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The Effect Of Sodium Sulphate Contamination On Engineering Properties Of Lateritic Soil
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PROCEDURES
• Liquid limit: A sample weighing 200g from the material passing the 300um BS test sieve was taken.
• The sample was placed on flat glass plate and mix thoroughly with distilled water using the palette knife unit the mass becomes a thick homogonous paste.
• The paste was allowed to stand in air tight container for about 24hours to allow the water permeate throughout the soil mass.
• Curing was applied to where applicable and remix for about 10 minutes
• A portion of the remix soil sample was placed in the cup of the casangrade limit machine and leveled up to base.
• It was divided by draining the grooving tool along the diameter through the centre of the linge. The crank of the casangrade machine is been turned at the rate of two revolution per seconds unit there was closure.
• The moisture content was then determined.
• The sample was then remixed with additional water and the same procedure was repeated.
• The above two procedure were repeated unit two consecutive runs gives the same number of blows for closure.
• The result was plotted on a graph of percentage moisture content to 25 number of blows was taken as the liquid limit.
PLASTIC LIMIT
About 20g of dry soil all passing through 300um BS test sieve was mixed with sufficient water to form paste. The ball was rolled by hand on a glass plate with sufficient pressure to form a thread, when the diameter of the resulting thread became 3mm,it becomes to crumble and the moisture content was taken as the plastic limit.
PLASTIC INDEX
The plastic index is the subtraction of plastic limit from liquid limit l.e p.l = L.L – P.L.
3.3.3 COMPACTION TEST
The compaction test covers the determination of the mass of dry soil per cubic meter when the soil is compacted in a specific manner over a range of moisture content including the mass of dry soil per cubic meter. Standard proctor (ASTM D698/ASHTDT99) method was used.
APPARATUS
• A meter rammer having 100mm diameter circular face and weighing 2.5kg. the rammer falls from height of 300mm.
• A weighing balance
• 4.76mm BS test sieve
• A large metal tray
• Moisture cans
• Steel collar
• Extruder
• Graduated cylinder
• Hand trowel
• A cylinder metal mould
• Apparatus for moisture content determination
PROCEDURE
• A cylinder metal mould with a metal detachable base plate was weighted while empty.
• Water was added to the first specimen that pass 4.76mm BS test sieve and thoroughly mixed.
• The specimen was then compacted in the 3 layers blowing it with rammer at 27blows per layers.
• The moisture content of the specimen was determined
• The graph of dry density against moisture content was drawn to determine the maximum dry density and optimum moisture content.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT COMING SOON ... Continue reading---
APPENDIX A - [ Total Page(s): 3 ] ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONE1.0 INTRODUCTIONSoil is the cheapest and the most widely used material in civil engineering project as foundation material either in its natural or improved form. It is highly heterogeneous and an isotopic in nature and existing with different engineering properties which can be influenced to some extend by the presence of sodium salts under the influences of water (Olawale, 2013). ... Continue reading---
CHAPTER TWO - [ Total Page(s): 6 ]ReactionNacl(s) +H2SO4aq → NaHSO4aq + HCl1 Then, the sodium hydrogen tetraoxosulphate (vi) react with more sodium chloride to form the sodium tetraoxosulphate (vi)NaHSO4aq + NaClaq → Na2SO4aq + HClg (Michigan, 1990)2.4.2 CHEMICAL PROPERTIES OF SODIUM (II) TETRAOXOSULPHATE (VI) SALT Sodium sulphate (NaSO4) displays a moderate tendency to form double salts which is the only alum formed with common trivated metal which unstable above 39 (degree)C and NaCrSO4 (Soskatc ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 16 ]CHAPTER FOURRESULT ANALYSIS AND DISCUSSION4.1 PARTICLE SIZE DISTRIBUTIONThe result of the particle size distribution “sieve analysis†of the sample is analyzed and presented in the table and figure below. ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVE5.1 CONCLUSION From the investigations carried out on this work, the following conclusions are made: The laterite sample is classified as Sand Gravel soil according to AASHTO classification system and it is a good sub grade and sub-base material for Civil Engineering construction.The liquid test for unstabilized laterite is 60.31% and for the stabilized of 20% is 50.16,30 % is 46.9% and for 40% is 45.05 and plastic limits test for unstabilized laterite is 36.62% and ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESAbabio, O.Y. (1996), New School Chemistry for Senior Secondary School (2nd edition), Longman publisher, Erands, LondonAbraham, J. (1992), “Introduction to Soil Mechanics†(3rd edition), Macmillan INC, New York.Agbede, O. and osunmolale O. (1997), “All AboutSulphate Salt†Retrieved 2009-10-31â€. From www.ifgworld.org. Agbede, O. and Osunolale O. (2003), “Effect of Ph Contamination on Engineering Properties of Lateritic Soilâ€. Final Year Project i ... Continue reading---
