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The Effect Of Partial Replacement Of Conventional Fine Aggregate (sand) With Lateritic Soil In The Production Of Sandcrete Bricks
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Apparatus: Compaction mould and collar, base plate, weighing balance, sample cans, drying oven, rammer (4.5Kg), large mixing pan, mechanical mixer and graduated cylinder (for water), straight edge steel or knife (for smoothening ends of compacted soil sample).
Procedure
300g of air dried soil sample was pulverized and run through the 4.00mm sieve and it was mixed thoroughly with initial percentage of water based on estimated dry weight and compacted into a 988*1 mould in 3 layers, with 25 blows using 2.50kg hammer of height 0.3 im. An even distribution of blow was ensured. The collar was meticulously removed and the mould was trimmed with the straight edge steel in order to level the mould containing samples. The mould with the soil was weighed, a representative sample was obtained from water content determination both at the top and the bottom. The soil was removed from the mould and it was remixed and the process of compaction was repeated. This procedure was repeated five times and a curve of dry density against water content and the maximum dry density was determined and recorded.
3.6.2 Modified Proctor Compaction
Aim: To determine the modified Proctor compaction of the soil sample.
Apparatus: The apparatus used in the modified Proctor test is the same as those used in the standard Proctor test.
Procedure
The procedures are the same as that of standard Proctor except that the compaction was done on 5 layers at 55 blows per layer with the same mould and the use of big rammer.
Compressive Strength Test
Aim: To determine the compressive strength of the sandcrete bricks.
Apparatus: Compression machine, two steel plates, weighing balance and the brick samples.
Procedure: The compression machine is connected to the main and the pointer on the reading calibration scale is adjusted to the zero mark. The metal sheet placed on top of the brick (to spread the load) is weighed so as to add it to the compressive strength value read from the machine and this sum is taken as the compressive strength value of the brick sample.
The sandcrete bricks is weighed and recorded and then placed between the metal plates that completely cover the area of the brick and fed into the compression zone and locked with the brick centralized within the compression zone. The start button is depressed to initiate the electronic compression and as the compressive force is applied to the brick, the pointer reading the compressive strength value in kilo-Newton (KN) gradually rises till it reached its peak and then begins to drop back. The maximum value just before the pointer begins to drop or the pointer reading when visible cracks is evident on the brick is taken as the compressive strength of the brick which is indicated by another pointer in the former case. The compression is then powered off by depressing the red button and the brick released and the crushed bricks poured out for disposal.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT WILL BE HERE SOON ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONE1.0 Introduction Lateritic soils are formed in hot, wet tropical regions with an annual rainfall between 750 to 300mm, (usually in areas with a significant dry season) on a variety of different types of rock with high iron content. The location on the earth, that characterize these conditions fall between latitude 35oS and 35oN (Person, 1970).Laterisation is the removal of silicon through hydrolysis and oxidation that result in the formation of laterite and lateritic soil ... Continue reading---
CHAPTER TWO - [ Total Page(s): 9 ]CHAPTER TWO2.0 Literature ReviewLaterite is often used to describe the clinkered siliconized clay material. According to Amu et.al. (2011), it could be described as materials with no reasonable constants properties while Villain Cocinaet et.al. (2003), described it as a red friable clay surface, a very hard homogenous vesicular massive clinker-like material with a framework of red hydrated ferric oxides of vesicular infill of soft aluminum oxides of yellowish color. Villain Cocinaet et.al ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 15 ]PERCENTAGE OF STABILIZER ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVE5.0 CONCLUSIONS, REFERENCE AND RECOMMENDATION. 5.1 Conclusion. Tests
have been conducted to evaluate the suitability of lateritic soils
along Asa dam area Ilorin kwara state and its effect on the strength of
sandcrete bricks when used to replace the conventional fine aggregate,
the following conclusions can be drawn from the analysis of the results:
I. The use of lateritic fine as a partial replacement has a significant influence on the engineering pro ... Continue reading---
REFRENCES - [ Total Page(s): 3 ]REFERENCESAdam, E. A. (2001): Compressed Stabilised earth block manufactured in sudan, A. Publication for UNESCO (online) Available from http://unesdoc.unesco.org.Adepegba, D.A. (1975). “Comparative Study of Normal Concrete which contains Laterite Fines instead of Sand†Building Science; 10:135-41.Agbede, I.O. and Manasseh, V. (2008): use of cement sand admixture in lateritic brick production for low cost housing Leonardo electric Journal of practices and technology, 12, pp163-174.Ak ... Continue reading---
