Walkway Subgrade Stabilization Using Fly Ash

The effectiveness of fly ash use in the stabilization of soil and the method that is used to test the strength of the subgrade soil with different amount of fly ash in order to stabilize the soil were studied. In this research project, the by-product of coal which is the fly ash was used as the subgrade stabilization material for walkway. The primary reason fly ash is used in soil stabilization applications is to improve the compressive and shearing strength of soils. The soil effectiveness was tested by using different percentages of fly ash which is 5%, 10% and 15%.Laboratory tests such as the moisture content, particle size analysis, liquid limit, plastic limit,standard proctor and California Bearing Ratio (CBR) were carried out for the soil sample in order to study the engineering properties of the soil and to determine the optimum moisture content of fly ash that give maximum CBR value for 5%, 10% and 15% soil-fly ash mixture. If the CBR value is increasing by adding the fly ash to the soil there is effectiveness in increasing the soil strength and vice versa

Walkway subgrade stabilization using fly ash

This thesis is about the walkway subgrade stabilization using fly ash. Fly ash has, been used as an additive which can improve the stabilization of subgrade. The objective of this thesis is to conduct testing in order to ascertain the engineering properties of soil and to determine the optimum moisture content of fly ash that give maximum CBR value for 5%, 10% and 15% soil-fly ash mixture. The effectiveness towards the soil by using different percentages of fly ash which is 5%, 10% and 15% was tested. For this research, a few laboratory tests were carried out to determine the improvement in the soil stabilization by using fly ash. From the result of the experiment, it can be concluded that the CBR value increases when the percentage of fly ash used in the soil mixture increases. This shows that the increases in amount of fly ash increases the compression and shearing strength of the soil and hence makes the subgrade to be more stabilized