Experimental Research on the Grow of Q3 Loess Micro-Fissures by CT Scanning
Year: 2025
Type: book-chapter
Abstract: Loess is a soil with a special structure, and its structure index reflects the characteristics of the initial structure of loess. With the increase of content, dry density, minimum density, plasticity index and liquidity index, the structure shows a downward trend. Through CT collapsibility triaxial apparatus, the upper, middle and lower of the loess are scanned under the condition of controlling suction, and the immersion collapsibility characteristics of the original Q3 loess are tested. The results of the study that through the ash analysis of the loess samples, the process of “pore growth-fissure penetration-strength deterioration” of the loess samples is revealed. The pores and micro-fissures are the core of the reduction of loess strength, and the quantitative relationship and law are summarized. The linkage of pores and micro-issuers, the equivalent diameter of pores is positively correlated with the width of micro-fissures. Pore connectivity is positively correlated with micro-fissure penetration. The pore-strength, unconfined compressive strength is negatively correlated with the proportion of large pores, that is, the larger pores, the lower the strength.
DOI: 10.3233/atde251287
Author: Xiaojun Yin
Institution: Jiaying University
Language: English
Topic: Soil and Unsaturated Flow
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4416575331