The compressive strength of concrete according to certain codes can be based on the compressive strength of unconfined plain standard concrete cylinders tests at the age of 28 days. In this paper, the standard concrete cylinders were spirally confined with steel bars and with/without hooked-end steel fibers. The influence of the use of hooked-end steel fiber in spirally confined concrete with various pitches was investigated. It can be seen that the use of hooked-end steel fiber contributes significantly in improving both compressive strength and ductility of concrete. The compressive strength and ductility of steel fibered concrete also increase with the reduction of the spiral’s pitch.
The construction industry is one of the most at risk to worker safety. The number of work accidents in Indonesia continues to increase so that by 2021 the number of work accidents will reach 234,270 cases. Therefore, in-depth research is needed to maintain the safety of all workers. Recognizing the factors that cause work accidents helps stakeholders take preventive action. It is necessary to increase worker safety behaviour by identifying its factors. Both those that occur in casual workers and permanent workers. Therefore, it is important to see whether employment status affects the safety behaviour of construction workers so that preventive measures can be taken as a form of prevention of work accidents. The research objective was to analyze the status of workers on the safety behaviour of construction workers. Data was collected through a survey method of 300 construction workers in the cities of Surabaya, Malang, and Batu in East Java, Indonesia. The results of the study show that worker status has a positive effect on construction work safety behaviour. This means that the higher the Employee Status will increase the Safety Behavior variable, with a path coefficient of 0.390. Among the indicators that are dominant in measuring the ES Worker Status construct is the Type of Worker, with the highest loading factor of 0.842. Thus, if the management wants to raise the value of the variable Safety Behavior through improving aspects of Employee Status, what need to be evaluated as a top priority is the Employee Type. The results of this study can be used as a reference in setting policies related to worker safety. Project management can determine what strategic steps need to be taken for construction workers with different types of employee statuses. so as to increase worker awareness of a culture of safety behavior.
Technological developments, especially in the construction sector, have developed rapidly. The construction industry is one of the activities that consume energy, resources, and affects the environment. Therefore it is important to increase innovation and solutions to achieve sustainability standards. Several efforts were made to maintain environmental sustainability against global problems, namely the selection of building materials through an analysis of the impact of building materials on the environment called a Life Cycle Assessment (LCA). In this study, two types of curtain wall system materials, type (A), reinforced concrete, final coating, and type (B) brick, reinforced concrete, ceramic, and mortar will be compared. The method used in the completion of this research is a full building supply system in one way, namely the collaboration between Autodesk Revit and Tally which will then be analyzed again. The first step is to determine the type of material by calculating the total material requirements to be used or by modeling the building using Autodesk Revit. From the total volume of material that will be analyzed the impact of the building life cycle based on ISO 14040. The final objective of this research is to get the best alternative from the second material above. The results of the analysis supported the type (B) material which has a smaller effect than the type (A) material on the main environment that regulates global.
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