Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement

Tang, Qiang; Liu, Yang; Gu, Fan; Zhou, Ting

doi:10.1155/2016/7101243

Cited by 58 publications

(41 citation statements)

References 38 publications

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“…Table 3. ere is a certain interfacial cohesion at the interface of rice straw rope and dredger fill silt [36][37][38][39][40]. With the increase of immersion time, the interfacial cohesion decreases after 20 days' immersion and then increases, while the interfacial friction angle increases first and then decreases.…”

Section: Pull-out Test Resultsmentioning

confidence: 99%

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Chen

Shi

et al. 2020

Advances in Civil Engineering

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The further development of land reclamation, port waterway, and wharf construction brings about proper treatments of dredger fill silt, while huge amounts of rice straw set aside in China argument rational disposal every year. Therefore, rice straw is bundled up as ropes, which represent as drainage body and reinforcement, to make eco-friendly treatment for dredger fill silt. This paper investigates the mechanical properties and validity of rice straw rope as certain treating material of dredger fill silt through a series of pull-out test, mass loss test, and tension test on specimens with different water contents and dry densities. The results reveal that peak value of interfacial shear strength rises with the increase of normal stress at the same immersion time, and in particular, it rises by up to 250.0% when the normal stress is 40 kPa. The tensile force of rice straw rope increases slowly with the rise of tensile displacement, and the failure mode changes from brittle to ductile with the rise of immersion time, which witnesses first rapid back slow degradation trend. The proper interfacial shear strength, tensile force, and reasonable degradation rate of rice straw rope make it ideal in drainage and consolidation of dredger fill silt.

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Section: Pull-out Test Resultsmentioning

confidence: 99%

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Chen

Shi

et al. 2020

Advances in Civil Engineering

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“…There is the possibility to obtain granules from fly ash and phosphogypsum with adequate strength for dustfree transportation, storage and dosage (Borowski and Hycnar, 2016). The compressive strength test results, the compressive strength of the mixtures increased along with the cement/fly ash ratio and curing time (Tang et al, 2016).…”

Section: Characteristics Of Soil Samplesmentioning

confidence: 95%

Stabilization/Solidification of Tailing on Traditional Gold Mining in Kulon Progo Using Fly Ash

Rachman¹,

Bahri²,

Trihadiningrum³

2018

J. Ecol. Eng.

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Traditional gold mining activity is one of the sources of mercury contamination. Total mercury concentration in tailing ponds in Kulon Progo ranged from 164.49 mg/kg to 383.21 mg/kg, which exceeded the quality standard values set by the government of Indonesia No. 101 of 2014, which is 75 mg/kg. One method that can be applied is stabilization/solidification (S/S). This study aims to determine the optimum composition of the tailing mixture with fly ash in S/S process. The variations of fly ash composition with tailing are 100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, 30:70, 20:80 and 10:90. The results of the study found that the optimum composition of fly ash: tailings was 10:90, with compression test of 74 ton/m 2 and TCLP test was 0.0069 mg/L. The obtained compression test results were in accordance with US EPA Standard quality of 35 ton/m 2 . TCLP test results meet the standard of Indonesian Government Regulation no. 101 of 2014, amounting to 0.05 mg/L.

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“…Fly ash, one of the major wastes generated from MSWI, is acknowledged to be a hazardous waste, due to the fact that it contains a large quantity of heavy metals and dioxin [2][3][4]. To reduce the damage of MSWI fly ash to environment, various methods were previously proposed, for instance, cement solidification [5,6] and chemical stabilization [7,8]. However, cement solidification brought the problem of volume enlargement, and chemical stabilization could not solidify several heavy metals at the same time.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of heavy metals in municipal solid waste circulating fluidized bed incineration fly ash by fusion–hydrothermal method

Chen

Jiang

Zhao

et al. 2019

Waste Dispos. Sustain. Energy

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Municipal solid waste circulating fluidized bed incineration (MSWCFBI) fly ash was a hazardous waste, maintaining challenges for disposal. One effective approach was stabilizing the toxic heavy metal ions in the fly ash structures in situ. This work proposed a fusion-hydrothermal method, including fusion pretreatment in nitrogen atmosphere and microwave-assisted hydrothermal process, to treat three MSWCFBI fly ash samples. Specifically, leaching tests were performed to demonstrate the heavy metal stabilization. Through the treatment of the fusion-hydrothermal process, the concentrations of Cd, Cu, Zn, Pb, Ni, and Cr ions leaching from the fly ashes were obviously less than those of the raw fly ash and the sample only treated by hydrothermal process. Meanwhile, the heavy metal ions migrating from the fly ash to the hydrothermal residual liquid were reduced. Importantly, lots of zeolites formed during the fusion-hydrothermal process, such as to bermorite and sodalite. The fusion pretreatment significantly facilitated the conversion of quartz into amorphous silicon and silicate salts. Then, the silicon dissolution was accelerated and zeolite formation was promoted. Eventually, the heavy metal ions could be trapped in zeolite frameworks, enhancing the stabilization of heavy metal. Moreover, the cation-exchange capability values of the three treated fly ash were 1.099, 1.168, and 1.188 meq g −1 , two-folder larger than those of the samples only treated by hydrothermal process. In summary, the fusion-hydrothermal method could facilitate the stabilization of heavy metal ions in the fly ash and the as-obtained solid product with high content of zeolite was promising for future applications.

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Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement

Cited by 58 publications

References 38 publications

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Stabilization/Solidification of Tailing on Traditional Gold Mining in Kulon Progo Using Fly Ash

Stabilization of heavy metals in municipal solid waste circulating fluidized bed incineration fly ash by fusion–hydrothermal method

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