Stabilization of compacted clay with cement and/or lime containing peat ash

Mousavi, Seyed Esmaeil

doi:10.1080/14680629.2016.1212729

Cited by 19 publications

(6 citation statements)

References 24 publications

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“…The same with (OPC), the peak strength is reached at 1.5% and gives the maximum strength at (2279 kK/m 3 ), and then it decreases with a slight slope by increasing cement content. The role of cement here is to make the pore volume decrease and increase the compactness [44]. Mousavi (2017) studied that the cement crystals occupy the empty spaces of the soil (hydration) to provide hardening in the stabilized soil.…”

Section: Compaction Energy Effect On Stabilized Soilmentioning

confidence: 99%

Influence of Compaction Energy on Cement Stabilized Soil for Road Construction

et al. 2022

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Compactness is an important feature to ensure subgrade stability where temperature and water infiltration exist in semi-arid areas. Chemical soil stabilization can improve soil properties. This research studies the impact of compaction energy on stabilized subgrade soil and how to improve its geotechnical characteristics in the experimental tests on both unstabilized and stabilized soil samples by adding ordinary Portland cement and sulfate-resistant cement, in percentages by the soil's weight, in order of identification and classification, to the strength properties tests: compaction at multiple energies, CBR, and UCS. A test protocol was followed to assess the relationship between cement soil treatment, mechanical characteristics, and compaction parameters at different energy levels. Findings show that the higher UCS values were recorded with an increase in compaction energy. The MDD of cement stabilized soil increases as compaction energy increases, whereas the OMC decreases, the UCS improves, and the CBR increases. These improvements have a positive influence on the performance of soil used as a subgrade. The combination of cement stabilization and a high compaction level for subgrades using weak soil can improve strength parameters throughout any phase of earthwork construction design that leads to strengthening subgrades, reducing the thickness, and, as a result, low construction cost. Doi: 10.28991/CEJ-2022-08-03-012 Full Text: PDF

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Section: Compaction Energy Effect On Stabilized Soilmentioning

confidence: 99%

Influence of Compaction Energy on Cement Stabilized Soil for Road Construction

et al. 2022

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“…Scanning electron microscopy is generally widely used in biology, physics, and chemistry [17][18][19]. Due to the advantages of scanning electron microscopy in observing the microstructure of samples, domestic and foreign experts have cited this technology in various fields of geotechnical engineering [20][21][22][23][24]. After the freeze-thaw cycle, the flat surface of the sample is selected as the scanning observation surface.…”

Section: Semmentioning

confidence: 99%

The Influence of Regional Freeze–Thaw Cycles on Loess Landslides: Analysis of Strength Deterioration of Loess with Changes in Pore Structure

Yang

Liu

2020

Water

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The loess landslide in Gaoling District of Xi’an, Shaanxi in China is closely related to the seasonal freeze–thaw cycle, which is manifested by the destruction of pore structure and strength deterioration of the loess body under freeze–thaw conditions. In order to study the relationship between macro-strength damage and pore structure deterioration of saturated loess under freeze–thaw conditions and its influence on the stability of landslides, this paper explores the effect of freeze–thaw cycles on the strength of saturated undisturbed loess through triaxial compression test, and explores the micro-microstructure changes of saturated undisturbed loess through scanning electron microscopy (SEM) and nuclear magnetic resonance (NMR). This is to analyze the evolution of the pore structure and strength loss evolution of saturated loess during the freeze–thaw process, and to describe the freeze–thaw damage of saturated undisturbed loess through the change of porosity and strength deterioration. Then, the internal correlation expression between the porosity change and the strength degradation is established to realize the verification analysis of the test data based on the correlation model. The research results show that: (1) As the number of freeze–thaw cycles increases, the peak strength loss rate gradually increases, and the strength deterioration of saturated loess becomes more and more obvious. (2) The freeze–thaw cycle will lead to the development of pores and cracks in the sample, accompanied by the generation of new cracks, which will cause the deterioration of the pore structure of the sample as a whole. (3) The response of strength damage and porosity deterioration of saturated undisturbed loess is roughly similar under the freeze–thaw cycle. The change in porosity can be measured to better reflect the strength deterioration of saturated loess. Therefore, the change of pore structure of undisturbed loess under freeze–thaw cycle conditions is tested by field sampling and indoor tests to reflect the phenomenon of strength deterioration, thereby analyzing the stability of loess slopes.

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“…The stabilizing agents are mixed with the natural soil to improve soil strength as these stabilizing agents provide the benefits of bonding the particles of soil, removing excess water from the pores of soil, and filling the empty voids in the soil. The improvement rate depends on the mineral composition of the soil, type and the number of exchangeable cations, and the curing time [21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Soil Improvementmentioning

confidence: 99%

Improvement of Geotechnical Properties of Cohesive Soil Using Crushed Concrete

Karkush

Yassin

2019

Civ Eng J

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Some natural resources such as gravel are not renewable, therefore, it is necessary to reduce the use of such resources and replace them with other recycled, economic, and environmentally friendly materials. Recycled crushed concrete aggregates demolished from old buildings and blocks of waste concrete can be used to replace the natural aggregates. The present study focused on using recycled crushed concrete in improvement the chemical and geotechnical properties of soft soil having undrained shear strength of 6.78 kPa. The soft soil samples were mixed with 5, 10, and 15% of crushed concrete. The blocks of waste concrete are grinded by mills to get crushed concrete which passing sieve no. 4. Such aggregates are lighter than natural aggregates and provide a good deformation modulus when mixed with soil. In Iraq, there are hundred thousand tons of concrete blocks used as fences and now considered wastes after removing these security fences, so it’s important to interest from recycling of such materials to be used in the improvement wide region of soft soils in Iraq. The results of tests showed increasing the undrained shear strength of soft soil by 175-193.5% and reduced the compressibility of soft by 25-31% measured in terms of compression index.

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Stabilization of compacted clay with cement and/or lime containing peat ash

Cited by 19 publications

References 24 publications

Influence of Compaction Energy on Cement Stabilized Soil for Road Construction

Influence of Compaction Energy on Cement Stabilized Soil for Road Construction

The Influence of Regional Freeze–Thaw Cycles on Loess Landslides: Analysis of Strength Deterioration of Loess with Changes in Pore Structure

Improvement of Geotechnical Properties of Cohesive Soil Using Crushed Concrete

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