Determination of strength characteristics of natural and stabilized alluvial subgrades

Malikzada, Abdulmuner; Arslan, Eylem; Develioğlu, İnci; Pulat, Hasan Fırat

doi:10.1007/s12517-022-09829-2

Cited by 3 publications

(3 citation statements)

References 54 publications

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“…The thermal power plant fly ash received from Soma Power Plant, Manisa, Turkey was used in this study. The chemical composition of the fly ash was determined through X-ray fluorescence (XRF) analysis by Malikzada et al [13] and it is presented in Table 1.…”

Section: Materials and Testingmentioning

confidence: 99%

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Improvement of Strength Characteristics of a Highly Plastic Expansive Soil with Fly Ash

KODAZ

Demirci

Pulat

2022

Sakarya University Journal of Science

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Highly plastic expansive clays swell or shrink due to change in moisture content and they often have very low bearing capacity. Construction of engineering structures particularly pavements and lightweight buildings on problematic soils such as highly plastic expansive clays may create severe structural problems due to poor engineering properties of that kind of soil. This study focused on the effects of fly ash on strength characteristics of highly expansive clays which are problematic soils due to their undesirable engineering properties such as high liquid limit, plasticity index, swelling and shrinkage characteristics, and low bearing capacity. Atterberg’s limit tests and hydrometer tests were conducted to obtain consistency limits and grain-size distribution of the highly plastic expansive clay. Standard proctor tests for clay samples with various fly ash contents such as 10%, 15%, and 20% were performed to determine maximum dry densities and optimum water contents of the mixtures of clay and fly ash. The clay and fly ash mixtures at maximum dry density and optimum water content were prepared for unconfined compression and California Bearing Ratio (CBR) tests. Effects of fly ash content on the strength characteristics of a highly plastic expansive clay were investigated through unconfined compression and CBR tests. The experiment results show that fly ash is a promising additive to improve strength characteristics of highly plastic expansive clays. Addition of 20% fly ash into the clay mixture in weight results in an approximately 66% increase in unconfined compression strength and CBR values of the clay mixture.

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Section: Materials and Testingmentioning

confidence: 99%

“…Table 1 Chemical composition of thermal power plant fly ash [13]. Considering ASTM C618-12a [14], the fly ash used in this study can be considered as Class C type fly ash.…”

Section: Materials and Testingmentioning

confidence: 99%

Improvement of Strength Characteristics of a Highly Plastic Expansive Soil with Fly Ash

KODAZ

Demirci

Pulat

2022

Sakarya University Journal of Science

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“…However, the effects from different pH in various soil types are also important: strength increases with a higher pH [38,39]. Finally, the important parameter is the mineralogy and structure of soil: finegrained, medium-grained or coarse-grained [40].…”

Section: Introductionmentioning

confidence: 99%

Simplex Lattice Design and X-ray Diffraction for Analysis of Soil Structure: A Case of Cement-Stabilised Compacted Tills Reinforced with Steel Slag and Slaked Lime

Lindh

Lemenkova

2022

Electronics

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Evaluating the structure of soil prior to building construction is valuable in a large variety of geotechnical and civil engineering applications. To built an effective framework for assessing the strength of the stabilised soil, the presented workflow includes a complex approach of simplex lattice design and X-ray diffraction for the analysis of soil structure. Different from the traditional in situ measurements, we propose a statistical framework for effective decision-making on binder combination to stabilise soil collected in three localities of Southern Sweden—Bromölla Municipality (Skåne County), Petersborg (Östergötland County) and Örebro (Örebro County). A practical solution is presented that includes the evaluation of strength properties of various types of soil using ordinary Portland cement (OPC), slaked lime and steel slag as pure agents and blended binders. The specimens were collected in Southern Sweden and included sandy silty tills and clay till (clay content 6–18%). The preprocessing included the mineralogical analysis of mineral composition and soil structure by X-ray diffraction (XRD) and a sieve. The soil samples were fabricated, compacted, rammed, stabilised by six binder blends and assessed for uniaxial compressive strength (UCS). The moisture condition value (MCV) and water content tests were done for compacted soil and showed variation in the MCV values for different binders. The study determined the effects from binder blends on the UCS gain in three types of soil, measured on days 7, 28 and 90. Positive effects were noted from the steel slag/lime blends on the UCS gain in sandy silty tills. A steel slag/slaked lime mixed binder performed better compared to the pure binders. The effectiveness of the simplex lattice design was demonstrated in a series of ternary diagrams showing soil strength evaluated by adding the stabilising agents in different proportions.

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Stabilization of alluvial soil with fly ash and GGBS as a subgrade for pavement construction

Koundinya,

Rahul

2023

E3S Web Conf.

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With the significant increase of construction activities in the road sector, the scenario has awakened the need for typical good quality soils for subgrade construction which are deficient in supply at many locations for numerous reasons. In this research activity, comprehensive study in the laboratory has been carried out to examine the use of fly ash and GGBS (Ground Granulated Blast Furnace Slag) to stabilize alluvial soils. Multiple influential properties such as UCS, CBR, Permeability, swelling potential, Compaction characteristics, and Atterberg limits were found for control samples and compared with the samples of distinct sequences of different percentages of Fly ash and GGBS ratio and on different curing periods. All the tests are performed by varying the Fly ash content to 5%,15%,25%,35% and 45% while keeping the GGBS content constant at 5% to the weight of dry soil. There is a remarkable change in the shear strength of the soil as the UCS value increased by 150% and the CBR value increased by 389% when the control sample is compared with those of treated samples with 35% Flyash+5% GGBS

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Determination of strength characteristics of natural and stabilized alluvial subgrades

Cited by 3 publications

References 54 publications

Improvement of Strength Characteristics of a Highly Plastic Expansive Soil with Fly Ash

Improvement of Strength Characteristics of a Highly Plastic Expansive Soil with Fly Ash

Simplex Lattice Design and X-ray Diffraction for Analysis of Soil Structure: A Case of Cement-Stabilised Compacted Tills Reinforced with Steel Slag and Slaked Lime

Stabilization of alluvial soil with fly ash and GGBS as a subgrade for pavement construction

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