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Behaviour of Coconut Shell Aggregate (CSA) Concrete at Elevated Temperature

This paper attempts to study the mechanicalbehaviour of coconut shell aggregate (CSA) concretesubjected to elevated temperatures when coconut shell (CS)is used to replace coarse aggregate at 0, 10, 20 and 40% inconcrete. The coconut shell used was obtained by breakingthe shells into smaller sizes of less than 20mm after thefibres were removed. In order to produce control concretesamples with a minimum compressive strength of 15N/mm2at 28 days curing age, mix ratio of 1:2:4 and water-cementrat...

Mechanical Properties of Particleboard Made from Mahogany Leaves Using Gum Arabic as Binder

This paper presents the findings of an investigation into the use of mahogany leaves particles for the production of gumArabic bonded particleboards. Fresh mahogany leaves, air-dried to a target moisture content of 10% were crushed to anaverage particle size of 2mm. Mix ratios of 2:1, 2.5:1, 3:1, and 3.5:1 of gum Arabic to the crushed mahogany leaves byweight of the mahogany leaves were produced respectively. Twenty four (24) particleboards of sizes 200mm length,50mm width, and 6mm thick were...

Performance of Concrete Made with Coconut Shell Ash (CSA) as an Admixture in Acidic Environment

This paper presents the findings of an investigation on the use of coconut shell ash (CSA) as admixture in concrete and its effect on durability performance. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized by using X-ray Fluorescence (XRF) analytical method. The compressive and splitting tensile strengths of concrete were investigated at varying CSA additio...

Effect of Coconut Shell Ash (CSA) as an Amixture on the Properties of Cement Paste and Concrete

This paper presents the findings of an investigation on coconut shell ash (CSA) as admixture in cement paste and concrete. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of between 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized based on its oxides composition determined using X-ray Fluorescence (XRF) analytical method. The effects of CSA on cement paste were investigated with addition of 0, 2, 4, 6, 8 and...

Use of Correlation and Regression Analyses as Statistical Tools in Green Concrete Research

Correlation and regression in this paper were employed as analytical tools to study the degree of relationship as well asthe nature and strength of the relationship between green concrete properties and percentage replacement of cementwith civil engineering materials. Pearson product-moment method and Spearman’s correlation coefficient wereextensively used to show how correlation analysis can be practically applied in green concrete research. Least squareregression line method for both line...

Bill of Entry

A simple lead paper on hospital bills of entry and methods of approach to making up bills on different aspects of health practice and management.

Industrial revolution 4.0 implication to libraries and librarians

Introduction“The term Industry 4.0 stands for thefourth industrial revolution defi ned as anew level of organization and controlover the entire value chain of products.It is aimed at the increasinglyrequirements of individual customers.(Vaidya et al., 2018). The FourthIndustrial revolution is changing howwe live, work and communicate. Somebest examples are self-driving cars,online shopping, drone delivery servicesetc. Students today need to stay relevantfor future job markets, as artifici...

User perception on Electronic resources and services in National Defense University Library Islamabad, Pakistan.

Abstract:This paper is based on the perception of users about the Electronic resources and services offered  by  National  Defence  University  Islamabad.  For  conducting  this  survey,  a  structured questionnaire  was  designed  and  tested  through  library  experts,  after  few recommendations/corrections  being  made  by  the  experts,  this  questionnai...

Awareness of Web 2.0 Technology in the Academic libraries an islamabad perspective

Abstract Purpose The  main  purpose  of  this  study  is  to  determine  the  awareness  and  extent  use  of  Web  2.0 technology in the academic libraries of Islamabad, Pakistan. Design/methodology/approach The survey research methods was employed in this exploratory study through google forms on Awareness of Web 2.0 tools, the questionnaire were distributed among 100 library professionals of 43 Public and ...

An Assessment of Pollution and Effects on Human, Animals, Plants and The Environment in Nigeria (Lagos State)

ABSTRACTPollution is the introduction of waste into the atmosphere making it impossible to make life onearth possible to sustain. Pollution is the introduction of a contaminant into the environment. Alot of anthropocentric activities have contributed to the gradual degradation of the ecosystem.However, they  are measures   that  can bring   sanity   and  recovery the wounded ecosystem. Incourse   of   this   study,&nbs...