Unit weight, strength and microstructure of a water treatment sludge–fly ash lightweight cellular geopolymer

Suksiripattanapong, Cherdsak; Horpibulsuk, Suksun; Boongrasan, Surachet; Udomchai, Artit; Chinkulkijniwat, Avirut; Arulrajah, Arul

doi:10.1016/j.conbuildmat.2015.07.091

Cited by 78 publications

(35 citation statements)

References 41 publications

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“…Soil stabilizers are generally categorized as "traditional" or "non-traditional" . Traditional chemical stabilizers include cement, lime, fly ash and bituminous materials while non-traditional additives include enzymes, liquid polymers, resins, acids, silicates, ions and lignin derivatives, which are sometimes used in combination Sukmak et al, 2013Sukmak et al, , 2015Suksiripattanapong et al, 2015aSuksiripattanapong et al, , 2015bTingle et al, 2007). Non-traditional additives can be produced using different kinds of chemical agents that induce different chemical reactions when mixed with soil.…”

Section: Introductionmentioning

confidence: 99%

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Latifi

Meehan

Majid

et al. 2016

Applied Clay Science

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103

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Section: Introductionmentioning

confidence: 99%

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Latifi

Meehan

Majid

et al. 2016

Applied Clay Science

Self Cite

103

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“…Aluminosilicate gels form geopolymers and nanocrystalline zeolites which have comparable strength properties, making them a potential replacement for ordinary Portland cement [7]. They have been synthesized using aluminosilicates and an alkali activator solution such as Na 2 SiO 3 , NaOH, and environmental engineering, such as in cement [11,12], foamed panels [13], heavy metal immobilization [14], masonry units [15,16], paving blocks [17], and soil stabilization [18]. Several studies have been conducted by synthesizing these, using different precursors such as metakaolin [11,12,[19][20][21] and industrial byproducts such as coal fly ash [22][23][24], coal gangue [25,26], slags [22], municipal solid waste incinerator fly ash [27], recycled asphalt pavement [28], red mud [21,24,29], rice husk ash [6,11], waste glass [16], and water treatment sludge [15].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Geopolymers Synthesized from Fly Ash and Red Mud under Ambient Conditions

Koshy

Dondrob

et al. 2019

Crystals

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Aluminosilicate gels form geopolymers and nanocrystalline zeolites which have comparable strength properties, making them a potential replacement for ordinary Portland cement. The study explores the use of two untreated industrial wastes, Class-F fly ash and red mud, for synthesizing geopolymeric material at ambient synthesis conditions. The high alkalinity present in the red mud was exploited for the dissolution of silica in the fly ash and red mud. The mechanical, mineralogical, microstructural, and pore characteristics were analyzed and the contributions of curing period, Si/Al, Na/Al, and liquid-to-solid (L/S) ratios on the compressive strength of the end products were also investigated. The alkalinity of the system due to the red mud was adequate for the dissolution of raw fly ash and the subsequent formation of aluminosilicate gels. The strength of the end product was directly proportional to the initial Si/Al ratio and the specimens with highest fly ash content exhibited highest compressive strength values after 28 days of curing. Furthermore, fly ash contributed to the formation and distribution of interstitial and capillary pores in the aluminosilicate matrix. The lowest L/S ratio of the initial mix resulted in the end product with the highest unconfined compressive strength.

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“…In Brazil, this subject requires further discussion and research [1]. Identifying new treatment methods and handling processes, as well as appropriate final destinations for this waste, is a challenge for engineers and researchers all over the world [2,3]. It is necessary to find alternative uses for the waste generated by the production processes, which are technical and economically feasible, and minimize the environmental impact [4].…”

Section: Introductionmentioning

confidence: 99%

Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR)

Ramirez¹,

Possan

Bittencourt

et al. 2018

Matéria (Rio J.)

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The water treatment process generates a residue called water treatment plant (WTP) sludge, which needs to be correctly characterized to ensure appropriate disposal or reuse. This study aimed to characterize the centrifuged sludge produced at the Tamanduá WTP, Iguaçu Falls City, Brazil, and considered opportunities for its reuse in the production of concrete for the civil construction industry. Wet sludge (sludge in its natural form) analysis included the determination of total solids, moisture content, density, pH, and inorganic parameters (As, Al, Ba, Cd, Pb, Cr, F, Hg, Ag, and Se) through thermogravimetric analysis, X-ray diffraction, and chemical analysis by X-ray fluorescence and loss ignition. For calcined WTP sludge, chemical and mineralogical composition and laser granulometry were evaluated. The results indicated that calcined sludge had the potential to be used in the production of cement materials; conversely wet sludge did not reach the appropriate safety standards due to the high quantity of organic matter.

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Unit weight, strength and microstructure of a water treatment sludge–fly ash lightweight cellular geopolymer

Cited by 78 publications

References 41 publications

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Strengthening montmorillonitic and kaolinitic clays using a calcium-based non-traditional additive: A micro-level study

Mechanical Properties of Geopolymers Synthesized from Fly Ash and Red Mud under Ambient Conditions

Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR)

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