Mass Concrete Curing Management Based on Ubiquitous Computing.
ABSTRACT With the spread of networking and computing technologies, ubiquitous computing is a concept attracting increasing attention in industrial development and innovation. In this study, a mass concrete curing management system (CMS) is introduced to investigate the possibility of applying ubiquitous computing to jobsite project execution. The proposed CMS consists of three parts—wireless data acquisition, strength estimation, and an alarm. A case study is performed to validate the CMS in the mat foundation of a high-rise building construction. This system will allow the project engineers or managers to make timely decisions about the cooling operation of the pipe cooling system, which removes hydration heat from the concrete with embedded cooling pipes in the structure, and about the timing of formwork stripping. This suggests that the productivity and efficiency of construction management can be improved by adopting a ubiquitous computing environment in construction.
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ABSTRACT: The application of mobile computing in construction is becoming a major research theme in the domain of Information Technology in Construction. However, most research in this area focuses on a detailed aspect or single facet of a mobile computing technology. This paper introduces a framework for the implementation of mobile computing on construction sites, which comprises an application model and a technical model. The application model identifies the features of mobile computing, construction personnel, construction information, and construction sites, and explores the interactions that are likely to affect the implementation of mobile computing. The technological model generalizes mobile computing technologies and gives system designers a clear structure for designing mobile computing systems from a technical perspective. Finally, a case study of a real construction situation is used to validate this framework.Research Highlights► Mobile computing has a great potential to improve on-site construction information management. ► We develop a framework for the use of mobile computing on construction sites. ► It can provide the ways using mobile computing in the construction industry. ► It can help users to select a mobile computing strategy for managing information. ► It provides guidance for users to select appropriate mobile computing technologies.Automation in Construction 11/2011; 20(7):776-788. DOI:10.1016/j.autcon.2011.01.002 · 1.82 Impact Factor
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ABSTRACT: In this article, a geometrical optimization procedure using biconical tapered fiber sensors is proposed for monitoring the early‐age curing temperatures of concrete specimens. The geometries of the sensors are theoretically optimized by the ray‐tracing theory. The results of the theoretical analysis show that the performance of the sensors is heavily influenced by Evanescent Waves, which are due to the tunneling rays and are fully escaped by tapering the fiber. The effects of the geometrical parameters, including the taper ratios, taper lengths, and ray launch angles, as well as the surrounding temperatures, on the behavior of the sensors are studied numerically. The numerical results demonstrate that higher performance of the proposed optimized sensors can be achieved by a longer taper length and smaller taper ratio combined with an initial ray launching angle of 0.01 rad. An experimental study on early‐age curing temperature monitoring of concrete specimens with the biconical tapered fiber sensors was carried out. The experimental measurements agree well with the theoretical results.Computer-Aided Civil and Infrastructure Engineering 08/2013; 28(7). DOI:10.1111/mice.12022 · 5.63 Impact Factor
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ABSTRACT: Purpose – The purpose of this paper is to develop a model for the use of mobile computing in the management of on-site construction information and communication. Design/methodology/approach – The research strategy contains three steps: a pilot study for the first stage, a survey that investigated the information needs of particular users and the nature of on-site information, and finally the development of a model and the validation and evaluation by operational scenarios. Findings – The developed model explores how mobile computing can be used on construction sites to manage on-site information. This model, firstly, identifies the key factors of mobile computer, wireless network, mobile application, construction personnel, construction information, and construction site; secondly it describes the relationships and interactions among these factors. Based on the model, the selection process for mobile computing strategy includes the clarification of information management process, the creations of overview for mobile computing solution, the identification of mobile computing strategy, and the selection of appropriate mobile computing technology. Originality/value – The developed model explores the general concepts and the internal relationships at the two areas of mobile computing and construction site information management. The application of the model can help users to select mobile computing strategies for managing on-site construction information based on the characteristics of their projects.Engineering Construction & Architectural Management 01/2008; 15(1):7-20. DOI:10.1108/09699980810842034