TESTS TO EXAMINE THE EFFECT OF DIFFERENT COMPACTIVE EFFORT ON THE DEGREE OF COMPACTION.
REPORT FROM LABORATORY EXPERIMENT ON 7 AUGUST 2013
AS PART OF THE UNIT OF STUDY CIVL2410 SOIL MECHANICS
WISMOYO EFENDY 311288669
10 AUGUST 2013
Abstract
This report describes two Proctor tests, the Standard and Modified Proctor test. The main aim of this experiment is to examine the effect of different compactive effort provided by the different tests on the degree of compaction. The dry densities of the two tests were calculated and plotted against the moisture content to obtain maximum dry density and the optimum moisture content. These values were then compared. The maximum dry density for SPT was calculated to be 1.760 t/m3 and the MPT was 1.846 t/m3. Calculation errors might be present but does not cause discrepancy in the overall result. These results prove that with higher compactive effort, the dry density increases. This result correlates with theory
Introduction
Compaction of a soil means to reduce the air voids in the soil. Air voids in the soil decreases the shear strength of the soil, increases the permeability and decreases the stiffness that leads to the settlement under loading (Dr. Leslie Davison 2000). Therefore, it is important that engineers compact a soil and be able to determine the best compactive effort and right moisture content for the soil. Compaction is efficient up to the optimum moisture content, after that, the soil turns to be less dense and efficiency decreases (Texas A&M University).
The aim of this experiment is to determine the moisture content and dry density of two different proctor tests, with different compactive effort, and how the dry density is related to the compactive effort. The graph of moisture content on dry density is aimed to compare the optimum moisture content and maximum dry density of the soil of the two different compactive efforts.
Methods
The soil provided will go through a sieve...