Utilization of sewage sludge ash in ultra-high performance concrete (UHPC): Microstructure and life-cycle assessment

Xia, Yan; Liu, Minghao; Zhao, Yading; Chi, Xiaofeng; Lu, Zhenyu; Tang, Kan; Guo, Junzhen

doi:10.1016/j.jenvman.2022.116690

Cited by 45 publications

(2 citation statements)

References 55 publications

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“…Another method of management could be the use of ash as a phosphate fertilizer or for the recovery of phosphorus compounds from them, from which it is possible to produce synthetic phosphate fertilizers [4,6,14,15]. In the literature, one can also find the idea of creating concretes and cements with good mechanical properties, containing SSA [16][17][18][19] and lightweight aggregates [20][21][22]. Potentially, ash could also be used as a sorbent for metals from polluted waters [23][24][25][26] and, due to the high content of metals in their composition, as sorbents for some gases (e.g., hydrogen sulfide) [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development

Cieślik,

Ronda,

Grządka

et al. 2024

Toxics

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In the pursuit of environmentally and economically sustainable sewage sludge ash (SSA) management methods, researchers often employ laboratory-made SSA (L-SSA) as a substitute for industrial-made SSA (I-SSA) produced in fluidized bed furnaces. To check whether L-SSA is a material that imitates I-SSA well, the fractionation of metals whose presence is a significant problem during SSA management was performed. In addition, the grain distribution, specific surface area, and textural properties of the tested materials were examined. Differences in total Pb and Hg content and mobility of Cu, Ni, Mn, and Zn were observed between I-SSA and L-SSA. Larger particle sizes of L-SSA compared to I-SSA were confirmed, while comparable textural properties and specific surface area of both types of materials were maintained. Based on the results, it was concluded that L-SSA is chemically different compared to I-SSA, and that L-SSA should not be used as a reference in research focused on the design of SSA management methods. Moreover, fractionation of metals was performed in disposed fluidized beds (FBs), which are diverted to non-hazardous waste landfills without prior analysis. It has been proven that studied metals are present in FBs as abundantly as in SSA, while Cu, Mn, and Ni may show higher mobility than in I-SSA.

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Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development

Cieślik,

Ronda,

Grządka

et al. 2024

Toxics

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“…According to the literature review, there is a real need to provide more understanding of the influences of different kinds of additives to enhance the strength of UHPC and HPC. Also, UHPC and HPC blended with other materials will provide efficient crack resistance and can inhibit crack propagation, thereby reducing maintenance costs [49][50][51][52][53][54][55][56]. Typically, the cement content required in UHPC is high.…”

Section: Introductionmentioning

confidence: 99%

Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

2023

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Ultra-high-performance concrete (UHPC) and high-performance concrete (HPC) are widely used in construction engineering applications. The quality and economy of this type of concrete are the main challenges in real construction systems due to their expensive cost. In the present investigation, the performances of UHPC and HPC were improved using eco-friendly additives from natural sources or industrial wastes. Accordingly, different kinds of concrete mixtures were prepared with the addition of various eco-friendly materials, such as metakaolin (10, 15, and 20%), silica fume (2.5, 5, 10, and 15%), cement kiln dust (CKD) (0, 5, and 10%), and 1 vol.% of steel and polypropylene fibers. All of these materials were subjected to efficient treatment and purification processes. The results indicated that the prepared UHPC was characterized by high compression and flexural strengths. The prepared UHPC (sample CR-2) with metakaolin (10%), CKD (10%), and 1 vol.% of steel fibers provided the highest compressive strength of 135 MPa at 28 days. Moreover, the results showed that reducing the cement amounts to 750, 500, and 250 kg/m3 provided concrete with efficient structural requirements and specifications and can be characterized as UHPC and HPC. Also, the mixture (sample CM15) with a metakaolin addition of 15%, CKD of 100 kg/m3, and 1 vol.% of steel fibers showed the highest flexural strength of 19.14 MPa at 28 d. Moreover, the highest splitting tensile strength of the prepared UHPC cylinders was 9.6 MPa at 28 d for the MSS1000 sample, which consisted of 15% metakaolin, a cement content of 1000 kg/m3, silica fume of 10%, and steel fibers of 1% vol. The prepared UHPC mixtures will reduce the amount of consumed cement and the production cost, with a high performance in comparison to classical concrete. Finally, it was clear that the prepared UHPC and HPC concrete with green additions can serve efficiently in specific construction applications, with high performance, economic feasibility, and safe environmental impacts.

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Utilization of industrial wastes in non-sintered bricks: microstructure and environmental impacts

Shi,

Ma,

Zhao

et al. 2024

Environ Sci Pollut Res

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Utilization of sewage sludge ash in ultra-high performance concrete (UHPC): Microstructure and life-cycle assessment

Cited by 45 publications

References 55 publications

Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development

Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development

Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

Utilization of industrial wastes in non-sintered bricks: microstructure and environmental impacts

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