Abstract
The main focus of this study was to investigate the effect of fly ash content on the engineering properties of stabilized soils. To these attempts, two different types of fly ash, inorganic silt and Portland cement were collected. In the laboratory, the fly ash content of 10. 20 and 30%; inorganic silt of 10, 20 and 30% as well as cement content of 10 was used to stabilize soils. Result reveals that Atterberg limit decreases in relation to the increasing of fly ash content in stabilized soil at varying mixing proportions of fly ash content in soil. The different values of compressive strength of stabilized soils obtained from fly ash of different brand cement. In addition, the stabilized soil with cement content showed the highest value of compressive strength, whereas, stabilized soil with inorganic silt provides lowest value. The result reveals that the optimum content of fly ash was 20 and 30% for elephant and seven rings cement, respectively. The soil with organic content of 16% showed highest value of compressive strength, while, soil with organic content of 12.5% showed lowest value. Furthermore, the stabilized soils with fly ash showed comparatively the higher values of compressive strength than that of stabilized soils with inorganic silt content.
Highlights
The problems of soft soil in most of the parts of South-east Asian countries have been one of the major challenges for infrastructure planning and implementation [1]
Soils having lower specific gravity coupled with higher compressibility and significant secondary compression, associated with absurd strength properties with significant organic matter are comprehended as problem soils by civil engineers [2,3,4]
The Atterberg limits vary with the amount of clay present in a soil, organic content on the type of clay mineral and on the nature of the ions absorbed on the clay surface
Summary
The problems of soft soil in most of the parts of South-east Asian countries have been one of the major challenges for infrastructure planning and implementation [1]. Khulna is the third largest and south-western divisional metropolitan city in Bangladesh, near the world heritage site, Sundarbans, circumscribed by Bay of Bengal on the south, Jessore and Narail district on the north and Bagerhat and Satkhira district on the east and west, respectively It is situated at latitude of 22°48'35.24" north and longitude of 89°33'51.8" east about 48km away from second largest port of Bangladesh.The ground of this region consists of coarse to very fine sand, silty clay, clay and very soft silt, which can be defined as ‘compressible and collapsible sediments’ having the thickness of top soil is about 6 to 20 m or more [13, 14]. The outcome of this study will help the other researchers in this line
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