Fast-Curing Composites Based on Multicomponent Gypsum Binders

Lesovik, Valery; Drebezgova, Mariya; Fediuk, Roman

doi:10.1061/(asce)mt.1943-5533.0003313

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Additionally, temperature significantly influenced the cement hardening process (Iesaka et al, 2004;Termkhajornkit and Barbarulo, 2012;Wang, 2022). Gypsum serves as a widely employed gas-hardening cementing agent in similar material experiments, possessing lower strength, lower cost, and a faster hardening process, making it potentially more suitable for simulating low-strength and brittle materials (Misnikov, 2018;Lesovik et al, 2020;Shi et al, 2022). However, pure gypsum is suitable for simulating linear elastic materials, the mechanical properties of overlying strata in coal seams often exhibit nonlinearity with significant deformations (Mou et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Experimental study and application of similar materials in thick coal seam mining

Liu,

Yin,

Thanh

et al. 2024

Front. Energy Res.

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The orthogonal experiments of similar materials were optimized and analyzed in order to accurately simulate the mechanical properties and the fracture evolution law of thick coal seam overlying strata during mining in this study. The experimental results indicated that similar materials using gypsum and calcium carbonate as cementing agents had a wide range of compressive strength (173.80 kPa–425.95 kPa) and were suitable for simulating various rock properties. Adding an appropriate amount of calcium carbonate can improve the brittleness and mechanical properties of similar materials using gypsum as cementing agents. The failure mode of similar materials transitioned from shear to tensile failure with the increase of the mass ratio of aggregate to cementing agents and the mass ratio of calcium carbonate to gypsum. Moreover, the compressive strength of similar materials rapidly decreased with an increase in the mass ratio of aggregate to cementing materials. And the compressive strength showed an increasing trend with the decrease of the mass ratio of calcium carbonate to gypsum. Moisture content had a significant impact on the density of similar materials, other parameters had small impacts. A thick coal seam mining experimental model was designed based on the experimental results of similar materials, which showed that Qianjiaying Mine may experience basic roof collapse when mining reached 58.1 m. The recommended periodic weighting pace for face pressure on the working face was approximately 15.0 m. Appropriate measures are necessary to adopt to prevent disasters after mining to a length of 58.1 m, followed by every 15.0 m of mining.

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Section: Introductionmentioning

confidence: 99%

Experimental study and application of similar materials in thick coal seam mining

Liu,

Yin,

Thanh

et al. 2024

Front. Energy Res.

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“…Obtaining effective gypsum compositions is possible through a combination of the above methods. For example, rational compositions of gypsum compositions for various purposes were obtained by the authors of [ 31 ] using several approaches to their design.…”

Section: Introductionmentioning

confidence: 99%

“…As a rule, a positive effect is due not only to packing density [ 43 ], but also to a change in the morphology of gypsum crystals formed during hydration and curing [ 43 ]. Thus, several approaches to the design of the structure were used at once [ 31 ], the introduction of an aluminosilicate component also plays the role of a filler [ 27 ] and affects the microstructure by changing the morphology and the formation of neoplasms [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

et al. 2023

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The article considered the issues of the modification of gypsum stone to improve its performance properties. The influence of mineral additives on the physical and mechanical characteristics of the modified gypsum composition is described. The composition of the gypsum mixture included slaked lime and an aluminosilicate additive in the form of ash microspheres. It was isolated from ash and slag waste from fuel power plants as a result of their enrichment. This made it possible to reduce the carbon content in the additive to 3%. Modified compositions of the gypsum composition are proposed. The binder was replaced with an aluminosilicate microsphere. Hydrated lime was used to activate it. Its content varied: 0, 2, 4, 6, 8 and 10% of the weight of the gypsum binder. Replacing the binder with an aluminosilicate product for the enrichment of ash and slag mixtures made it possible to improve the structure of the stone and increase its operational properties. The compressive strength of the gypsum stone was 9 MPa. This is more than 100% higher than the strength of the control composition of gypsum stone. Studies have confirmed the effectiveness of using an aluminosilicate additive—a product of enrichment of ash and slag mixtures. The use of an aluminosilicate component for the production of modified gypsum mixtures allows the saving of gypsum resources. Developed formulations of gypsum compositions using aluminosilicate microspheres and chemical additives provide the specified performance properties. This makes it possible to use them in the production of self-leveling floors, plastering and puttying works. Replacing traditional compositions with a new composition based on waste has a positive effect on the preservation of the natural environment and contributes to the formation of comfortable conditions for human habitation.

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“…Based on already conducted studies [10][11][12][13][14], we can conclude that today the main issue remains optimization of geometric parameters and physical properties of fibers, which are determined by the need to ensure a reliable adhesion of the fibers to the cement matrix under permitted loads, and also to resist the tensile forces [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Amorphous fiber based on the Fe-B-C molten system for bulk reinforcement of concrete

et al. 2018

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The article deals with the use of amorphous fiber of the Fe-B-C system, which was obtained by spinning the melt. Comparative tests of the samples made on the basis of the test material on the compressive strength and tensile strength of the traditional destructive method were made. The conductivity of the samples was also tested. Physical and mechanical characteristics of the material are obtained.

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Fast-Curing Composites Based on Multicomponent Gypsum Binders

Cited by 5 publications

References 27 publications

Experimental study and application of similar materials in thick coal seam mining

Experimental study and application of similar materials in thick coal seam mining

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

Amorphous fiber based on the Fe-B-C molten system for bulk reinforcement of concrete

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