High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

Kamarou, Maksim; Moskovskikh, Dmitry; Kuskov, Kirill; Yudin, Sergey; Akinwande, Abayomi Adewale; Smorokov, Andrey; Özkılıç, Yasin Onuralp; Abdulwahid, Mohanad Yaseen; Bhowmik, Abhijit; Romanovskaia, Elena; Korob, Natalia; Paspelau, Andrei; Romanovski, Valentin

doi:10.1177/0734242x241240042

Cited by 4 publications

References 49 publications

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Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Romanovski,

Moskovskikh,

Tan

et al. 2024

Engineering Reports

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A method has been developed for separating a mixture of calcium, magnesium and sodium sulfates obtained through the interaction of sulfuric acid and waste from the water purification process generated by using membrane filters. The primary goal of this method is to extract gypsum and produce gypsum‐based binders. Patterns were identified regarding how various types, ratio and quantities of additives: blast furnace slag, granite screenings, portland cement, electric steel smelting slag affect the water‐gypsum ratio, strength properties, and water resistance of high‐strength gypsum binders. It was found that adding a single‐component additive specifically to enhance water resistance does not significantly impact these properties. Complex additives have been developed based on Portland cement, granulated blast furnace slag, electric furnace slag, expanded clay dust, and granite screenings of various fractions. These additives are designed to maximize the water resistance of high‐strength gypsum binder based on synthetic calcium sulfate dihydrate. As a result, the water resistance coefficient increased from 0.45 to 0.52. Additionally, a technological block diagram of the process has been proposed.

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Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Romanovski,

Moskovskikh,

Tan

et al. 2024

Engineering Reports

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High Strength Anhydrite Cement Based on Lime Mud From Water Treatment Process: One Step Synthesis in Water Environment, Characterization and Technological Parameters

Kamarou,

Tan,

Moskovskikh

et al. 2024

Engineering Reports

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In the process of water treatment from surface water sources, lime mud as waste is formed. This waste contains CaO, Ca(OH)2, and CaCO3. The article proposes a comprehensive method for processing lime mud into high‐strength anhydrite cement. The method involves the interaction of lime mud with waste sulfuric acid from the production of polymer fibers using a structure‐controlled method in the (CaO·Ca(OH)2·CaCO3)—H2SO4—H2O system at a temperature of 40°C. X‐ray diffraction analysis showed the presence of CaSO4 and CaSO4·0.62H2O phases with a purity of 99.8%. The structure‐controlled method makes it possible to control the formation and growth of calcium sulfate crystals of the required shape and size, due to which it is possible to obtain anhydrite cement with desired properties. Combined grinding of synthetic anhydrite with activator additives makes it possible to obtain anhydrite cement with a strength of up to 28.5 MPa.

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Maximizing strength and durability in wood concrete (arbolite) via innovative additive control and consumption

Yagubkin,

Shabanov,

Niyakovskii

et al. 2024

Biomass Conv. Bioref.

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A new approach for assessing the effectiveness and determining the consumption of additives to regulate the structural and mechanical characteristics of wood concrete is proposed, which allows rapid assessment in a short time and reduces the consumption of materials. The period is reduced from 28 to 1 day, and the sample sizes are reduced from 150 × 150 × 150 to 20 × 20 × 20 mm compared to those of the standard method. The results obtained are comparable using both methods within an error of up to 7%. The thermal conductivity of wood concrete with the addition of potassium sulfate was 20.8% less than that with the addition of calcium chloride. This reduction will reduce wall thickness, material consumption, and cost by 20.8%. In this regard, potassium sulfate, which does not form crystalline hydrates and makes it possible to obtain a material with lower thermal conductivity than other additives, all other things being equal, has a new advantage for wood concrete. In addition, potassium sulfate reduces the risk of corrosion of cement stone because one of the main causes of corrosion is crystalline hydrates. Reducing the risk of corrosion will increase the durability of the material.

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High-strength gypsum binder with improved water-resistance coefficient derived from industrial wastes

Cited by 4 publications

References 49 publications

Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

High Strength Anhydrite Cement Based on Lime Mud From Water Treatment Process: One Step Synthesis in Water Environment, Characterization and Technological Parameters

Maximizing strength and durability in wood concrete (arbolite) via innovative additive control and consumption

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