Recycling of dredged sediment as a raw material for the manufacture of Portland cement – Numerical modeling of the hydration of synthesized cement using the CEMHYD3D code

Chu, Duc Chinh; Kleib, Joelle; Amar, Mouhamadou; Benzerzour, M.; Abriak, N.‐E.

doi:10.1016/j.jobe.2021.103871

Cited by 19 publications

(21 citation statements)

References 27 publications

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“…The chemical composition and proportion of each component in the raw mixture are given in Table 1. The process of clinker production in the laboratory is described in previous studies [41,42] and summarized in Figure 2. After mixing all the raw components through a wet process to better homogenize the meal, this raw mixture was calcined in a static kiln with the same heating process used in the previous studies [41,42].…”

Section: Raw Materials and Multi-composite Cement Production Methodsmentioning

confidence: 99%

Efficient Multi-Composite Cement Made of Granulated Blast Furnace Slag (GBFS) and Flash-calcined Sediment

Benzerzour,

Chu,

Amar

et al. 2023

Civ Eng J

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The objectives of this study were to find out in detail how well granulated blast furnace slag (GBFS) could be replaced by flash-calcined sediment (SF sediment) in terms of hydration kinetics and mechanical-microstructural properties when developing an eco-friendly cement binder. The results indicated that the SF sediment substitution with a rate of 25% wt significantly improved the hydration kinetics of cement compared to the reference. This contributed to a considerable enhancement of the mechanical-microstructural properties of the mortar containing the SF sediment. By comparison with the reference, the strength of multi-composite cement-based mortar increased by 33% at 2 days and by 4.5% at 28 days, whereas its porosity decreased by 16.32% and by 12.44% for the same period. The SEM-EDS result showed that the SF sediment substitution did not significantly modify the chemical composition of the C-S-H phase, with a Ca/Si ratio range of 1.82 to 2.84 for both cement pastes. Moreover, Mg2+ and Al3+ions were two principal elements incorporated in C-S-H gels, with different ratios depending on the Ca/Si ratio of C-S-H gels. A novel model established from a combination of the curve fitting method and Power’s approach allowed for accurate prediction of the strength development of multi-composite cement-based mortars. Overall, the SF sediment substitution could be considered a promising option to develop a more eco-friendly cement binder, while the novel approach could be used as a reliable model for the strength prediction of blended cement. Doi: 10.28991/CEJ-2023-09-11-02 Full Text: PDF

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Section: Raw Materials and Multi-composite Cement Production Methodsmentioning

confidence: 99%

Efficient Multi-Composite Cement Made of Granulated Blast Furnace Slag (GBFS) and Flash-calcined Sediment

Benzerzour,

Chu,

Amar

et al. 2023

Civ Eng J

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“…For example, the river sediment has been selected and considered as the primary raw material for building materials [52]. Dredged sediment as a raw material was reused for Portland cement production [53]. Aluminate cement substitution was tested for performance changes [54].…”

Section: Alternative Resources Reuse Strategiesmentioning

confidence: 99%

Sustainability Investigation in the Building Cement Production System Based on the LCA-Emergy Method

Wang

Liu²,

Zhang³

et al. 2022

Sustainability

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As one of the highest energy and resource consumption industries in China, discussion on the sustainability of the cement production system has great significance. This study conducted sustainable calculations and analyses for cement production systems based on the emergy method. This study also considers the sustainability impact of clean energy on the overall cement production system. Through a series of sustainable indicator measurements, the results prove that: (1) the two primary sections, non-renewable resource and non-renewable energy, contribute 88.6% and 11.1% of the emergy proportion, respectively; (2) the emergy sustainability indicator (ESI) was only 0.058, which is significantly less than the standard; (3) through the analysis of eight hypotheses, a very small change between the absolute values was found, which demonstrates that the sensitivity changes are within acceptable limits for the cement production system; and (4) by integrating the biological power generation subsystem, sustainability has been optimized in the cement production system. Finally, two ameliorated strategies are discussed in this paper for the better sustainability performance of the cement production system in the future.

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“…Dredged sediment can be used as an alternative source of conventional aggregate used for the manufacture of concrete or mortar [24,60,[71][72][73][74] by acting as a substitute for sand. It can also partially replace raw materials for cement production [75][76][77]; this often requires adequate treatment before use. More studies have focused on the reuse of dredged sediment as foundation or base layers in road engineering [34,[78][79][80][81][82][83].…”

Section: Introductionmentioning

confidence: 99%

Characterizing Harbor Dredged Sediment for Sustainable Reuse as Construction Material

et al. 2023

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An unprecedented rate of construction has profoundly increased the risk of scarcity of natural resources and threatened ecosystem sustainability. To establish an effective sustainable development policy, it is imperative to promote the use of responsible production channels, including waste recycling. Reuse of harbor dredged sediment is commonly investigated as a valuable alternative to non-renewable natural resources needed for construction. Sediment characterization is decisive in the valorization process, aiming to identify potential recycling paths. Existing research efforts, however, have rarely investigated case studies in developing countries. Moreover, they have tended to focus on the technical aspects, ignoring economic feasibility, which carries important implications. This paper fills this gap first by meticulously selecting laboratory tests for characterization within the means available in developing countries and second by conducting a cost-benefit analysis. The port of Safi, Morocco, was chosen for the implementation of the adopted approach. Results showed that dredged sediment is a sand readily reusable as a construction aggregate. Several applications are possible, the most interesting one being concrete works, as a substitute for conventional sand. While treatment by washing and dehydrating proved necessary, cost-benefit analysis confirmed the profitability of recycling. Hence, beneficial reuse of dredged sediment as construction material is technically and economically feasible.

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Recycling of dredged sediment as a raw material for the manufacture of Portland cement – Numerical modeling of the hydration of synthesized cement using the CEMHYD3D code

Cited by 19 publications

References 27 publications

Efficient Multi-Composite Cement Made of Granulated Blast Furnace Slag (GBFS) and Flash-calcined Sediment

Efficient Multi-Composite Cement Made of Granulated Blast Furnace Slag (GBFS) and Flash-calcined Sediment

Sustainability Investigation in the Building Cement Production System Based on the LCA-Emergy Method

Characterizing Harbor Dredged Sediment for Sustainable Reuse as Construction Material

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