Inicio  /  Applied Sciences  /  Vol: 14 Par: 4 (2024)  /  Artículo
ARTÍCULO
TITULO

Performance Study of Black Shale Modified Soil for Road Use Based on Eshelby?Mori?Tanaka Theory

Min Hu    
Zhangduo Huang    
Jiejin Chen    
Yipeng Guo    
Yichao Zhou    
Dashun Liu and Rong Guo    

Resumen

Black shale, as a type of soft rock, exhibits high strength when freshly exposed. However, it easily disintegrates upon contact with water, making it unsuitable for direct use in roadbed construction. Using it as discarded material not only increases construction costs but also pollutes the environment. Therefore, the reuse and modification of black shale have become particularly important. Based on the theory of composite material equivalent inclusions, this study investigates the strength and water stability characteristics of black shale gravel after being mixed with cement and compacted with clay. The results show that the strength of cemented soil increases linearly with the cement content. The water absorption properties of the modified soils with different amounts of black shale added are similar, with an average water absorption rate of about 2.53%. The strength of black shale modified soil is generally positively correlated with the cement content, although the linear correlation is not significant. The modified black shale soil used in the experiment is suitable for the subgrade of medium- and light-grade secondary roads and below. The recommended mass ratio is Mshale:Mclay:Mcement = 70:21:9. The unconfined compressive strength of the material under 7-day curing is 1.36 MPa. The relationship between the strength of modified soil, clay strength, cement content, and gravel addition has been established, clarifying the physical significance of each parameter. The ?drying and soaking? cycle can accelerate the strength degradation of modified soil. It is recommended to strengthen the construction of roadbed drainage facilities during construction to maintain a stable and dry environment for the modified soil as a roadbed filling material. The research results not only provide clear technical indicators for the reuse of discarded black shale in engineering but also serve as a basis for proportion of crushed stone discarded material as roadbed fill.

 Artículos similares

       
 
Rick Jaeger, Carolyn Jacobs, Katharina Tondera and Neil Tindale    
This study investigated different approaches to optimize flows in misaligned culverts. Structures aligned with the natural stream are always preferred, as misalignments cause a change of direction at the culvert inlet associated with lower performance an... ver más
Revista: Water

 
Jae Young Seo and Sang-Il Lee    
Drought is a complex phenomenon caused by lack of precipitation that affects water resources and human society. Groundwater drought is difficult to assess due to its complexity and the lack of spatio-temporal groundwater observations. In this study, we p... ver más
Revista: Water

 
Daniel Althoff, Lineu Neiva Rodrigues and Demetrius David da Silva    
Small reservoirs play a key role in the Brazilian savannah (Cerrado), making irrigation feasible and contributing to the economic development and social well-being of the population. A lack of information on factors, such as evaporative water loss, has a... ver más
Revista: Water

 
Bingjian Cui and Shengxian Liang    
Wastewater reuse for agricultural irrigation in many developing countries is an increasingly common practice. Regular monitoring of indicators can help to identify potential health risks; therefore, there is an urgent need to understand the presence and ... ver más
Revista: Water

 
Peter Jarvis, Olivier Autin, Emma H. Goslan and Francis Hassard    
Ultraviolet light-emitting diodes (UV-LEDs) have recently emerged as a viable technology for water disinfection. However, the performance of the technology in full-scale drinking-water treatment systems remains poorly characterised. Furthermore, current ... ver más
Revista: Water