Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture

Montalvan, Edy Lenin Tejeda; Boscov, Maria Eugênia Gimenez

doi:10.1061/9780784480144.041

Cited by 6 publications

(14 citation statements)

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“…Cubatao WTS was collected after dewatering, directly from the centrifuges, and a representative sample (RS-06) were prepared according to (TSUGAWA et al, 2019). Cubatao WTS has been investigated in terms of chemical, physical, mineralogical, geotechnical and rheological parameters (FERREIRA et al, 2019;MONTALVAN;BOSCOV, 2016 1.…”

Section: Methodsmentioning

confidence: 99%

“…However, even after dewatering processes, the water content of WTS is higher than its liquid limit, impeding the direct application of WTS in the field. Investigations on the geotechnical behavior of WTS have been carried out aiming at its reuse (FERREIRA et al, 2019;MONTALVAN;BOSCOV, 2016;O'KELLY, 2008O'KELLY, , 2016QUILLE, 2009QUILLE, , 2010TSUGAWA;BOSCOV, 2018;ROQUE;CARVALHO, 2006;SILVA, 2017a; TSUGAWA, J.K.T; ROMANO, R.C. DE O.; PILEGGI, R.G; BOSCOV, 2019;TSUGAWA et al, 2019;TSUGAWA;BOSCOV, 2017;WANG et al, 1992;WANG;HULL;JAO, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Influence of Lime on the Undrained Shear Strength of Water Treatment Sludge from Cubatao: Miniature Vane and Fall-Cone Tests

Tsugawa¹,

Pereira²,

Boscov³

2020

Congresso Brasileiro De Mecânica Dos Solos E Engenharia Geotécnica

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Even after dewatering, WTS water content (w) is very high and undrained shear strength (Su) is very low. Lime is used to decrease plasticity and enhance workability and shear strength of soft soils. WTS stabilized with lime may be a suitable material as covers of sanitary landfills, filling of trenches, pavement subbases and other geotechnical applications. This paper presents the influence of lime on Su of WTS-lime mixtures at lime contents of 5, 10, 25, 50, 75, 100 and 150% (dry weight basis). Also, determination of Hansbo's cone factor (K) for WTS-lime mixtures by calibration with miniature vane data was performed, obtaining K of 1.27. Miniature vane and fall-cone tests indicated that Su smoothly increases with lime content from 1.0 to 2.3 kPa and from 0.9 to 3.0 kPa, respectively, which were lower than expected. Su presented high dispersion for both vane and cone tests, and only a subtle increase of Su was observed for the increase of consistency index from -1.50 to 0.07. In conclusion, vane and cone tests are not adequate to measure Su of WTS-lime mixtures with precision, and a proportion of WTS:lime higher than 2:1 (150%) is necessary to transform WTS in a geo-material.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Lime on the Undrained Shear Strength of Water Treatment Sludge from Cubatao: Miniature Vane and Fall-Cone Tests

Tsugawa¹,

Pereira²,

Boscov³

2020

Congresso Brasileiro De Mecânica Dos Solos E Engenharia Geotécnica

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“…In the 70s, investigations about WTS remained in terms of reviews of disposal technology and regulatory requirements, presenting only physical-chemical characteristics of WTS (ALBRECHT, 1972;AWWA, 1978). Researches on the reuse of WTS as geotechnical material started in the 80s (BABATUNDE; ZHAO, 2007) but did not develop significantly for the next decades, remaining basically restricted to geotechnical and geo-environmental characterization of WTS (AYDILEK;EDIL;FOX, 1999;BASIM, 1999;RAGHU, 1997;O'KELLY, 2008;O'KELLY;QUILLE, 2009QUILLE, , 2010CORNWELL, 1998;XIA, 1994;CASTILHOS JUNIOR;PRIM;PIMENTEL, 2012;BOSCOV, 2016;RAGHU et al, 1987;RODRIGUEZ et al, 2011;ROQUE;CARVALHO, 2006;WANG;JAO, 1991).…”

