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Concreting operations – the relationship between unit costs and unit emissions

Published on Apr 9, 2018in The international journal of construction management
· DOI :10.1080/15623599.2018.1452095
Nur Kamaliah Mustaffa2
Estimated H-index: 2
(UNSW: University of New South Wales),
David G. Carmichael15
Estimated H-index: 15
(UNSW: University of New South Wales)
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Abstract
ABSTRACTThe reduction of emissions within construction is seen as an agreed direction worldwide. In this light, the paper examines unit emissions in concreting operations, and provides guidelines for their reduction. Unit emissions and unit costs are calculated through a queuing model for concreting operations where trucks cycle between a batching plant and site. A time-production constraint exists. Sensitivity-style analyses are used to evaluate the influence of truck capacity, unloading policy, pumping rate (or the equivalent for crane usage), travel time and fuel type on optimum unit emissions and unit cost. It is demonstrated that the optimum truck fleet size for unit emissions is the same as that for unit cost under a range of different operation parameters. The results indicate the most environmentally aware way to configure and manage concreting operations. The paper demonstrates that by not operating at minimum unit cost, then emissions increase. To date, the foci of studies involving concreting o...
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References52
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Published on Dec 1, 2017in Automation in Construction 4.31
Zhenyuan Liu3
Estimated H-index: 3
(HUST: Huazhong University of Science and Technology),
Yakun Zhang1
Estimated H-index: 1
(HUST: Huazhong University of Science and Technology)
+ 1 AuthorsXiaolu Zhou1
Estimated H-index: 1
(HUST: Huazhong University of Science and Technology)
Abstract In this study, the problem of integration of ready-mixed concrete (RMC) production scheduling and truck and pump dispatching in an RMC plant with multiple mixers is focused upon. A time-space network model, which combines RMC production and vehicle dispatching, is proposed. A heuristic algorithm with eight sets of conjoint priority rules for production scheduling, truck and pump dispatching, and mixer scheduling is developed to solve the problem. Computational experiments are conducted ...
Published on Dec 1, 2016
Mario Galić1
Estimated H-index: 1
,
Ivan Kraus2
Estimated H-index: 2
This paper introduces a discrete simulation model for solving routing and network material flow problems in construction projects. Before the description of the model a detailed literature review is provided. The model is verified using a case study of solving the ready-mix concrete network flow and routing problem in metropolitan area in Croatia. Within this study real-time input parameters were taken into account. Simulation model is structured in Enterprise Dynamics simulation software and Mi...
Published on Oct 19, 2016
Shangyao Yan1
Estimated H-index: 1
(NCU: National Central University),
Wei-Chung Wang1
Estimated H-index: 1
(NCU: National Central University)
+ 1 AuthorsHan-Chun Lin1
Estimated H-index: 1
(NCU: National Central University)
AbstractThe purpose of this study is to develop a systematic scheduling model that will help ready mixed concrete (RMC) carriers/suppliers with effective scheduling adjustment after temporary breakdown of mixers under stochastic travel times. The model is formulated as a mixed integer network flow problem with side constraints that is characterized as NP-hard. The authors employ problem decomposition and relaxation techniques, with a mathematical programing solver, to develop an algorithm that i...
Published on Jul 4, 2016
Daniel Jukic1
Estimated H-index: 1
(UNSW: University of New South Wales),
David G. Carmichael1
Estimated H-index: 1
Purpose – It is postulated that operator-dependent factors have a substantial impact on the fuel consumption and emissions of heavy-duty construction vehicles, such that by adopting different operator practices, savings in fuel used and lower emissions and costs can be achieved. Accordingly, the purpose of this paper is to examine the emission and cost effects of a driver-training programme aimed at fuel efficiency and construction truck operators. Design/methodology/approach – A study was condu...
Alireza S. Kaboli5
Estimated H-index: 5
(UNSW: University of New South Wales),
David G. Carmichael15
Estimated H-index: 15
(UNSW: University of New South Wales)
Earthmoving equipment is a large generator of emissions. Accordingly, it is important to understand the underlying parameters affecting performance, in order to operate the equipment in the most emissions-efficient way. The paper aims to provide an original examination of the truck-oriented earthmoving parameters of haul grade, payload and truck type and their little known influence on fuel use and emissions. Observed field data ‒ on fuel use, payloads and cycle times from four different earthmo...
Guo Chen Zhang1
Estimated H-index: 1
(Taiyuan University of Science and Technology),
Jian Chao Zeng1
Estimated H-index: 1
(Taiyuan University of Science and Technology),
Jianhua Zhang1
Estimated H-index: 1
(Taiyuan University of Science and Technology)
This research addresses the ready-mixed concrete RMC vehicle scheduling problem with stochastic transportation time. In the paper, transportation time of RMC vehicle is modelled as stochastic and time-dependent. This study establishes a chance constrained programming model for the ready-mixed concrete vehicle scheduling problem. A genetic algorithm is designed by combining the heuristic and hash function searching strategy. The results show that the proposed algorithm is able to solve the proble...
Published on Jun 1, 2015in Journal of building engineering
Mojtaba Maghrebi9
Estimated H-index: 9
(UNSW: University of New South Wales),
S. Travis Waller28
Estimated H-index: 28
(UNSW: University of New South Wales),
Claude Sammut20
Estimated H-index: 20
(UNSW: University of New South Wales)
Abstract Concrete delivery dispatching suffers from a lack of practical solutions and therefore, in the absence of automatic solutions, experts are hired to handle this task. In addition, the concrete delivery dispatching problem can be modelled mathematically but it can only solve up to medium sizes of this problem within a practical time. This paper attempts to answer the question of how much we can rely on experts' decisions. First, the concrete delivery problem is presented. Second, a benchm...
Published on May 1, 2015in Reliability Engineering & System Safety 4.04
Jui-Sheng Chou25
Estimated H-index: 25
(NTUST: National Taiwan University of Science and Technology),
Citra S. Ongkowijoyo2
Estimated H-index: 2
(NTUST: National Taiwan University of Science and Technology)
Corporate competitiveness is heavily influenced by the information acquired, processed, utilized and transferred by professional staff involved in the supply chain. This paper develops a decision aid for selecting on-site ready-mix concrete (RMC) unloading type in decision making situations involving multiple stakeholders and evaluation criteria. The uncertainty of criteria weights set by expert judgment can be transformed in random ways based on the probabilistic virtual-scale method within a p...
Published on Mar 1, 2015in Journal of Computing in Civil Engineering 2.55
Yan Wang16
Estimated H-index: 16
,
Hong Hao45
Estimated H-index: 45
Civil infrastructures are critical to every nation, due to their substantial investment, long service period, and enormous negative impacts after failure. However, they inevitably deteriorate during their service lives. Therefore, methods capable of assessing conditions and identifying damage in a structure timely and accurately have drawn increasing attention. Recently, compressive sensing (CS), a significant breakthrough in signal processing, has been proposed to capture and represent compress...
Published on Mar 1, 2015in Journal of Computing in Civil Engineering 2.55
Changbum R. Ahn13
Estimated H-index: 13
(Durham University),
SangHyun Lee26
Estimated H-index: 26
(UM: University of Michigan),
Feniosky Pefia-Mora33
Estimated H-index: 33
(Columbia University)
AbstractMonitoring the operational efficiency of construction equipment offers great opportunities to enhance not only the productivity but also the environmental performance of construction operations. However, existing enabling technologies still suffer from a lack of economic feasibility, as well as technological compatibility with equipment fleets that are outdated or that consist of diverse manufacturers’ models. In this context, this paper examines the feasibility of measuring the operatio...
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