Évaluation des bénéfices économiques et environnementaux de l'intégration à la production de béton prêt à l'emploi d'un système de contrôle continu situé à l'intérieur d'une bétonnière

Authors: Hilt, Mélodie
Advisor: Jolin, MarcBissonnette, Benoît
Abstract: Several factors can affect the behavior and properties of fresh concrete during transportation from the production plant to the job site, such as weather conditions, delivery conditions or the human factor. To overcome this phenomenon, Denis Beaupré has developed a rheological probe that is fixed inside the drum of concrete mixers, allowing continuous monitoring of the properties of fresh concrete. In this context, this study proposes an assessment of the economic and environmental benefits of integrating this system into concrete production. The economic impact is first studied by comparing the time spent by trucks with and without probe at 4 distinct stages of the delivery process. On-site truck waiting time is reduced by a minimum of 24.4% in the study, thanks to the use of the probe. The optimization of time generates an immediate economic gain of more than 180 000 dollars per year for a single concrete production plant. The experimental part showed that the priming is influenced linearly by the value of the slump of the concrete whereas the unloading volume per turn seems to be more influenced by the truck itself. For the truck and the subsidence range studied, the concrete pressure exerted on the probe is no longer detected below 3m3 of loading. The Environmental Product Declaration of Ready-Mix Concrete is used to quantify potential gains. The environmental impact of 1 m3 of fresh concrete is improved by 9% with the assumption that the probe can reduce the margin of safety of the expected compressive strength at 28 days. Finally, reducing this margin of safety by 5 MPa thanks to the probe has substantially the same environmental benefit as replacing 15% of the cement with fly ash.
Document Type: Mémoire de maîtrise
Issue Date: 2019
Open Access Date: 26 April 2019
Permalink: http://hdl.handle.net/20.500.11794/34581
Grantor: Université Laval
Collection:Thèses et mémoires

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