Section: Geotechnical Characterizationmentioning

confidence: 99%

“…Cubatão WTS is here named "as-collected" to describe samples collected at the WTP directly after dewatering by centrifugation. Montalvan and Boscov (2016)…”

Section: Cubatão Wtsmentioning

confidence: 99%

“…Geotechnical and geoenvironmental characteristics of WTS have been investigated (AYDILEK;EDIL;FOX, 1999;BASIM, 1999;FERREIRA et al, 2019;RAGHU, 1997;O'KELLY, 2008O'KELLY, , 2016O'KELLY;QUILLE, 2009QUILLE, , 2010TSUGAWA;BOSCOV, 2018;HEMSI, 2018;TSUGAWA et al, 2019b;CORNWELL, 1998;XIA, 1994) and analyzed for potential application as geotechnical material (CASTILHOS JUNIOR;PRIM;PIMENTEL, 2012;MARCHIORI et al, 2021;BOSCOV, 2016;RAGHU et al, 1987;RODRIGUEZ et al, 2011;ROQUE;CARVALHO, 2006;SILVA, 2017;WANG et al, 1992). Results from these researches suggest that WTS has potential as geomaterial, insofar as treated to abate its fluid-like behavior.…”

Section: Introductionmentioning

confidence: 99%

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Methodology to evaluate the behavior of water treatment sludge and other pasty waste as sustainable geomaterial: rheological and geotechnical approaches.

Tsugawa¹

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A special thank you to my husband, Fernando Fonterrada, for his love and constant support during our entire life. Without him, anything would be a waste of time. To my kids, Yasmim and Kaike, I say: I love you! Thank you for all happiness you have given me.A great honor to be the daughter of my parents, Elza and Julio Tsugawa. Thank you for your strength and resilience.Many thanks to Professor Dr. Rafael Giuliano Pileggi for opening his laboratory to me. The experiments were an essential and innovative part of the research. Thank you for the classes and discussions; they were helpful and clarifying. Also, I recognize Dr. Roberto Cesar de Oliveira Romano for his countless availability throughout all investigations. I am grateful for the sincerity and friendship of Professor Dr. Krishna Reddy from the University of Illinois at Chicago (UIC). Thank you for welcoming me to your laboratory. The time in Chicago was unforgettable and fundamental for my research. Thanks to Prof. Paulo Scarano Hemsi from the Aeronautics Institute of Technology (ITA), who has collaborated with the research group since my master's dissertation. To the technicians, Mr. Antonio Heitzman and Mrs. Valdineia dos Santos Silva, my admiration and respect. Thank you for the moments at the Laboratory of Soil Mechanics Milton Vargas (LMS). All of them I will bring with me forever. Prof. Sérgio Cirelli Ângulo, thank you for your didactic, knowledge, and availability for the conversations about sampling. The organizing method you have taught in the innovation classes was crucial for my thesis structuring. Wandrea Dantas, I am grateful for your tireless dedication to the graduate students. Without your work, nothing could be done, and fewer students would reach their dreams. Renata Monte, thank you for the opportunity to work together. I hope for another chance in the future. Rosangela Alves, many thanks for your support. Without you, my internship at the UIC could not have been done. Thanks for all undergraduate and graduate students who helped me to perform the experimental program during the research:

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Geotechnical Parameters of Mixtures of a Tropical Soil with Water Treatment Sludge

Montalvan

Boscov

2018

Environmental Science and Engineering

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Geotechnical Characterization of a Soil-Water Treatment Sludge Mixture

Cited by 6 publications

References 6 publications

Influence of Lime on the Undrained Shear Strength of Water Treatment Sludge from Cubatao: Miniature Vane and Fall-Cone Tests

Influence of Lime on the Undrained Shear Strength of Water Treatment Sludge from Cubatao: Miniature Vane and Fall-Cone Tests

Methodology to evaluate the behavior of water treatment sludge and other pasty waste as sustainable geomaterial: rheological and geotechnical approaches.

Geotechnical Parameters of Mixtures of a Tropical Soil with Water Treatment Sludge

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