Experts in China have studied the basic causes of the weathering and collapse of the gravel and rock caves of the Silk Road, and through various scientific experiments, they have found effective materials and methods for reinforcing the grottoes. This method provides technical possibilities for the long-term preservation of cave art in China.
On the ancient Silk Road in northwestern China, a large number of ruins remain. Most of the rock masses in these grottoes belong to glutenite, and most of them are muddy cements, such as Dunhuang Mogao Grottoes, Maijishan Grottoes, and Binglingsi Grottoes. Since cements in the glutenite bodies of these grottoes are mostly clays that are easily disintegrated with water, and some contain more clay minerals that can easily swell when exposed to water, the gravel rock bodies in these grottoes are large and loose. The mechanical strength is very low. Li Zuoxiong, deputy dean of the Dunhuang Research Institute and member of the International Society of Rock Mechanics, pointed out that the biggest problems faced by the grottoes on the ancient Silk Road are severe weathering, wind erosion, rain erosion and cracking and collapse.
To protect these gravel caves, the experts studied the physical and mechanical characteristics of the rock, and identified the rock and minerals using polarized light microscopy. At the same time, the sandstone and conglomerate cements were analyzed. When studying the weathering mechanism of glutenite rock, experts found that PS (an inorganic binder), after infiltrating the weathered glutenite and interacting with cementitious argillite, can change the physical properties and engineering properties of the clay mineral and greatly improve the glutenite. Its stability makes it highly resistant to wind erosion and weathering.
Based on this research, experts conducted extensive experiments using PS as a rock reinforcement material. The results show that: PS reinforced argillaceous conglomerate not only plays a role in cement reinforcement, but also has good water permeability, so that It can well prevent the reinforcement layer from peeling due to imperviousness. It also has good reinforcement effect on loose conglomerate. Experts involved in the study, Li Mostong, pointed out that the most important role of PS-reinforced argillaceous conglomerate is to change the microstructure of its discrete, lamellar, crystalline clay minerals, forming a dense, amorphous state. The gel network structure is therefore a very effective reinforcement material.
On the ancient Silk Road in northwestern China, a large number of ruins remain. Most of the rock masses in these grottoes belong to glutenite, and most of them are muddy cements, such as Dunhuang Mogao Grottoes, Maijishan Grottoes, and Binglingsi Grottoes. Since cements in the glutenite bodies of these grottoes are mostly clays that are easily disintegrated with water, and some contain more clay minerals that can easily swell when exposed to water, the gravel rock bodies in these grottoes are large and loose. The mechanical strength is very low. Li Zuoxiong, deputy dean of the Dunhuang Research Institute and member of the International Society of Rock Mechanics, pointed out that the biggest problems faced by the grottoes on the ancient Silk Road are severe weathering, wind erosion, rain erosion and cracking and collapse.
To protect these gravel caves, the experts studied the physical and mechanical characteristics of the rock, and identified the rock and minerals using polarized light microscopy. At the same time, the sandstone and conglomerate cements were analyzed. When studying the weathering mechanism of glutenite rock, experts found that PS (an inorganic binder), after infiltrating the weathered glutenite and interacting with cementitious argillite, can change the physical properties and engineering properties of the clay mineral and greatly improve the glutenite. Its stability makes it highly resistant to wind erosion and weathering.
Based on this research, experts conducted extensive experiments using PS as a rock reinforcement material. The results show that: PS reinforced argillaceous conglomerate not only plays a role in cement reinforcement, but also has good water permeability, so that It can well prevent the reinforcement layer from peeling due to imperviousness. It also has good reinforcement effect on loose conglomerate. Experts involved in the study, Li Mostong, pointed out that the most important role of PS-reinforced argillaceous conglomerate is to change the microstructure of its discrete, lamellar, crystalline clay minerals, forming a dense, amorphous state. The gel network structure is therefore a very effective reinforcement material.
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