Tailoring mechanical properties and microstructure of stainless steel wires-modified ultra-high performance concrete via direct electric curing

Construction and Building Materials, Год журнала: 2025, Номер 479, С. 141425 - 141425

Опубликована: Апрель 25, 2025

Язык: Английский

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The Formation Process and Mechanism of Total Activated Potassium During the Preparation of Si–Ca–K–Mg Fertilizer from Molybdenum Tailings

Minerals, Год журнала: 2025, Номер 15(5), С. 450 - 450

Опубликована: Апрель 26, 2025

Silicon–calcium–potassium–magnesium fertilizer (Si–Ca–K–Mg fertilizer), a critical acidic soil conditioner for remediating polluted soils, encounters significant challenge: substantial potassium loss through flue gas during high–temperature calcination, which increases production costs. This study optimized the blending ratio of molybdenum tailings (MTs) with CaCO3 and CaSO4, systematically investigating interplay between clinker–soluble potassium, volatile loss, total activated content calcination. Key findings include large–scale utilization tailings; mass mMTs:mCaCO3:mCaSO4 = 1:0.5:1.0 leads to K2O 3.05 wt.%. Enhancing nutrient efficiency by increasing proportion additives (with 1:0.7:0.4) results in 4.50 wt.%, is 1.5 times national standard. Mechanistically, calcination decomposes feldspar (K–feldspar) into leucite SiO2. CaO derived from reacts SiO2 form calcium silicate, facilitating decomposition water–soluble kaliophilite. Simultaneously, thermal diffusion promotes ion exchange Ca2+ CaSO4 K+ leucite, thereby forming sulfate. However, part this sulfate, along some kaliophilite, volatilizes at high temperatures, contributing loss. Recycling lost back fertilizers enables complete utilization. work establishes robust framework efficiently producing Si–Ca–K–Mg tailings, addressing key challenges retention resource recycling industrial synthesis.

Язык: Английский

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Feasibility and Application of Novel Electrical Curing Method for Constant-Temperature Hardening of Concrete at Cold Regions

Journal of Building Engineering, Год журнала: 2024, Номер 97, С. 110899 - 110899

Опубликована: Сен. 30, 2024

Язык: Английский

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Performance and microstructural characterization of fiber-reinforced cement-based grout incorporating waste tailing sand and fly ash

Materials Today Communications, Год журнала: 2024, Номер 41, С. 110289 - 110289

Опубликована: Сен. 3, 2024

Язык: Английский

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