Effects of GGBS and Fly Ash in Binders on Soil Stabilization for Road Construction

Abstract

In this paper we propose a new technique of soil stabilization for road construction based on using new alternative binders. The project aims to evaluate the effects of alternative additive materials in soil stabilization contexts for road construction. The alternative binders (slag, energy ash and bio ash as new alternative road construction material) have been used to complement the traditional binders (cement and lime). The project used five binders and evaluated their effects on soil strength. The proposed method comprises advantages of using the alternative binders which are the residual products contributing to a lower environmental impact. The results have shown that only slag has significant effects on the strength of the stabilized soil, while bio ash and energy ash make a marginal contribution to the increase of strength. This is caused by the twofold reasons. First, the effects of the amount of ashes that should reach a certain threshold with respect to the total amount of binder that must be exceeded to have the effect of the soil mixture. Second, the bio fly ash was stored and it was not completely fresh which may have contributed to the carbonation during the storage period and results in a lower hardening ability. Based on the results of the study we recommend the use of bio fly ash as a supply material andfor its amount to be adjusted so the storage period is not too long. This study verified the effects of slag, cement and lime on stabilization of soil for road construction.

Acoustics of Compressed Earth Blocks Bound Using Sugarcane Bagasse Ash and Water Hyacinth Ash

“…Figure 1 shows some of the modern earth blocks wit aesthetic value, as well as be er mechanical properties that are currently being used in th construction of walls of houses. In the search for alternative binders to cement, many materials have been invest gated, including fly ash, rice husk, silica fume, eggshell, groundnut shell, sugarcane ba gasse ash, cassava powder, waste glass, coal bo om ash, waste marble powder, and waste derived ceramic concrete [13][14][15][16][17][18][19][20][21][22][23]. However, large quantities of these materials that can b used in building reasonable-sized houses may not be easy to find.…”