Optimizing transportation in the precast concrete plants

Abstract

AbstractIn addition to aggregates, cement, water and reinforcement, transportation is one of the key aspects in operating a precast concrete manufacturing plant. The cost of transportation in precast concrete manufacturing plants is closely related to electricity prices. Despite intensive efforts to implement renewable energy sources, still, 2/3 are non-renewable sources, such as coal, natural gas and oil. Taking into account the negative impact on the environment associated with the exploration of non-renewable resources and the observed increase in electricity prices, it is necessary to find alternative solutions that minimize environmental and financial costs. The paper presents a model for the selection of optimal transportation system inside the precast concrete manufacturing plant. It ensures the fullest possible use of equipment resources, in this case, rail trolleys capacity, and minimization of their journey number. The paper describes three internal transportation systems that are shuttle, radial and circular. Moreover, the paper contains a case study, concerning the determination of the optimal transportation program between workstations. As a result of the analyses carried out, a model was developed, including the strategy of journey planning with the assumption of minimum costs and maximum use of the capacity of rail trolleys.