Small-Strain Shear Modulus and Strength Characteristics of Clayey Soil Treated with Nano-SiO2 and Fly Ash

Munda, Jayanti; Ram, Amit Kumar; Mohanty, Supriya

doi:10.1007/s40999-023-00857-x

Cited by 2 publications

(1 citation statement)

References 61 publications

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“…It can be seen that the shear strength of the cemented specimen modified by nanocomposite fibers decreased with the increase in shear angle and increased with the increase in curing age [50]. When the shear angle is taken as the x-axis and the curing age as the y-axis, the shear strength surface equations of (b), (c), and (d) can be obtained through surface fitting as follows:…”

Section: Influence Of Curing Age On Shear Strength Of Specimensmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Coal-Based Solid Waste Nanocomposite Fiber Cementitious Backfill Material

et al. 2023

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Previous studies have shown that coal-based solid waste can be utilized in combination with cement, silica fume, and other modified materials to create a cemented backfill material. However, traditional cemented backfill materials have poor mechanical properties, which may induce the emergence of mining pressure and trigger dynamic disaster under complex mining conditions. In this study, the nanocomposite fiber was used to modify the traditional cemented backfill materials and a new cemented backfill material was developed using coal-based solid waste, nanocomposite fiber and other materials. Specifically, coal gangue, fly ash, cement, and glass fibers were used as the basic materials, different mass fractions of nano-SiO2 were used to prepare cemented backfill materials, and the mechanical enhancement effect of the compressive strength, tensile strength, and shear strength of the modified materials was analyzed. The results show that when the nano-SiO2 dosage is 1%, the optimal compressive strength of the specimens at the curing age of 7 d can be obtained compared with cemented materials without nano-SiO2, and the compressive strength of the modified specimens raises by 84%; when the nano-SiO2 dosage is 1%, the optimal tensile strength and shear strengths of the modified specimens can be obtained at the curing age of 28 d, increasing by 82% and 142%. The results reveal that nanocomposite fibers can be used as additives to change the mechanical properties of cemented backfill materials made using coal-based solid waste. This study provides a reference for the disposal of coal-based solid waste and the enhancement of the mechanical properties of cemented backfill materials.

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Section: Influence Of Curing Age On Shear Strength Of Specimensmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Coal-Based Solid Waste Nanocomposite Fiber Cementitious Backfill Material

et al. 2023

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Gypsum and rice husk ash for sustainable stabilization of forest road subgrade

Sharifi Teshnizi,

Mirzababaei,

Karimiazar

et al. 2023

QJEGH

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Forest roads are crucial for economic development and resource accessibility, especially in regions with extensive wood demand driven by construction growth. These roads require consistent maintenance to prevent structural issues, even though they experience lower traffic. Traditionally, gypsum has been used for soil stabilization due to its cation exchange capability with clay minerals and flocculation properties. However, its water solubility in wet conditions necessitates innovative solutions. This study explores a novel approach by combining gypsum with rice husk ash (RHA), an abundant agricultural waste, to address the challenges posed by expansive and low-bearing clay soils in forest road construction. In this study, an expansive soil with high plasticity and swelling potential is treated with varying combinations of RHA (5%-20%) and gypsum (2%-6%), followed by curing for 7, 15, and 30 days. Mechanical property tests revealed reduced plasticity and swelling pressure, alongside increased unconfined compressive strength. Microscopic analysis illustrated the formation of a calcium silicate hydrate (CSH) gel and Calcium Alumino Silicate Hydrate (CAH) gel, which possibly contributes to improved stability. This research underscores the potential of sustainable soil stabilization using gypsum and RHA synergy to fortify forest roads against expansive clay soil challenges, promoting eco-friendly and resilient infrastructure solutions.

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Small-Strain Shear Modulus and Strength Characteristics of Clayey Soil Treated with Nano-SiO2 and Fly Ash

Cited by 2 publications

References 61 publications

Experimental Study on Mechanical Properties of Coal-Based Solid Waste Nanocomposite Fiber Cementitious Backfill Material

Experimental Study on Mechanical Properties of Coal-Based Solid Waste Nanocomposite Fiber Cementitious Backfill Material

Gypsum and rice husk ash for sustainable stabilization of forest road subgrade

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