Collaborative design of cement-based composites incorporated with cooper slag in considerations of engineering properties and microwave-absorbing characters

Guo, Haoyan; Wang, Zhenjun; An, Dengdeng; Huo, Jinyang

doi:10.1016/j.jclepro.2020.124614

Cited by 32 publications

(9 citation statements)

References 37 publications

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“…As shown in Figure 10a,b, Guo et al combined Cu slag and cement and designed macrobulk composites. [94] Different volume contents of Cu slag were added to the water/cement mixture and solidified simultaneously. When the filling ratio of Cu increased, more pores would occur in the bulk composites, causing low durability.…”

Section: Abrasion Resistancementioning

confidence: 99%

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A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

et al. 2021

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With the rapid development of 5th Generation Mobile Communication Technology (5G), late-model electromagnetic wave absorbing and shielding (EMAS) materials have proven to be the research emphasis of electromagnetic (EM) wave shelter. Great efforts have been made to optimize EMAS functional materials for diverse EM wavebands. [1] Each range of EM wave bands has a specific application in communication, electrical engineering, or information transmission. [2] For instance, ultrahigh frequency (UHF) EM wave of 0.3 < f < 3 GHz, also known as P/L/S or B/C/D/E band, is applied to television radar air navigation and mobile communication as well as microwave relay systems; the superhigh frequency (SHF) EM wave of 3 < f < 30 GHz, including S/C/X/Ku/K/ Ka-band or F/G/H/I/J/K band, is customarily adopted in digital telecommunication and satellite communication as well as waveguide communication. Moreover, EM waves in other frequency ranges, like terahertz wave and gamma ray, have been widely used in label-free DNA detection, high-temperature superconducting material research, radiographic testing, and even oncotherapy. In these cases, each specific application scenario requires specific EM waves in a specific frequency range, illustrating that EM wave clutters should be absorbed or otherwise shielded. Under these circumstances, developing novel and practical EMAS materials may meet the demands of EM wave science, especially in multifunctional fields.Traditional EMAS materials consist of resistance absorber, [3] dielectric absorber, [4] magnetic medium absorber, [5] and composites based on monomaterials as mentioned earlier, [6] including CuS, [7] MoSe 2 , [8] ferrites and alloys (Co x Fe 3Àx O 4 @C), [9] modified carbons (hollow carbon spheres), [10] etc. In the past decade, 2D transition metal carbides or nitrides, or MXenes, have been prefabricated and naturally applied to EMAS materials synthesis due to their outstanding EM wave loss capacity. [11] Many scholars have devoted themselves to MXene materials and structure design. The electrical conductivity of MXenes can reach 10 3 S cm À1 , leading to extraordinary EM wave shielding property. [12] Many reported MXene absorbers are monolayers, [13] whereas macrostructure design is introduced. Thus, macrodevices, like hollow MXene sphere foam, [14] are synthesized. It is

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Section: Abrasion Resistancementioning

confidence: 99%

Section: Density Fieldmentioning

confidence: 99%

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A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

et al. 2021

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“…The concentration of glass in different kinds of CS varies substantially due to the diverse cooling processes, resulting in different ways of utilization. Currently, CS can be used as fine aggregate [ 21 , 22 , 23 , 24 , 25 , 26 ] or supplementary cementitious material [ 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

2022

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This paper discusses a sustainable way to prepare construction materials from metallurgical slags. Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags that could be used as supplementary cementitious materials (SCMs) and aggregates. However, they have some adverse effects that could significantly limit their applications when used in cement-based materials. The setting time is significantly delayed when steel slag is utilized as an SCM. With the addition of 30% steel slag, the initial setting time and final setting time are delayed by approximately 60% and 40%, respectively. Because the specific gravity of metallurgical slags is 10–40% higher than that of natural aggregates, metallurgical slags tend to promote segregation when utilized as aggregates. Furthermore, some metallurgical slags deteriorate the microstructure of hardened pastes, resulting in higher porosity, lower mechanical properties, and decreased durability. In terms of safety, there are issues with the soundness of steel slag, the alkali-silica reaction involving cement and electric furnace ferronickel slag, and the environmental safety concerns, due to the leaching of heavy metals from copper slag and lead-zinc slag.

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“…The paste incorporating naphthalene-based superplasticizer showed an amorphous background with some massive clusters of crystallite [ 21 ]. Similarly, when sodium benzenesulfonate, sodium dodecylbenzenesulfonate and melamine-based superplasticizer were added in different forms to form ettringite, these additives all delayed the hydration of the hydration phase, inhibited the growth of ettringite crystals and led to a decrease in the amount of ettringite produced in the early stages [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Naphthalene-Based Superplasticizer and Polycarboxylic Acid Superplasticizer on the Properties of Sulfoaluminate Cement

Tang

et al. 2021

Materials

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In order to study what the effect of superplasticizers on the setting time, fluidity and compressive strength of calcium sulfoaluminate cement (CSA) a naphthalene-based superplasticizer (BNS) and a polycarboxylic acid superplasticizer (PC) were selected to interact with CSA pastes and ye’elimite, respectively. X-ray diffraction (XRD), thermogravimetric (TG) analysis and scanning electron microscopy (SEM) analytical methods were used to investigate the class, amount and microstructure of the CSA pastes and ye’elimite pastes hydration products under the effect of the superplasticizers. The results showed that the addition of BNS can promote ettringite generation and thus improve the early compressive strength. As the addition of BNS increased from 0.8 wt% to 2.0 wt%, the initial setting time was prolonged 10 min, the final setting time was prolonged 7 min, the 5 min fluidity was improved from no fluidity to 220 mm. However, as the addition of PC increased from 0.08 wt% to 0.20 wt%, the setting time of the PC just changed within 3 min; the 5 min fluidity increased from 110 mm to 195 mm and no 15 min fluidity at all was observed. AS seen by SEM, it can be stated that generated ettringite under the addition of PC was layered and lacking bonding, and its morphology changed from rod-like to flake-like, leading to a decrease in early compressive strength.

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Collaborative design of cement-based composites incorporated with cooper slag in considerations of engineering properties and microwave-absorbing characters

Cited by 32 publications

References 37 publications

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

Effect of Naphthalene-Based Superplasticizer and Polycarboxylic Acid Superplasticizer on the Properties of Sulfoaluminate Cement

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