Abstract
In this research the effect of adding the organic material was studied by
using (animal fertilizers) and the chemical material by using (compound of mixed
fertilizer) on the physical properties of the soil by studying ( Atterberk limits,
maximum dry unit weight) and mechanical properties ( unconfined compressive
strength, cohesion force, angle of internal friction and consolidation).
The study includes preparation of a number of disturbed samples, where the
soil was mixed with different percentages of organic and chemical materials
(0,2%,4%,6%) by water content equal to the optimum water content of the origin
soil used in order to study the effect of different percentages of adding materials
on the maximum unit weight . The study also includes the effect of time factor
where the tests are done in ages (0,1,7,30) days for organic and chemical soil samples prepared and covered in nylon pages perfectly closed until time of the
test referring above.
The results obtained from the tests refer to the large effect of organic and
chemical content on the engineering properties of the soil. It was noticed that for
different times of the test (0,1,7,30) days and for different percentage of organic
material (2-6%) increasing in the liquid limit, Plastic limit , angle of internal
friction and compression index(3-25%),(5-47%),(15-75%) ,(38-85%) respectively,
and percentage of increase range from (9-25%),(5-47%),(15-85%), (10-75%) by
adding percentage of chemical materials (2-6%) for testing time (1-30)days
respectively.
By noticing the testing time in ( 30 و 7و 1 ) days and by adding (2-6%) of
organic material were dropping by intense effect in specific gravity , bearing
capacity, cohesion and dry unit weight range from(3-33 ), (7-76%),(7- 0.5- )و(% 72
16%) respectively, while by adding (2-6%) of chemical materials, the dropping
was rang from (4-19% ),(21-61%),(21-62%)and ( 11-22%) for testing time
(1-30)days respectively.
Keywords
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