Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass
The use of waste in the production of building materials is one of the possible ways to solve problems related to the sustainable management of non-degradable waste and difficult-to-recycle secondary resources. In this paper, a method is proposed for the non-autoclave production of an ultra-lightwei...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/1/17 |
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| author | Svetlana V. Samchenko Andrey V. Korshunov |
| author_facet | Svetlana V. Samchenko Andrey V. Korshunov |
| author_sort | Svetlana V. Samchenko |
| collection | DOAJ |
| description | The use of waste in the production of building materials is one of the possible ways to solve problems related to the sustainable management of non-degradable waste and difficult-to-recycle secondary resources. In this paper, a method is proposed for the non-autoclave production of an ultra-lightweight cellular concrete based on Portland cement, glass waste and liquid glass. A mixture of sodium hexafluorosilicate and hydroxide is used as a hardening activator, an aluminum powder serves as a gas-forming agent. The setting and hardening of raw mixtures occurs under the action of exothermal heat release due to a complex of chemical reactions occurring in the system, and the resulting material does not require additional heat treatment. It is optimal to use two fractions of glass waste to achieve acceptable material strength: coarse crushed (fineness modulus <i>F</i><sub>m</sub> = 0.945) and finely ground (specific surface <i>S</i><sub>sp</sub> = 450–550 m<sup>2</sup>/kg) glass. Glass particles of the fine fraction of glass, along with Portland cement, participate in hydrolytic and structure-forming processes, while glass particles of the coarse fraction play the role of reinforcing filler. The influence of the dispersion of glass and the density of liquid glass on the density, porosity, strength, water absorption and water resistance of the resulting cellular material was determined. At an average density of cellular concrete in the dry state of 150–320 kg/m<sup>3</sup>, the following characteristics can be achieved: a compressive strength up to 2.0 MPa, bending strength up to 0.38 MPa, thermal conductivity coefficient of the material in the range 0.05–0.09 W/(K·m), and a maximum operating temperature of 800 °C. The proposed ultra-lightweight cellular concrete can be used as a non-combustible heat and sound insulation material, as well as a repairing composition; the cellular concrete blocks can be used as filling masonry and for the construction of non-bearing internal walls. |
| first_indexed | 2024-03-08T09:56:43Z |
| format | Article |
| id | doaj.art-3f2352bab98e400195203cb819e1f79a |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:56:43Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-3f2352bab98e400195203cb819e1f79a2024-01-29T13:48:13ZengMDPI AGBuildings2075-53092023-12-011411710.3390/buildings14010017Formation of Cellular Concrete Structures Based on Waste Glass and Liquid GlassSvetlana V. Samchenko0Andrey V. Korshunov1Department of Building Materials, Moscow State University of Civil Engineering, 26, Yaroslavskoye Shosse, 129337 Moscow, RussiaDepartment of Building Materials, Moscow State University of Civil Engineering, 26, Yaroslavskoye Shosse, 129337 Moscow, RussiaThe use of waste in the production of building materials is one of the possible ways to solve problems related to the sustainable management of non-degradable waste and difficult-to-recycle secondary resources. In this paper, a method is proposed for the non-autoclave production of an ultra-lightweight cellular concrete based on Portland cement, glass waste and liquid glass. A mixture of sodium hexafluorosilicate and hydroxide is used as a hardening activator, an aluminum powder serves as a gas-forming agent. The setting and hardening of raw mixtures occurs under the action of exothermal heat release due to a complex of chemical reactions occurring in the system, and the resulting material does not require additional heat treatment. It is optimal to use two fractions of glass waste to achieve acceptable material strength: coarse crushed (fineness modulus <i>F</i><sub>m</sub> = 0.945) and finely ground (specific surface <i>S</i><sub>sp</sub> = 450–550 m<sup>2</sup>/kg) glass. Glass particles of the fine fraction of glass, along with Portland cement, participate in hydrolytic and structure-forming processes, while glass particles of the coarse fraction play the role of reinforcing filler. The influence of the dispersion of glass and the density of liquid glass on the density, porosity, strength, water absorption and water resistance of the resulting cellular material was determined. At an average density of cellular concrete in the dry state of 150–320 kg/m<sup>3</sup>, the following characteristics can be achieved: a compressive strength up to 2.0 MPa, bending strength up to 0.38 MPa, thermal conductivity coefficient of the material in the range 0.05–0.09 W/(K·m), and a maximum operating temperature of 800 °C. The proposed ultra-lightweight cellular concrete can be used as a non-combustible heat and sound insulation material, as well as a repairing composition; the cellular concrete blocks can be used as filling masonry and for the construction of non-bearing internal walls.https://www.mdpi.com/2075-5309/14/1/17cellular concretewaste glassliquid glassalkaline activationporous structurecompressive and bending strength |
| spellingShingle | Svetlana V. Samchenko Andrey V. Korshunov Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass Buildings cellular concrete waste glass liquid glass alkaline activation porous structure compressive and bending strength |
| title | Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass |
| title_full | Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass |
| title_fullStr | Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass |
| title_full_unstemmed | Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass |
| title_short | Formation of Cellular Concrete Structures Based on Waste Glass and Liquid Glass |
| title_sort | formation of cellular concrete structures based on waste glass and liquid glass |
| topic | cellular concrete waste glass liquid glass alkaline activation porous structure compressive and bending strength |
| url | https://www.mdpi.com/2075-5309/14/1/17 |
| work_keys_str_mv | AT svetlanavsamchenko formationofcellularconcretestructuresbasedonwasteglassandliquidglass AT andreyvkorshunov formationofcellularconcretestructuresbasedonwasteglassandliquidglass |