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Influence of material composition on physical performance of earthen plasters
https://orcid.org/0000-0003-2246-8563
https://orcid.org/0000-0001-6647-6755
Abstract Earthen plasters have been widely used in historical buildings such as grottoes, which have high historical, artistic, scientific, social, and cultural values. In order to study the influence of the material composition of plasters on its physical performance, a total of seven different types of earthen plaster specimens were made using Dengban clay and six admixtures (quartz sand, two types of vegetal fibers, and three types of hydraulic limes), and the surface water absorption properties, hygrothermal properties, surface strength (surface hardness, surface cohesion, and surface impact resistance), color difference, and radial shrinkage of all plasters were systematically investigated and compared. The results show that the addition of sand, vegetal fibers, and hydraulic limes all changed the surface water absorption, thermal conductivity, and water vapor permeability of plaster, and inhibit the radial shrinkage during the curing process. Compared to the other admixtures, sand had the least effect on the overall performance of plasters. Both types of vegetal fibers can greatly improve the impact resistance of plaster surface, but due to the formation of microcracks on the surface of the plaster with wheat straw fibers, its water absorption is much higher than that of the plaster with hemp fibers. The addition of three types of hydraulic limes changed the surface color of the plaster to some extent, and the water repellency of the plaster surface will be enhanced due to the carbonation of hydraulic lime.
Highlights The physical performance of seven types of earthen plasters was investigated. The carbonation process enhances the water repellency of the plasters with hydraulic lime added. The addition of vegetal fibers has greatly improved the impact resistance of the plaster surface. The addition of hydraulic lime has an effect on the surface color (ΔE > 3).
Influence of material composition on physical performance of earthen plasters
https://orcid.org/0000-0003-2246-8563
https://orcid.org/0000-0001-6647-6755
Abstract Earthen plasters have been widely used in historical buildings such as grottoes, which have high historical, artistic, scientific, social, and cultural values. In order to study the influence of the material composition of plasters on its physical performance, a total of seven different types of earthen plaster specimens were made using Dengban clay and six admixtures (quartz sand, two types of vegetal fibers, and three types of hydraulic limes), and the surface water absorption properties, hygrothermal properties, surface strength (surface hardness, surface cohesion, and surface impact resistance), color difference, and radial shrinkage of all plasters were systematically investigated and compared. The results show that the addition of sand, vegetal fibers, and hydraulic limes all changed the surface water absorption, thermal conductivity, and water vapor permeability of plaster, and inhibit the radial shrinkage during the curing process. Compared to the other admixtures, sand had the least effect on the overall performance of plasters. Both types of vegetal fibers can greatly improve the impact resistance of plaster surface, but due to the formation of microcracks on the surface of the plaster with wheat straw fibers, its water absorption is much higher than that of the plaster with hemp fibers. The addition of three types of hydraulic limes changed the surface color of the plaster to some extent, and the water repellency of the plaster surface will be enhanced due to the carbonation of hydraulic lime.
Highlights The physical performance of seven types of earthen plasters was investigated. The carbonation process enhances the water repellency of the plasters with hydraulic lime added. The addition of vegetal fibers has greatly improved the impact resistance of the plaster surface. The addition of hydraulic lime has an effect on the surface color (ΔE > 3).
Influence of material composition on physical performance of earthen plasters
https://orcid.org/0000-0003-2246-8563
https://orcid.org/0000-0001-6647-6755
Abstract Earthen plasters have been widely used in historical buildings such as grottoes, which have high historical, artistic, scientific, social, and cultural values. In order to study the influence of the material composition of plasters on its physical performance, a total of seven different types of earthen plaster specimens were made using Dengban clay and six admixtures (quartz sand, two types of vegetal fibers, and three types of hydraulic limes), and the surface water absorption properties, hygrothermal properties, surface strength (surface hardness, surface cohesion, and surface impact resistance), color difference, and radial shrinkage of all plasters were systematically investigated and compared. The results show that the addition of sand, vegetal fibers, and hydraulic limes all changed the surface water absorption, thermal conductivity, and water vapor permeability of plaster, and inhibit the radial shrinkage during the curing process. Compared to the other admixtures, sand had the least effect on the overall performance of plasters. Both types of vegetal fibers can greatly improve the impact resistance of plaster surface, but due to the formation of microcracks on the surface of the plaster with wheat straw fibers, its water absorption is much higher than that of the plaster with hemp fibers. The addition of three types of hydraulic limes changed the surface color of the plaster to some extent, and the water repellency of the plaster surface will be enhanced due to the carbonation of hydraulic lime.
Highlights The physical performance of seven types of earthen plasters was investigated. The carbonation process enhances the water repellency of the plasters with hydraulic lime added. The addition of vegetal fibers has greatly improved the impact resistance of the plaster surface. The addition of hydraulic lime has an effect on the surface color (ΔE > 3).
Influence of material composition on physical performance of earthen plasters
Jia, Quanquan (author) / Chen, Wenwu (author) / Tong, Yanmei (author)
2024-01-26
Article (Journal)
Electronic Resource
English
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