Experimental investigation on relative contribution of hot and humid weather and heavy rainfall in disintegration of basalt residual soil

Zhang, Xianwei; Kong, Lingwei; Chen, Cheng; Yin, Song

doi:10.1360/n092016-00156

Cited by 8 publications

(8 citation statements)

References 9 publications

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“…Then, the wire mesh frame was hung on the electronic balance, and the sample was quickly immersed in the glass cylinder. It was necessary that the depth of water be about 1 cm higher than the surface of the soil sample [47,48]. We set the immersion depth to 1 cm for the following reasons.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Disintegration Resistance of Steep-Rocky-Slope Wall-Hanging Soil Based on High-Performance Ester Materials

2022

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Ecological restoration is difficult on the steep rocky slopes (SRS) in rainy areas in South China that experience severe soil erosion. The disintegration resistance of steep-rocky-slope wall-hanging soil (SRSWS) is a crucial topic in the field of new ecological restoration. The formation of a transient saturated zone of wall-hanging soil (WS) under high-intensity rainfall can easily lead to soil disintegration. The subsequent rain erosion can cause the loss of growth substrate required for early plants, resulting in a poor greening effect or even landslides. Therefore, improving the disintegration resistance of WS and ensuring the stability of the early-plant-growth environment are at the core of SRS protection. In this paper, structural and static underwater disintegration tests of red soil modified by high-performance ester materials (HEMs) were carried out. According to the damage ratio of the soil structure and the disintegration rate and disintegration amount of red soil, the structural properties and disintegration resistance of improved red soil were quantitatively measured. The results show that absorbent HEMs generally increased the content of water-stable aggregates (WAs) in red soil. However, when the content was excessively large, it destroyed the WAs and accelerated the overall disintegration rate and amount. Based on the structure and disintegration resistance test of red soil, optimal pro-portions of adhesive HEMs of 10 g·m−3 and absorbent HEMs of 80 g·m−3 were obtained. The optimal proportions obtained from the above experiments showed good adaptability and an improvement effect on the structural properties and disintegration resistance of red soil. This solves the problem of the growth substrate required for early plant disintegration and loss in water. This paper provides a theoretical and experimental basis for the ecological restoration of SRSWS with disintegration resistance. It has guiding significance for the steady progress of greening construction on SRS sites.

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Section: Test Results and Discussionmentioning

confidence: 99%

Disintegration Resistance of Steep-Rocky-Slope Wall-Hanging Soil Based on High-Performance Ester Materials

2022

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“…The sample is directly placed in water for disintegration. The disintegration curve is shown in Figure 1, the test specific operation process details can be found in [9]. The sample is finally completely disintegrated, but the paper needs to study the changes in the sample during the rapid infiltration process in the initial stage.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…From the microscopic point of view, Zhang [8] analyzed the force analysis of the soil particles in granite residual soil, and initially obtained the relationship between the average rate of stable disintegration stage and effective voids and matric suction. Zhang [9] conducted a disintegration test on basalt residual soil and analyzed the impact of climate.…”

Section: Introductionmentioning

confidence: 99%

X-ray Microscopic Study on Disintegration of Granite Residual Soil

Kong

Ai-guo

et al. 2019

E3S Web Conf.

Self Cite

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In order to study the evolution of cracks in the initial disintegration process of granite residual soil, this study used CT scanner to scan the sample before and after 60s disintegration. Internal cracks are statistically analyzed by 3D reconstruction techniques. The initial crack content of granite residual soil is 0.8%, and it increases to 8.1% after 60s disintegration. Internal cracks of the sample are transformed into complex connected cracks, and there are many large pores formed by erosion and presented as complex geometry shape. The geometry of cracks is analyzed from three aspects: width, length and bending ratio. It is found that cracks have strong linear characteristics after 60s disintegration, which may be related to the initial rapid infiltration damage.

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“…At a certain temperature, with an increase in the number of unsaturated-saturated cycles, the damage variable on saturated granite residual soil gradually increases at first and then becomes stable. Zhang and Kong (2016) believed that repeated dry-wet alternation caused by high temperatures and humid climates would destroy particle agglomeration and enhance the dispersion of soil [54]. In their study, the disintegration rate increased with the increase in the number of dry-wet cycles, and the disintegration was dominated by coarse particles and gradually changed to fine particles.…”

Section: Temperaturementioning

confidence: 96%

Relationship between Disintegration Characteristics and Intergranular Suction in Red Soil

Tang

Xie

2022

Sustainability

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Red soil is widely distributed in South America, Africa and Southeast Asia (approximately between the 30° S and 30° N latitudes). These soils are typically formed by the weathering of carbonate or other rocks rich in iron and aluminium oxides in hot-humid climates and susceptible to a large reduction in disintegration upon wetting or other conditions. This paper provides a state-of-the-art review on the red soil disintegration mechanism and intergranular suction with reference to red soil. The present paper reviews the research progress that has been made regarding the disintegration characteristics and testing methods of the intergranular suction of red soil, including (1) influencing factors of disintegration and the mechanism of action, (2) advantages and disadvantages of each intergranular suction testing method and (3) the intrinsic relationship between disintegration and intergranular suction. The study indicated that the research on the disintegration mechanism of red soil is still in the macro stage, involving the different moisture contents, temperatures and other directly influential conditions. Soil disintegration characteristics have not been extensively analysed from the micro perspective (including pore structure and distribution, fracture development degree and particle arrangements). When these problems are solved, disintegration studies of red soil will be advanced. Some limitations of the previous research are highlighted at the end of the paper, and suggestions are made for future research.

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Experimental investigation on relative contribution of hot and humid weather and heavy rainfall in disintegration of basalt residual soil

Cited by 8 publications

References 9 publications

Disintegration Resistance of Steep-Rocky-Slope Wall-Hanging Soil Based on High-Performance Ester Materials

Disintegration Resistance of Steep-Rocky-Slope Wall-Hanging Soil Based on High-Performance Ester Materials

X-ray Microscopic Study on Disintegration of Granite Residual Soil

Relationship between Disintegration Characteristics and Intergranular Suction in Red Soil

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