Feasibility of using marine sediments in SCC pastes as supplementary cementitious materials

Abstract

In the context of the depletion of natural geomaterials, the increasing amount of dredged sediments calls for seeking new possibilities for treating and recycling these materials as cementitious supplementary materials. The aim of this paper is to design ecological SCC pastes, which require less cement, incorporating treated marine sediments. Despite many approaches investigating the ultimate formula of self-compacting concrete (SCC), the process remains complex because it is based on many variables and components. According to the mix design method, twenty pastes were prepared with cement, superplasticizer, water, and treated marine sediments from the Dunkirk harbour (France). The pastes' fresh properties were determined by using the mini-slump cone (workability), and the Marsh cone (fluidity). Rheological properties were determined with a robust rheometer based on the Bingham model. Cohesiveness and compressive strength were tested as well. All responses were connected using ternary diagrams, which led to the definition of an optimal formula. Experimental checking was performed to validate the obtained results.

Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

“…These reductions in compressive strength were reduced to 92.73% at 90 days. These same results are consistent with what has been described in the literature regarding the substitution of cement by slag [12,68] and calcined sediments [69,70].…”

Durability and transport properties of SCC incorporating dredged sediments

“…Previous investigations on pastes and mortars [20,21] revealed that dredged marine sediments did not show negative effect on fresh properties when the water demand of sediment is taken into account. Using a multi-objective optimization for workability properties and compressive strength development at different ages, an optimal substitution content of 7% to 35% were reported in the case of binder content ranging between 380 and 600 kg/m 3 and water-to-cementitious materials (w/cm) of 0.32 and 0.34.…”

A Review of Rheological Modeling of Cement Slurry in Oil Well Applications

“…Optimization algorithms including the deterministic simplex method and the stochastic genetic method were applied to determine the parameters in the Herschel-Bulkley model for fresh cement suspensions [9]. Multi-objective optimization methods, such as support vector regression (SVR), model tress (MT), M5 model rules, mix and design approach, particle swarm optimizations (PSO) and response surface method (RSM) are also used in cement chemistry and hydration processes to obtain optimal chemical combination and proportion for better cement performance, workability, and energy consumptions [201,[301][302][303][304].…”