Hydration of ternary blended cements with sewage sludge ash and limestone: Hydration mechanism and phase assemblage

Xia, Yan; Liu, Minghao; Zhao, Yading; Chi, Xiaofeng; Guo, Junzhen; Du, Donghang; Du, Jianxin

doi:10.1016/j.conbuildmat.2023.130868

Cited by 22 publications

(2 citation statements)

References 52 publications

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“…Further processing of the sludge to sludge ash and biochar add also new uses such as hydration of ternary blended cements (see [45] and [46] ) and water contaminants removal (see [47] and [48] ).…”

Section: Resultsmentioning

confidence: 99%

Physico-chemical characterization and possible uses of sludge processed from an urban sewage treatment plant

Sava,

Iluţiu-Varvara,

Mare

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Physico-chemical characterization and possible uses of sludge processed from an urban sewage treatment plant

Sava,

Iluţiu-Varvara,

Mare

et al. 2024

Heliyon

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“…In this regard, there are by-products produced from various industries that are used as a secondary binder for cement to enhance the microstructure and engineering properties. The several recylced waste materials such as fly ash (Liu et al, 2023), red mud (He et al, 2024), metakaolin (Luo and Wei, 2023), biochar (Wang and Wang, 2023), silica fume (Ma et al, 2022), sludge (Xia et al, 2023), calcined clay (Murali et al, 2023), and slag (Zhang et al, 2023) are used as a secondary binder to cement. Moreover, these materials are used in binary and ternary system of binder materials to improve the hydration characteristics to enhance the mechanical properties (Zhu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Interface of Cement-paste Composite by Dispersing Sustainable Nano-Carbon Pyrolytic Char with Silica fume: A Sustainable and Effective approach

2024

Global NEST Journal

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<p>Discrete studies are performed on the reuse of end-of-life tires in the construction industry as their accumulation is a global concern to the environment. In consequence, the desired focus of this work is to understand the interaction of powder derived from recycling process of tire waste which yet to be ascertained. The powder yielded through pyrolysis treatment of tire waste is carbon rich and nano in size. On the other hand, Silica Fume (SF) as a micro material is greatly utilized as cement replacement to reduce the environment impact. Therefore, the compressive strength and microstructure properties of cement paste is investigated by incorporating Nano-Carbon Pyrolytic char (NCP) (0.5% & 1%) and SF (0, 2.5, 5, 7.5, 10%) as an additive and filler, respectively, to the weight of cement. The compressive strength of cement paste is ascertained after 1, 3, 7, 14, & 28 days by employing 50mm3 cube specimen; and the durability properties such as sorptivity, rapid chloride permeability test, and acid test on the samples were examined. Further, Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD) analysis is performed to determine the microstructural properties. Finite element analysis used to model the cubes to validate the experimental findings with analytical results. From the results, the individual addition NCP char (0.5% & 1%) in cement paste reduced the compressive strength of the matrix. Further, the effectiveness of SF directly influences the strength property and separates the agglomerates of NCP char in cement paste. The cement paste incorporated with 1% of NCP char as Nano and 10% SF as micro blends improved the compressive strength by 18.56%. Furthermore, the Nano/micro blends in cement paste reacts with Ca(OH)2 to produce dense C-S-H formation due to their reinforcing capability resulting in better durability properties. Finite element analysis exhibit less than 10% of error compared to experimental values. Eventually, the influence of NCP char results in the development of new sustainable nano composites.</p>

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Studying the effectiveness of sewage sludge ash and its combination with natural pozzolans in controlling alkali–silica reaction

Amirjani,

Maleki,

Ramezanianpour

2024

Structural Concrete

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Sewage sludge ash (SSA), obtained by the incineration of sewage sludge, which is a byproduct of water treatment, could be used as a cement replacement material (CSR) to promote sustainability. SSA characteristics differ due to its different sources, compositions, and incineration methods. On the other hand, extensive investigations have highlighted the CSRs' ability to control alkali–silica reaction (ASR) as a destructive phenomenon, threatening durability. Hence, this study was conducted in order to study the ability of SSA with two finenesses, three replacement levels, and also its ternaries with trass or pumice, as natural pozzolans, to control ASR. The utilized SSA did not meet the requirements of a pozzolan at either finenesses. The results revealed that despite the fact that SSA generally reduced ASR expansion significantly, it only managed to control ASR at 50% replacement level. This was true for both finenesses. Furthermore, ternaries improved resistance against ASR expansion significantly, providing the ability to control ASR at lower replacement levels of SSA. The Si/Ca ratio was the key reason of SSA's ability to control ASR as it contained 1.5 and 2.5 times more SiO2 and Al2O3 than Portland cement respectively, and about one third of its CaO. Scanning electron microscopey (SEM), energy dispersive spectroscopy (EDS), and mapping confirmed that the relative amounts of Si, Al, and Ca in the SSA was crucial.

show abstract

Hydration of ternary blended cements with sewage sludge ash and limestone: Hydration mechanism and phase assemblage

Cited by 22 publications

References 52 publications

Physico-chemical characterization and possible uses of sludge processed from an urban sewage treatment plant

Physico-chemical characterization and possible uses of sludge processed from an urban sewage treatment plant

Enhancing the Interface of Cement-paste Composite by Dispersing Sustainable Nano-Carbon Pyrolytic Char with Silica fume: A Sustainable and Effective approach

Studying the effectiveness of sewage sludge ash and its combination with natural pozzolans in controlling alkali–silica reaction

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