Determination of Swell Potential of Soils using Cole in Panyam, North – Central Nigeria

Swell potential of soils from parts of Panyam, North – Central Nigeria were investigated covering 72 square kilometres within latitudes N9021′ and N9026′ and longitudes 9011′E and 9015′30″E. With the increase of civil engineering constructions and the scramble for limited portions of competent soils for such constructions, there is an urgent need in a developing nation to study and characterize such soils based on its geotechnical properties. The geotechnical studies include twenty soil samples taken within the 1.5m depth with the aim of determining the swell potential in order to give appropriate guide to any civil engineering design and construction. The direct method of soil analysis which is the coefficient of linear extensibility (COLE), which ranges from 0.02–0.17 was used for the study. COLE Values greater than 0.06, were considered to be critical for most civil engineering design and constructions. Most of the samples studied were considered not safe for bungalows and some infrastructure without proper safety measures carried out to improve upon it.

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Microwave acid dissolution of soil samples for elemental analysis

Canadian Journal of Chemistry ◽

10.1139/v90-053 ◽

1990 ◽

Vol 68 (2) ◽

pp. 360-362 ◽

Cited By ~ 14

Author(s):

Byron Kratochvil ◽

Sipho Mamba

Keyword(s):

Atomic Absorption ◽

Absorption Spectroscopy ◽

Atomic Absorption Spectroscopy ◽

Soil Analysis ◽

Soil Samples ◽

Acid Dissolution ◽

Flame Atomic Absorption ◽

Trace Metal Determination ◽

Microwave Dissolution

Closed vessel microwave acid dissolution is compared with conventional open vessel methods for the determination of trace zinc and copper in a series of soil samples collected from sugarcane fields in Swaziland. Analytical measurements by flame atomic absorption spectroscopy show that alt the zinc and copper in the samples is released within 7 min in a commercial microwave oven at 400 W. Up to seven 500-mg portions can be handled at a time. Attention must be paid to the amount of organic matter present in a soil so that excess pressure build up does not occur during dissolution. Keywords: microwave dissolution, soil analysis, trace metal determination, atomic absorption spectroscopy.

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Forensic Engineering Analysis Of Total Reaction Time

Journal of the National Academy of Forensic Engineers ◽

10.51501/jotnafe.v20i1.606 ◽

2003 ◽

Vol 20 (1) ◽

Author(s):

James M. Green

Keyword(s):

Reaction Time ◽

Engineering Design ◽

Civil Engineering ◽

Accident Reconstruction ◽

Starting Point ◽

Perception Time ◽

Forensic Engineering ◽

Definition Of ◽

Actual Stimulus

This Paper Develops A Method For Determining A Meaningful Reaction Time In Accident Reconstruction And Civil Engineering Design. A Method For Total Perception Time (Tpt) Is Explained Using Literature From The Professions Of Psychology, Optometry And Engineering. A Determination Of Total Perception Time (Tpt), Or Total Perception Distance (Tpd), Is Given Where The Engineer Allows Enough Time For The Actual Stimulus To Be Identified Before Determining If Evasive Action Can Be Taken Or Collision Can Be Avoided. The Use Of Tpt Can Be Calculated In Accident Reconstruction And Engineering Design By Using The Actual Environmental Conditions That Were Present At The Site Under Investigation. The Purpose Of Presenting This Analysis Is To Establish A Starting Point For Discussion And Evaluation Of Total Perception Time (Tpt) Or Total Perception Distance (Tpd). The Reaction Time Sequence Affects Every Facet Of Forensic Engineering And Civil Engineering Design. It Is The Writers Intent That A Definition Of This Methodology Can Be Developed In Order That The Engineering Community Will Have A Tool That Is Accepted.

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