Experimental study on potential suitability of natural lime and waste ceramic dust in modifying properties of highly plastic clay

Negesa, Adamu Beyene; Tesfaye, Yada; Tsige, Damtew; Sorsa, Alemineh; Wedajo, Teyba; Tesema, Narobika; Mekuria, Getnet

doi:10.1016/j.heliyon.2022.e10993

Cited by 13 publications

(3 citation statements)

References 22 publications

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“…Tis might be in the form of improper gradation or poor abrasion resistance [55][56][57][58]. Te use of marginal or substandard crushed aggregate for asphalt mix impairs functional signifcance of the pavement [57][58][59][60][61][62][63][64].…”

Section: Materials Usedmentioning

confidence: 99%

Combined Performance of Polyethylene Terephthalate Waste Plastic Polymer and Crumb Rubber in Modifying Properties of Hot Mix Asphalt

Alemu

Melese

Mahdi

et al. 2023

Advances in Materials Science and Engineering

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Nowadays, the use of recycled waste materials in road pavement is regarded not only as a positive option in terms of sustainability but also as an appealing option in terms of providing improved service performance. The current study aimed at evaluating the performance of crumb rubber and polyethylene terephthalate plastic polymer in asphalt mixture in modifying the mechanical properties of asphalt pavement. Experimental tests were carried out both for asphalt binder and asphalt mixture. Different proportions of mix for crumb rubber and polyethylene terephthalate plastic polymer were used to systematically investigate the effect of mix ratio on performance of the asphalt material. The experimental analysis reveals that the combined application of 10% by weight of crumb rubber chips and 2% polyethylene terephthalate plastic polymer are the ideal mix ratios found effective in modifying properties of the asphalt mixture. The asphalt binder test results indicate that adding 10% crumb rubber to asphalt binder reduced penetration by 1.56% along with increment of the softening point by 4.33%. Furthermore, the indicated optimum mix amount resulted in 0.17% rise, 20.07% drop, and 20.71% increase in Marshal stability, flow, and stiffness, respectively. Besides, tensile strength of the asphalt mixture was enhanced with addition of the filler and binder materials. It was witnessed that the combined application of the additives performs better than their separate use in modifying properties of the asphalt mix.

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Section: Materials Usedmentioning

confidence: 99%

Combined Performance of Polyethylene Terephthalate Waste Plastic Polymer and Crumb Rubber in Modifying Properties of Hot Mix Asphalt

Alemu

Melese

Mahdi

et al. 2023

Advances in Materials Science and Engineering

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“…Clayey ground underlying road embankments commonly experiences a long-lasting deformation that takes considerable duration of time for the consolidation process to be fully accomplished [1]. Upon placement of external loading, the excess pore pressure begins to rise which is a typical characteristic of clayey foundations [2]. Clay soil is typically known for its poor workability, in which embankment loads result in bearing failure and excessive deformation after construction [3].…”

Section: Introductionmentioning

confidence: 99%

Consolidation Attributes and Deformation Response of Soft Clay Reinforced with Vertical Scoria Drains under Road Embankment

Gebretsadik

Melese

Negesa

2023

Advances in Materials Science and Engineering

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Application of vertical drains in soft clay soils is a common practice widely known to facilitate the consolidation rate. To overcome the adverse impact of a long-lasting consolidation process, highly permeable materials such as sand and crushed aggregates are used as drains. However, limited information exists regarding the applicability of scoria gravel as a vertical drain that no concisely documented information is observed in the literature. This study hence aimed at investigating suitability of scoria as a vertical drain in perpetuating the consolidation process of soft clay under highway embankment. Finite element-based numerical simulation was used to model the drain. The model was carried out by using 3D version of Plaxis software. In order to incorporate the effect of gradual load increment on the consolidation rate, the staged construction approach was employed. Both the square and triangular installation patterns were considered in the model in order to explore the critical effects of the drain installation pattern on the rate of consolidation. The numerical analysis also included varying dimensions of the vertical drain so as to investigate the effects of the dimension parameters of the vertically installed scoria drains. The conducted numerical analysis revealed that the rate of consolidation was considerably accelerated with provision of a group of scoria drains. With increase in the diameter of the drain, the consolidation rate increases, whereas the consolidation rate is inversely related to increase in drain spacing. For the drain installed at a spacing of 2 m, a diameter of 0.4 m, and a length of 8 m any arbitrary settlement magnitude is achieved 25 days earlier than the case without drains. Besides, incorporation of scoria drains lessens the pore pressure developed. The comparative analysis conducted on the effect of drain arrangement revealed that no considerable difference was witnessed in the performance of the square and triangular installation patterns even though the consolidation rate remains slightly faster in the case of the triangular installation pattern.

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“…Therefore, clayey soils are totally or partially removed via excavation up to a certain depth from the ground surface. Removal of unsuitable clayey soil through excavation is however practically not feasible from cost perspective in case massive and tick clay deposit is encountered [7,8]. Hence, implementation of any viable stabilization method to improve the engineering performance of unsuitable clay is better alternative to proceed with construction of structures without worrying about settlement and bearing capacity related failures.…”

Section: Introductionmentioning

confidence: 99%

Insight on Effect of Scoria Gradation on Load Bearing Resistance and Hydraulic Conductivity of Weak Clayey Subgrade

Beyene,

Tsegaye,

Tamirat

et al. 2023

Advances in Transdisciplinary Engineering

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The improvements achieved in the engineering properties of weak clayey soil are a function of various influencing agents, among which the gradation of stabilizers is one. In this study, the impact of variation in scoria gradation on the compaction characteristics, strength properties, and hydraulic conductivity of clayey subgrade was investigated. Four different gradations of volcanic scoria (well-graded, gap-graded, uniformly graded gravel-sized, and uniformly graded sand-sized scoria) were considered for the experimental investigation. Samples of clay soil were tested for compaction characteristics, California bearing ratio, and hydraulic conductivity before and after treatment for each gradation. Finding of the study revealed that the gradation of scoria as a stabilizing material has a considerable influence on the strength, compaction characteristics and permeability of the clay. The uniformly graded sand-sized scoria was found to be the gradation type with the highest performance in modifying the California bearing ratio and maximum dry density of the clayey subgrade. In contrast, the least performing gradation of scoria was the gap-graded one for all considered mix ratios. With regard to permeability, the highest degree of improvement in hydraulic conductivity of the clay was obtained when uniformly graded gravel-sized samples are blended with the weak clay.

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Experimental study on potential suitability of natural lime and waste ceramic dust in modifying properties of highly plastic clay

Cited by 13 publications

References 22 publications

Combined Performance of Polyethylene Terephthalate Waste Plastic Polymer and Crumb Rubber in Modifying Properties of Hot Mix Asphalt

Combined Performance of Polyethylene Terephthalate Waste Plastic Polymer and Crumb Rubber in Modifying Properties of Hot Mix Asphalt

Consolidation Attributes and Deformation Response of Soft Clay Reinforced with Vertical Scoria Drains under Road Embankment

Insight on Effect of Scoria Gradation on Load Bearing Resistance and Hydraulic Conductivity of Weak Clayey Subgrade

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