The study on engineering characteristics and compression mechanisms of typical historical earthen site soil

Kong, Dequan; Wan, Rong; Chen, Jianxun; Jing, Yanlin; Huang, Weiming; Wang, Yonghui

doi:10.1016/j.conbuildmat.2019.04.028

Cited by 17 publications

(4 citation statements)

References 10 publications

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“…In the case of in-situ protection, coupled with many problems in a humid environment, long-term waterproofing and reinforcement is a challenging task. Especially for the protection of large earthen ruins, a single chemical or physical measure cannot protect the ruins well [22]. e protection of earthen relics increasingly represents the convergence and integration of multiple disciplines such as geology, modern analytical technology, applied chemistry, and materials science.…”

Section: Current Status Of Research and Application Of Compositementioning

confidence: 99%

Composite Nano-Calcium-Based Material for Reinforcement and Protection of Earthen Ruins in Humid Environment

Huang

Sun

et al. 2022

Advances in Materials Science and Engineering

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China is an ancient civilization. History has left us with a rich cultural heritage, of which ancient cultural sites account for a large proportion. As far as the current scientific research and technology are concerned, due to the particularity and complexity of the humid environment, the protection of ancient cultural sites in the humid environment is still an important topic before us. The research topic involved in this article is about the application of composite nano-calcium-based materials for the reinforcement and protection of soil sites in humid environments. Combined with the development of the research content of this article, the research thinking of the thesis is also adjusted accordingly, making the analysis and solution of the problem clearer. The first is a conceptual study, expounding the relevant concepts in this article. The main purpose is to sort out and study the reinforcement and protection measures and methods of relevant sites and ancient cultural sites, as well as the classification, characteristics, and protection value of ancient cultural sites. Through the analysis and research of these aspects, the composite nano-calcium bases for ancient cultural sites in the subsequent humid environment is proposed based on material basic information. The second is a descriptive research, qualitative and quantitative analysis of humid environment. On the basis of summarizing previous researches, this paper mainly conducts qualitative and quantitative analysis on the judgment of humid environment, the influence mechanism on ancient cultural sites, and the main diseases. Then, it is analytical research, studying the main diseases and causes of the underground palace site in the engineering case, and it is concluded that it is mainly affected by the combined effect of the characteristics of the site’s soil and the environment. Through the collection of data from the site survey, field test, and indoor experiment of the underground palace site, the preservation status of the site is collected, and the disease problems faced by the site were analyzed, making it more difficult to protect. The main problem facing the protection of soil relics in humid environment, that is, the research focus, is the research on the development and applicability of reinforcement protection materials. This article attempts to explore the protective effect of composite nano-calcium-based materials on wet sites. Practical research was conducted to verify the feasibility of composite nano-calcium-based materials in practice through indoor site soil simulation. After the completion of a series of experiments, the applicability and compatibility of the composite nano-calcium-based material to strengthen the wet site soil was verified through data analysis, data collection, and mechanism discussion. The experimental results show that the sample with a solid content of 0.4% composite nano-calcium matrix has better salt and alkali resistance. Moreover, the unconfined compressive strength growth rate of 0.4% of the samples has a qualitative improvement over other solid content samples.

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Section: Current Status Of Research and Application Of Compositementioning

confidence: 99%

Composite Nano-Calcium-Based Material for Reinforcement and Protection of Earthen Ruins in Humid Environment

Huang

Sun

et al. 2022

Advances in Materials Science and Engineering

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“…There are a large number of earthen sites in China, with more than 900 listed as national key earthen sites protection units. 1,2 Meanwhile, the number of earthen relic sites is more than 80 according to the World Heritage List (2019) published by the United Nations Educational, Scientific and Cultural Organization (UNESCO). 3 However, due to the complex environment of earthen relic sites and the fragile texture of the relics, most earthen sites suffer from many diseases and erosion, such as dry cracking of the soil, 4 salinization of the surface layer of the relics 5 and mould growth.…”

Section: Introductionmentioning

confidence: 99%

Preservation of earthen relic sites against salt damages by using a sand layer

Chang

Wen

Yu³

et al. 2022

Indoor and Built Environment

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Salt damage is one of the main problems facing the preservation of earthen sites in heritage museums. The use of salt-inhibiting materials on the surface of earthen sites to prevent damages could cause secondary damage. A method of placing a sand layer as a water and salt barrier was introduced and evaluated based on the law of unsaturated soil water and salt transport. The method involves placing a sand layer on the lower layer of the earthen site to inhibit the migration of water and salt from the deep soil to the surface of the earthen site. Experiments and numerical simulations were conducted to study the long-term effect and efficiency of water and salt barrier of sand layers with different particle sizes. The results show that the sand layer could successfully block the continuous upwards transport of water. The salt was shown to stagnate at the boundary between the bottom of the sand layer and the experimental soil. According to the simulation results, the water and salt barrier effect of the sand layer is proportional to the particle size of the sand layer. The sand layer with particle sizes much larger than the experimental soil has a durable water and salt barrier effect. These results are important for understanding the mechanism of salt damage to earthen sites and for the sustainable preservation of relics against salt damage in a soil environment.

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“…Building materials are one of the important contents for restoration of earthen sites [3]. In particular, with the development of modern material technology, the study of reinforcement and restoration materials for earthen sites has been the hot research topic for scholars [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study on Restoration Materials for Historical Silty Earthen Sites Based on Lime and Starch Ether

Kong

Chen

Wan

et al. 2020

Advances in Materials Science and Engineering

Self Cite

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The relics built with soil are called earthen archaeological sites. Many silt earthen sites exposed to natural environment get seriously damaged and thus require urgent restoration with suitable materials. Previously, lime and glutinous rice slurry were used in the construction of earthen sites. However, lime is usually used in clay, and glutinous rice pulp is difficult to prepare and use on a large scale. Therefore, in this study, starch ether was selected to replace glutinous rice pulp. Lime and starch ether were added to silt as single or double additives, respectively, to prepare the corresponding single-mixed and multiple-mixed modified soil samples. Furthermore, the direct shear test and compression test were carried out and the optimum content was determined. The strength and durability of optimum modified materials were compared with those of the original site soil. When the lime content was 9% or the concentration of starch ether solution was 5%, the shear strength and compression resistance ability of single-mixed modified soil were improved significantly. When lime content was 6% and starch ether solution was 5%, the strength of multiple-mixed modified soil was the best, and the maximum cohesion and internal friction angle were 51.1 and 3.37% higher than those of single-mixed soil, respectively. The strength and durability of the optimum modified soil were similar to or higher than those of the site soil. Thus, it is feasible and effective to use lime together with starch ether as restoration material for silty earthen sites.

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The study on engineering characteristics and compression mechanisms of typical historical earthen site soil

Cited by 17 publications

References 10 publications

Composite Nano-Calcium-Based Material for Reinforcement and Protection of Earthen Ruins in Humid Environment

Composite Nano-Calcium-Based Material for Reinforcement and Protection of Earthen Ruins in Humid Environment

Preservation of earthen relic sites against salt damages by using a sand layer

Study on Restoration Materials for Historical Silty Earthen Sites Based on Lime and Starch Ether

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