Skip to main content

Fines Content and Cohesion of Lateritic Soils: Conceptual Models | Chapter 01 | Advances in Applied Science and Technology Vol. 5

Laterite has been widely defined  as  a highly weathered material, rich  in  secondary oxides  of iron, aluminium, or both. It is void or nearly void of basic primary silicates, but it may contain large amounts of quartz and kaolinite. A distinctive feature of laterite and lateritic soils is the higher proportion of sesquioxides of iron and/or aluminium relative to the other chemical components. This study proposed conceptual models for the determination of soil cohesion based on the correlations of soil cohesion with fines  content.  This was with a  view to contributing to timely,  less laborious and cost  effective determination of cohesion of lateritic soils. Selected lateritic soil samples were subjected to laboratory analyses. The fines were separated from the coarse component of the soils after which the samples were remoulded in varying ratios (fines: coarse) from 10:90 to 100:0 in 10% increment. The samples were  then  subjected  to  an  unconsolidated-undrained  triaxial  test  to  determine  the  shear  strength parameters. Quantitative relationships between fines content and cohesion of the soil samples were developed. It was found that the cohesion of the soil samples generally increased with an increase in fines  content;  the  polynomial  relationships  gave  the  best  fitting  between  the  fines  content  and cohesion of the soil samples. From the findings of this research work, thefollowing conclusions are made  in  relation  to  the  objectives  of  the  research:  (i)  The  cohesion  of  the  studied  soil  samples generally increased with an increase in fines content; (ii) the best fitting between the fines content and cohesion of the soil samples. The results are valid within the study area, the tested materials and the procedure  outlined  in  this  paper.  It  is  recommended  to  perform  more  experiments  to  validate  the finding in this research.

Author(s) Details

Lecturer at the Department of Civil Engineering, Faculty of Technology, Obafemi Awolowo University, Ile-Ife, Nigeria


Popular posts from this blog

Use of the Arrhenius Equation in Kinetic Analyses and Mathematical Modeling of Rate Data Requires the Most Precise, Even Scrupulous, Application and Term Definitions | Chapter 6 | Theory and Applications of Chemistry Vol. 2

This article presents a critical analysis of the frequent practice of using the Arrhenius equation for mathematical modeling of very many physical and chemical rate processes. This approach may also be used to characterize the controls and mechanisms of the rate processes investigated. We also discuss  the  specific  form  of  the Arrhenius-type  equation  as  a  relationship  meriting  detailed investigations. In our opinion, the use of the Arrhenius relationship often can only approximate to the behavior of such systems, exemplified by the systems discussed below, including the work of N N Semenov, A K Galwey, A G Mershanov, etc. We draw attention to "erroneous" experimental designs, including the so-called "global kinetic mechanism" and other widespread uses of theoretical models which do not necessarily represent the real situation. Such limitations in rate data analyses impact negatively throughout this branch of science. Here we attempt to question these ac

A Brief Study of Middleware Technologies: Programming Applications and Management Systems | Chapter 15 | Novel Research Aspects in Mathematical and Computer Science Vol. 1

  Many platforms, services, applications, hardware, and operating systems are connected through the middleware layer. Because the middleware layer abstracts much low-level complexity and makes applications and software systems portable, it allows disparate systems to interface and function together in harmony. Middleware technologies enable software engineers to swiftly construct software systems and applications, allowing developers to focus on more important tasks. This chapter examines several types of middleware systems and discusses middleware capabilities, middleware operation, middleware's function in cloud-based systems, and the best middleware platforms to use. Middleware systems are widely utilised and can be found in practically any software system or application. Middleware programmes provide as a link between many sorts of systems and protocols. They serve as a mechanism for various systems. To successfully exchange information, it runs on a variety of operating system

A Facility-based Assessment of Internalized Stigma among Patients with Severe Mental Illnesses in Maiduguri, North-Eastern Nigeria | Chapter 05 | Emerging Research in Medical Sciences Vol. 3

Introduction: Public stigmatization of mental illnesses might lead to the internalization of the stigma by persons with mental illness (PWMIs) which might also lead to erosion of self-esteem and negative consequences on treatment outcome. This study assessed the prevalence of internalized stigma and analyzed its socio-demographic and clinical predictors among PWMIs in a sub-Saharan African mental health facility. Methods: Patients with schizophrenia, bipolar disorder and severe depression (n = 370) were randomly interviewed at the out-patient department of the Federal Neuropsychiatric Hospital, Maiduguri. They completed the sociodemographic and clinical proformata, Oslo social support scale, and an adapted version of the internalized stigma of mental illness scale (ISMI). Results: A total of 83 subjects (22.5%) met the study's criterion score for high internalized stigma. The independent predictors of high internalized stigma were; poor social support (Odds ratio, OR =