag is generated per ton of steel [3] Steel slag is mostly consist of oxides of aluminum calcium iron magnesium and silicon [7] [19] [20] The thermal conductivity of s slag increased with the increase of temperature It increased significantly in
·Major components of such a novel cooling asphalt pavement include a binary eutectic mixture of fatty acid PCMs palmitic acid PA and stearic acid SA a supporting material waste steel slag aggregate SSA and a thermal conductivity enhancer TCE Nano Al 2 O 3 The following conclusions can be
·Meanwhile the thermal conductivity of pure steel slag samples was only W m −1 K −1 but the composites with 29 wt% 38 wt% 44 wt% and 50 wt% KNO 3 exhibited thermal conductivities ranging from to W m −1 K −1 In addition we found that these composites presented excellent cyclic thermal stabilities including a low
·The thermal conductivity of the SSRAM with different steel slag content 0% 20% 40% 60% 80% and 100% was and W/ m·K respectively Measurements of the outdoor temperature distribution further confirmed that steel slag increased the thermal conductivity of the mixtures thereby increasing the
·ratios of thermal conductivity Keywords EICP Granite residual soil Heat transfer mechanism Steel slag Thermal conductivity 1 Introduction Geothermal energy is a potential clean and renewable heat resource to replace the traditional fossil fuels which emit the greenhouse gas contributing to the global environment degradation [1 45]
