Abstract
Great quantities of dredged marine soils (DMS) have been produced from the maintenance of channels, anchorages and for harbour development. DMS have the potential to pose ecological and human health risks and it is also considered as a geowaste. Malaysia is moving towards the sustainability approach and one of the key factors to achieve it is to reduce waste. Thus, this geowaste should be generated as a new resource to substitute soil for civil works such as for land reclamation and backfilling. This shows the improved settlement of consolidation in treated DMS. DMS is referred to as a cohesive soil which includes clayey silt, sandy clay, silty clay and organic clay. This type of soil has low strength and high compressibility. The objectives were achieved through literature review analysis and also laboratory test which was one dimensional oedometer test. On the other hand, treated DMS with more ground granulated blast furnace slag (GGBS) gives a lower settlement compared to specimen with higher percentage of cement in a treated soil. Thus this shows that cement content can be reduced in soil solidification when GGBS is added. The optimum binder ratio found was 3:7 where 3 is cement and 7 is GGBS.
Highlights
The soil samples were collected from Kuala Perlis, Perlis
According to Unified Soil Classification System (USCS), dredged marine soils (DMS) falls in High Plasticity clay (CH) category
The iron ore is reduced to iron and the remaining materials form a slag that floats on top of the iron. This slag is consistently tapped off as a molten liquid and if it is to be used for the manufacture of ground granulated blast furnace slag (GGBS) it has to be rapidly quenched in large volumes of water
Summary
The soil samples were collected from Kuala Perlis, Perlis. The soils were dredged from the sea by using clamshell dredger. The soils were dredged at 6 – 7 m depth from the sea level. The dredged soil was temporarily stored in a barge. The soils were scooped out from the barge and placed into the sampling buckets and transported from Kuala Perlis to laboratory. The soil samples were stored at UTHM laboratory. The soils were stored indoors to avoid sunlight and heat. High temperature of surrounding area can destroy the organic matter, causing loss of mass, contributes to water loss and result in the inaccuracy of moisture content measurement. The soils were transferred from sampling bucket to 5 covered storage containers
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