Cumulative Deformation Behavior of Coarse-Grained Red Mudstone Soil under Cyclic LoadingSource: International Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 011::page 04024245-1DOI: 10.1061/IJGNAI.GMENG-9755Publisher: American Society of Civil Engineers
Abstract: Red mudstone is a problematic soil that is easily subjected to weathering, disintegrating, and swelling. In this study, a series of large-scale cyclic triaxial tests were performed to investigate the cumulative deformation behavior of red mudstone clay mixed with weathered red mudstone gravel as an improved coarse-grained red mudstone soil (IRMS). The influences of compaction moisture content and confining pressure were investigated. The cyclic loading was applied from 25 to 225 kPa with an increment of 25 kPa and 1,000 or 2,000 cycles for each stage at a frequency of 2 Hz. The experimental results indicate that the strains at the onset of failure are approximately 1% for the optimal moisture content (OMC) with the number of cycles N = 14,000–16,000, and the strains are approximately 1% for the moisture content 2% dry of OMC with N = 12,000–14,000, while the strains exceed 10% for the moisture content 2% wet of OMC with N = 3,000–4,000. The cumulative strain decreases with increasing confining pressure from 20 to 50 kPa, but the influence becomes more significant under higher dynamic stress. A prediction model is proposed for the evolution of cumulative strain under cyclic loading. The IRMS could be used as a construction material for railway subgrade with proper control of field compaction moisture content.
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contributor author | Hua Xu | |
contributor author | Futang Zhao | |
contributor author | Yao Hu | |
contributor author | Feng Gao | |
contributor author | Yewei Zheng | |
date accessioned | 2025-04-20T10:14:15Z | |
date available | 2025-04-20T10:14:15Z | |
date copyright | 8/23/2024 12:00:00 AM | |
date issued | 2024 | |
identifier other | IJGNAI.GMENG-9755.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4304281 | |
description abstract | Red mudstone is a problematic soil that is easily subjected to weathering, disintegrating, and swelling. In this study, a series of large-scale cyclic triaxial tests were performed to investigate the cumulative deformation behavior of red mudstone clay mixed with weathered red mudstone gravel as an improved coarse-grained red mudstone soil (IRMS). The influences of compaction moisture content and confining pressure were investigated. The cyclic loading was applied from 25 to 225 kPa with an increment of 25 kPa and 1,000 or 2,000 cycles for each stage at a frequency of 2 Hz. The experimental results indicate that the strains at the onset of failure are approximately 1% for the optimal moisture content (OMC) with the number of cycles N = 14,000–16,000, and the strains are approximately 1% for the moisture content 2% dry of OMC with N = 12,000–14,000, while the strains exceed 10% for the moisture content 2% wet of OMC with N = 3,000–4,000. The cumulative strain decreases with increasing confining pressure from 20 to 50 kPa, but the influence becomes more significant under higher dynamic stress. A prediction model is proposed for the evolution of cumulative strain under cyclic loading. The IRMS could be used as a construction material for railway subgrade with proper control of field compaction moisture content. | |
publisher | American Society of Civil Engineers | |
title | Cumulative Deformation Behavior of Coarse-Grained Red Mudstone Soil under Cyclic Loading | |
type | Journal Article | |
journal volume | 24 | |
journal issue | 11 | |
journal title | International Journal of Geomechanics | |
identifier doi | 10.1061/IJGNAI.GMENG-9755 | |
journal fristpage | 04024245-1 | |
journal lastpage | 04024245-12 | |
page | 12 | |
tree | International Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 011 | |
contenttype | Fulltext |