Utilization of fly ash for stabilization of marine dredged sediments

Silitonga, Ernesto Maringan; Levacher, Daniel; Mezazigh, Salim

doi:10.1080/19648189.2010.9693216

Cited by 34 publications

(12 citation statements)

References 7 publications

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“…Soil stabilization can be carried out by increasing the soil density, adding inactive materials to increase the cohesion or friction resistance, increasing materials for chemical and physical changes of the soil, reducing the groundwater surface, and replacing poor soil. In general, soil stabilization can be done in two ways, namely mechanical stabilization and chemical stabilization (Silitonga, Levacher and Mezazigh, 2010). Mechanical stabilization is a method to increase the bearing capacity of soil by improving the structure and repairing the physical properties of soil with various mechanical equipment, such as rollers, while chemical stabilization is a method to increase the strength and bearing capacity of soil by reducing or eliminating the unfavorable physical properties of soil and mixing soil with chemicals (Das, 2014).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay through Unconfined Compression Test

Hastuty

2019

Journal of the Civil Engineering Forum

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Soil stabilization is an effort to improve soil properties by adding additives in the soil to increase the soil strength and maintain the shear strength of the soil. There are many materials which can be used as stabilizers. The materials used in this study were cement, gypsum, and limestone, then the compressive strength values were compared by using the Unconfined Compression Test (UCT). The mixture combinations used in this study were 1% to 10% of cement, gypsum, and limestone on clay by curing for 14 days. The compressive strength value resulted from the unconfined compression test on the original soil sample was 1.4 kg/cm2. The original soil was classified as moderately sensitive soil because the sensitivity value of the original soil was 2. After being stabilized with various mixtures of cement, gypsum, and limestone, soil stabilization using cement obtained the maximum unconfined compressive strength value is 3.681 kg/cm2 in the mixture of 10%. Similarly, the soil stabilization using limestone and gypsum also obtained its maximum unconfined compressive strength value in the mixture of 10% is 3.307 kg/cm2 and 2.975 kg/cm2, respectively.

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Section: Introductionmentioning

confidence: 99%

Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay through Unconfined Compression Test

Hastuty

2019

Journal of the Civil Engineering Forum

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“…The Silica Fume addition enhances the compressive strength and reduces the overall permeability of hardened concrete due to its pozzolanic properties, which result in finer hydrated phases (C-S-H gel) and densified microstructure. Raiess-Ghasemi [8] stated in his study that, concretes made with Silica Fume have a finer pore structure, with a lower proportion of fairly coarse capillary pores. For the same composition, these concretes are, therefore, generally denser than pure Portland cement concretes.…”

Section: Introductionmentioning

confidence: 98%

Experimental Research of Stabilization of Polluted Marine Dredged Sediments By Using Silica Fume

Silitonga

2017

MATEC Web Conf.

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Abstract. In order to maintain the harbour activities, big amount of sediments are dredged every year. The traditional solution such as dumping the dredged sediments to the sea/river since its regulated in Europe, is not an option anymore. Therefore the beneficial reuse of polluted marine dredged sediments is urgently needed to realize. This study focused on reuse the dredged sediment in road construction. The main objective of this research is to enhance the physical, mechanical and chemical characteristics of the mix by incorporating binders sediments to fulfil the criteria in their use as material in road construction. The results show that the treatment by hydraulics binders and silica fume could satisfy the needed mechanical characteristics. The main reason of Silica Fume addition is its capability to trap the pollutants so that the pollutants could not escape from the matrix and pollute the environment. After the geotechnical study in laboratory results show as expected, then the study to identify the chemical characteristic realized. To evaluate the environmental impacts of the use material, leaching test are performed. The leaching test was performed to verify the predicted release of pollutants based on total dissolution. And for the final part, the test results show that the polluted marine dredged sediments could be safely used (in term of environmental impact) as a new material in road construction.

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“…Although the nature of the stabiliser and its activity in reaction with the soil is the most important parameter, the role of the energy, money and time required to gain/produce/tale these stabilisers is of great importance. Some of the commonly used supplementary cementing materials are fly ash, silica fume, ground granulated blast furnace slag and rice husk ash (RHA) (Silitonga, Levacher, & Mezazigh, 2010).…”

Section: Introductionmentioning

confidence: 99%

Strength Characteristics of Cement-Rice Husk Ash Stabilised Sand-Clay Mixture Reinforced with Polypropylene Fibers

Ghorbani

Salimzadehshooiili

Medzvieckas

et al. 2018

BJRBE

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In this paper, stress-strain behaviour of sand-clay mixture stabilised with different cement and rice husk ash percentages, and reinforced with different polypropylene fibre lengths are evaluated. Mixtures are widely used in road construction for soil stabilisation. It is observed that replacing half of the cement percentage (in high cement contents) with rice husk ash will result in a higher unconfined compressive strength. In addition, the presence of 6 mm polypropylene fibres will help to increase the unconfined compressive strength of stabilised samples, while larger fibres cause reverse behaviour. In addition, introducing a new index for assessing the effect of curing days. Curing Improvement Index it is obtained that larger fibres show higher Curing Improvement Index values. Results gained for the THE BALTIC JOURNAL OF ROAD AND BRIDGE ENGINEERING 2 0 1 8/ 1 3 (4) effects of curing days, and fibre lengths are further discussed and interpreted using Scanning Electron Microscopy photos. Based on the conducted Unconfined Compressive Strength, Indirect Tensile Strength, and Flexural Strength tests and using evolutionary polynomial regression modelling, some simple relations for prediction of unconfined compressive strength, indirect tensile strength, and flexural strength of cement-rice husk ash stabilised, and fibre reinforced samples are presented. High coefficients of determination of developed equations with experimental data show the accuracy of proposed relationships. Moreover, using a sensitivity analysis based on Cosine Amplitude Method, cement percentage and the length of polypropylene fibres used to reinforce the stabilised samples are respectively reported as the most and the least effective parameters on the unconfined compressive strength of specimens.

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Utilization of fly ash for stabilization of marine dredged sediments

Cited by 34 publications

References 7 publications

Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay through Unconfined Compression Test

Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay through Unconfined Compression Test

Experimental Research of Stabilization of Polluted Marine Dredged Sediments By Using Silica Fume

Strength Characteristics of Cement-Rice Husk Ash Stabilised Sand-Clay Mixture Reinforced with Polypropylene Fibers

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