Soil Stabilization Using Rice Husk Ash and Natural Lime as an Alternative to Cutting and Filling in Road Construction

Karatai, Thomas Rukenya; Kaluli, James Wambua; Kabubo, Charles; Thiong’o, George

doi:10.1061/(asce)co.1943-7862.0001235

Cited by 52 publications

(25 citation statements)

References 8 publications

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“…Bagheri et al [11] presented the results of the consolidated undrained triaxial test and UCS test of treated silty sand soil with cement, lime, and RHA (CLR) admixture, and an increase of the effective cohesion c′ and effective friction ϕ′ was observed with increasing the CLR content, consistently, and RHA was also found to be effective in increasing the shear strength of CLR-soil mixture. Karatai et al [12] studied the RHA and natural lime as an alternative to cutting and filling in road construction, and it was found that a combination of 20% by weight of RHA and 2% by weight of natural lime improved the CBR of expansive clay soil by 800%, reduced the soil plasticity by approximately 90%, and decreased free swell by approximately 70%. Based on the studies of Liu et al [13], the results showed that when the blending ratio of RHA/lime was adopted as 4:1 by weight for soil stabilization, with increase in RHA–lime content and curing time, specific surface area of stabilized expansive soil decreased dramatically and medium particle size increased, deformation properties including swelling potential, swelling pressure, compression index, crack quantity, and fineness of expansive soil lowered remarkably; meanwhile, strength properties involving UCS, cohesion, and internal friction angle improved significantly.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Jiang

Huang

et al. 2019

Materials

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With increased awareness of environmental protection, the output of traditional curing agents such as cement and lime is less and less, so it is urgent to develop new curing agents with high efficiency and environmental benefits. Thus, this study aims at investigating the application of rice husk ash (RHA) from agricultural waste to the soft soil stabilization. A series of tests are conducted to analyze the strength development process and soil–water characteristics of rice husk ash–lime (RHA–lime) stabilized soils. The results of the strength tests showed that by increasing the content of RHA, the unconfined compressive strength (UCS) and splitting strength of stabilized soils increased first and then decreased. The effective shear strength indexes of the three soil types (soft soil, lime-stabilized soil, and RHA–lime soil) are measured and compared. It is found that RHA can effectively improve the shear resistance and water resistance of stabilized soil. The results of methylene blue test demonstrated that RHA can also promote the reduction of the specific surface area and swelling potential energy of lime-stabilized soil. In addition, the influence of RHA on mineral composition and morphology change in stabilized soils is studied at the microscopic level. The X-ray diffraction tests and scanning electron microscope (SEM) tests showed that strength development and change of soil–water properties of RHA–lime stabilized soil are attributed to enhanced cohesion by cementation and pores filling with agglomerated mineral.

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Section: Introductionmentioning

confidence: 99%

Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Jiang

Huang

et al. 2019

Materials

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“…For many, a positivistic perspective and quantitative data were arguably quite appropriate to the topic under examination. For studies that compare methods for compaction of soils (Karatai et al 2017), computer modeling of the performance of asphalt or other materials (Imran et al 2017), or the differentiation of empirical methods of schedule analysis (Ballesteros-Perez 2017), positivism provides a highly appropriate lens for the analyses undertaken. However, less than 20% of the papers focused on these types of studies, primarily in scheduling, estimating, or material-related research.…”

Section: How Are We Doing It?mentioning

confidence: 99%

Unpacking Ontological Perspectives in CEM Research: Everything Is Biased

Sherratt

Leicht

2020

J. Constr. Eng. Manage.

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Methodological debates are nothing new in construction engineering and management (CEM) research. However, when the consequences, and at times even the content, of such debates are considered, what often emerges is both a superficiality and inconsistency in the way research methodologies are understood, mobilized and used to judge the rigor and value of empirical work. CEM research seems reluctant to engage with the nature of reality, the nature of knowledge, or, at times, with any philosophy at all. This paper explores and considers the influence, or lack of influence, that ontological and epistemological positioning has on much of our CEM research, and what that indicates for the findings we generate. With an explicit focus on bias, and the approaches taken within a volume, 173 manuscripts, of the Journal of Construction Engineering and Management are examined. We argue that multimethodological perspectives on a problem should be adopted where possible, able as they are to generate more holistic understandings and more comprehensive illuminations of phenomena in practice, and thereby support the development of a more mature CEM research discipline, both in terms of academic scholarship and relevance to practice.

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“…Expansive soils are highly problematic because of their tendency to heave during wet seasons when they absorb water and shrink during dry seasons when water evaporates from them (Mishra et al, 2008 as cited in Barasa et al, 2015;Muthukumar and Phanikumar, 2015). Expansive soils are characterized by excessive compression, collapse, low shear strength, low bearing capacity, and high swell potential (Rao and Thyagara, 2007 as cited in Karatai et al, 2016). In drier seasons they can form deep cracks and expand dramatically when wet affecting their strength performance as a construction material (Tripathy et al 2002 as cited by Karatai et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Expansive soils are characterized by excessive compression, collapse, low shear strength, low bearing capacity, and high swell potential (Rao and Thyagara, 2007 as cited in Karatai et al, 2016). In drier seasons they can form deep cracks and expand dramatically when wet affecting their strength performance as a construction material (Tripathy et al 2002 as cited by Karatai et al 2016). There is therefore need for improvement of these soils.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat on the Properties of Expansive Clay Soil

2017

IJSR

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Abstract:The cost of cut to spoil of expansive soils during construction of infrastructure projects such as roads, airports, and housing estates has continued to increase due to high cost of excavation and haulage and the increasing scarcity of spoil areas due to development. Further, suitable borrow materials continue to deplete, with their locations getting further and further from the location where they would be required. The environmental consequences of cut to spoil and borrow to fill continue to soar. This has led into continuous research into suitable ways of improving and using expansive clays. Most research methods currently concentrate on attempting to stabilize these soils. The need to eliminate cut to spoil of expansive clays followed by borrowing suitable material for fill led to this research -improving the performance of expansive clays by subjecting it to high temperatures in a closed kiln to eliminate emission of greenhouse gases. This paper reports the effect of heating the expansive clay for 2 hours at a temperature of 600 0 C. The properties of the neat material were investigated which included compaction, the California Bearing Ratio (CBR), grading, atterberg limits, linear shrinkage, free swell, chemical composition and loss on ignition (LOI). The same properties were investigated for the heated expansive clay. The heating increased the maximum dry density (MDD), the CBR, altered the particle size distribution, reduced the plasticity index, the free swell and linear shrinkage hence reduction in plasticity. The properties of the expansive soil were therefore improved. It was concluded that subjecting the soil to 600 0 C makes it suitable as a fill material.

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Soil Stabilization Using Rice Husk Ash and Natural Lime as an Alternative to Cutting and Filling in Road Construction

Cited by 52 publications

References 8 publications

Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Unpacking Ontological Perspectives in CEM Research: Everything Is Biased

The Effect of Heat on the Properties of Expansive Clay Soil

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