Experimental Study on Engineering Characteristics of Composite Geomaterial for Recycling Dredged Soil and Bottom Ash

Kim, Y. T.; Lee, Changho; Park, H. I.

doi:10.1080/1064119x.2010.514237

Cited by 27 publications

(4 citation statements)

References 25 publications

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“…It was also able to provide significant strength and stability to soil. As for WGM, 50-100 % of BA and POC resulted with higher strength gain and stiffness for a longer curing time [23], [28]. According to [29], the strength and stiffness of soil admixed with BA were influenced by the interparticle bonding at which the angularity structure of WGM had increased surface-to-surface contact and then further strengthen with cementation caused by pozzolan reaction.…”

Section: Sample Preparation and Test Methodsmentioning

confidence: 99%

SETTLEMENT REDUCTION OF DREDGED MARINE SOILS (DMS) ADMIXED WITH CEMENT & WASTE GRANULAR MATERIALS (WGM): 1-D COMPRESSIBILITY STUDY

Rosman¹

2017

GEOMATE

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Dredged marine soils (DMS) are considered as geo-waste and commonly disposed far into the sea. Environmental impacts raised from dredging such as turbidity and disturbance of marine ecosystem had increased the social demand to reuse DMS in engineering application. Typically, DMS have low shear strength and low bearing capacity. Hence, the DMS could be strengthened up by soil solidification. In present study, waste granular materials (WGM) such as coal bottom ash (BA) and palm oil clinker (POC) were utilized as additional binder to cement. The DMS were solidified with 3 series of admixtures; namely cement and/or WGM. The factor that influenced the compressibility of the soil sample such as percentages of admixtures were considered. Proportioned samples of 10, 15 and 20 % of cement, and/or 50 and 150 % of WGM of dry weight of DMS were subjected to one-dimensional oedometer test. The test samples were cured for 7 days in room temperature. Results show that cement-and WGM-admixed DMS have reduced the soil's compressibility considerably than the untreated sample. As expected, the cemented soil had significantly reduced the settlement better than WGM-admixed soil. Hence, homogeneous samples of 15C50BA and 10C100POC produced almost similar reduction of compressibility as sample 20C. Therefore, reusing WGM as partial replacement of cement in DMS could provide beneficial reuse of these materials.

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Section: Sample Preparation and Test Methodsmentioning

confidence: 99%

SETTLEMENT REDUCTION OF DREDGED MARINE SOILS (DMS) ADMIXED WITH CEMENT & WASTE GRANULAR MATERIALS (WGM): 1-D COMPRESSIBILITY STUDY

Rosman¹

2017

GEOMATE

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“…Many studies have proven that cement content at minimum of 10% had improved the engineering properties of DMS [20], [21]. Moreover, previous researchers have reported that 50-100% of BA and POC have resulted with significant gain of strength and stiffness which was influenced by the inter-particle bonding and pozzolanic reaction of these granular materials [19], [22], [23]. Hence, 50 and 150% of BA and POC by dry weight of soil were also used in this study.…”

Section: Summaries Of Physical and Chemicalmentioning

confidence: 99%

Compressibility and Permeability of Solidified Dredged Marine Soils (DMS) with the Addition of Cement and/or Waste Granular Materials (WGM)

Rosman

Chan

Anuar

2018

JST

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Dredged marine soils that obtained from dredging work were characterize as geo-waste, which is prone to be dumped rather than to be reused. This type of soil is high in compressibility and low in load bearing capacity. The engineering properties of this soft soil can be improve via soil solidification method. Cement is the common hydraulic binder used in soil solidification, were found to generate the emission of greenhouse gasses (GHG), particularly carbon dioxide (CO2) which also had affected the earth's atmosphere. Therefore, there has been an increasing interest in using alternate pozzolanic materials such as waste granular materials (WGM) to fully or partially substituted the use of cement in soil solidification. WGM such as coal bottom ash (BA) and palm oil clinker (POC) were opted due to its pozzolanic properties. Prior to the planning of reclamation work using DMS admixed with conventional and/or alternate pozzolanic materials, the consolidation characteristics of the admixed materials must be acknowledged. Hence, the present study will examine the amount of settlement and coefficient of permeability (k) of DMS treated with cement and/or WGM in laboratory-scale experiments. Samples were prepared in various proportion in order to examine the individual effect of the cement and/or alternate pozzolanic materials on compressibility and permeability. For cement-admixed DMS, sample with 20 % of cement have significantly reduced the settlement than untreated and 10 % cemented DMS. For WGM-admixed DMS, the initial void ratio is low as compared to the untreated DMS due to the rearrangement of soil particles, which is densely packed. For cement-WGM-admixed DMS, samples of 15C50BA and 15C50POC displayed significant settlement reduction than 10C100BA, 10C100POC and untreated samples.

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“…Because the strength of the cement-admixed clay does not linearly increase with the cement content [18], the utilization of BA in partially replacing cement or adding up could substantially reduce the use of cement, particularly when the high-strength cemented clay is required. A previous study [19] revealed two different mechanisms involving the strength increase of BA-added composite geomaterials: particle bonding and fabric change. The first one is attributed to the pozzolanic reaction, and the latter one deals with the packing effect.…”

Section: Introductionmentioning

confidence: 98%

Investigation of Strength and Microstructural Characteristics of Blended Cement-Admixed Clay with Bottom Ash

et al. 2023

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This research presents an experimental study of the strength and microstructural characteristics of cement-bottom ash-admixed Bangkok clay, paying special attention to the efficiency of adding up the bottom ash (BA) of different finesses as a cementitious material and the role played by BA in enhancing the strength of the mixture. The obtained results were discussed with cemented clay mixed with other industrial ashes (i.e., fly ash and risk husk ash). The pozzolanic reaction and packing effect of BA on strength development were also discussed with tests of mixtures with insoluble material. The experimental study was performed through unconfined compression (UC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) tests. The obtained results demonstrate that the BA could be advantageously supplemented as cementitious material into the cement-admixed clay mixture to improve the strength characteristic. The finer particle size of BA could be beneficial for achieving a high strength due to the pozzolanic reaction and packing effects. By adding up a BA content of larger than 15% when the base cement content is not less than 20%, the strength of the mixture increased efficiently with the increasing BA content. Compared with fly ash of a similar grain size, the higher efficiency of BA is obtained when a BA content of greater than 15% is considered. Finally, the microstructure and changes in elemental composition/distribution were analyzed by TGA and SEM tests to explain the mechanism to improve the strength of cement–BA-admixed clay.

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Experimental Study on Engineering Characteristics of Composite Geomaterial for Recycling Dredged Soil and Bottom Ash

Cited by 27 publications

References 25 publications

SETTLEMENT REDUCTION OF DREDGED MARINE SOILS (DMS) ADMIXED WITH CEMENT & WASTE GRANULAR MATERIALS (WGM): 1-D COMPRESSIBILITY STUDY

SETTLEMENT REDUCTION OF DREDGED MARINE SOILS (DMS) ADMIXED WITH CEMENT & WASTE GRANULAR MATERIALS (WGM): 1-D COMPRESSIBILITY STUDY

Compressibility and Permeability of Solidified Dredged Marine Soils (DMS) with the Addition of Cement and/or Waste Granular Materials (WGM)

Investigation of Strength and Microstructural Characteristics of Blended Cement-Admixed Clay with Bottom Ash

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