The effects of such environmental conditions as alkali media at temperatures of 23℃, 40℃, and 60℃ were investigated on the fiber reinforced polymer-to-concrete bond strength. For this purpose, 42 specimens were strengthened via the externally bonded reinforcement and the externally bonded reinforcement on grooves techniques. The specimens were later subjected to the single-shear test after the specified durations of exposure to an alkaline medium. The particle image velocimetry technique was used to investigate such bond characteristics of the strengthened specimens as load-slip behavior, strain profiles, and strain fields along the fiber reinforced polymer-to-concrete bond. Experimental results showed that the specimens strengthened via the externally bonded reinforcement on grooves method exhibited ultimate bond loads by up to 50% higher than those strengthened via the externally bonded reinforcement method.

In terms of safety management, the implementation of industrial parks construction projects (IPCPs) is incredibly challenging due to the special working conditions and the specific type of use of the buildings. On the other hand, the possibility of causing accidents in these areas based on human errors is high and important for project execution due to the risks of human errors and financial losses. Therefore, this study tries to fill this existing research gap by identifying and evaluating the effective key factors leading to the occurrence of construction accidents caused by human errors in the development of IPCPs. After a holistic review of the reported literature, four rounds of fuzzy Delphi survey were launched to capture the individual opinions and feedback from various project experts. Accordingly, 41 key factors affecting human errors in the implementation of industrial parks construction projects in Iran were identified and classified into nine main groups of wrong actions, observations/interpretations, planning/processes, equipment, organization, individual activities, environmental conditions, rescue, and technology. Then, the step-wise weight assessment ratio analysis (SWARA) method was adopted to rate and rank the identified factors of human errors in the implementation of IPCPs in Iran. The research findings indicated that among the elicited factors, time factor (0.1226), delayed interpretation (0.1080), and incorrect diagnosis/prediction (0.0990) are the three most crucial factors leading to human errors in the implementation of IPCPs in Iran. The results of this research study have provided various major project stakeholders with an effective decision-aid tool to make better-informed decisions in managing and reducing the occurrence of construction site accidents particularly caused by human errors associated with IPCPs.

The implementation of construction projects is always associated with several incidents for various reasons. Previous research studies advocated that human errors are one of the main causes of accidents in these projects. This paper aims to determine the effective factors leading to the occurrence of accidents caused by human errors in Industrial Parks Construction Projects (IPCPs) based in Iran. For this purpose, four rounds of the fuzzy Delphi survey were conducted with the presence of fifteen experienced experts engaged in the HSEE (health, safety, environment and energy) department of Industrial Parks in Iran. The reliability and validity of the questionnaire were reviewed and confirmed. Based on the results of the Delphi survey, forty-one factors contributing to human errors in the implementation of IPCPs were determined and classified into nine main groups. The survey findings manifested that the identified effective factors have a strong effect on the occurrence of construction accidents caused by human errors. The results of this research study have provided various major project stakeholders and safety managers with a useful decision-aid tool to make more pragmatic decisions in managing, reducing and avoiding the occurrence of construction site accidents particularly caused by human errors associated with IPCPs.