PARAMETERS CHANGES OF STABILIZED FIBROUS PEAT WITH EVIROMENTALLY FRIENDLY MATERIALS DUE TO WATER FILTRATION FROM THE SURROUNDINGS ON DIFFERENT AREA OF STABILIZATION

Abstract

Fibrous peat soil is very soft soil that a very low bearing capacity, with a large un-even settlement that occurs over a long period. Furthermore, several techniques were used to improve the physical and engineering characteristics of this soil, one of which is stabilizing it with a lime CaCO₃ and fly ash. The use of CaCO3 lime and fly ash as a stabilizing agent has often been used with good results. However, the research conducted has not yet model the real conditions in the field where the stabilized peat area is only in a certain area. This research is a laboratory model with real conditions in the field where the stabilization area is L and 2L wide. The percentage of a mixture of lime CaCO3 and fly ash used is 10%. The stabilized peat was placed among the initial peat, having water contents that were kept constant following the field’s actual conditions. Also, the physical and engineering properties of the stabilized soil were evaluated between 30 and 180 days. The test results showed that the physical and engineering properties improved in compare to the initial conditions, especially after the stabilization had lasted 90 days and above. Furthermore, changes in the stabilized soil's characteristics were influenced by the stabilization area's width where the peat with a 2L- width stabilization area gave better values than L-width area. Lastly, the water conditions in the peat pore significantly influenced the formation of CaCO3 gel which filled the pores and wrapped the peat fibers