Concrete is a construction material that has been used widely in various constructions. For constructions located in seismic areas, require a material that behaves ductile during an earthquake. To obtain ductile concrete behavior, it can be substituted materials such as steel fiber and waste rubber tires. This study aims to determine the flexural toughness of concrete with steel fiber and waste rubber tires substitution. Specimens with dimensions of 100 x 100 x 400 mm with the substitution of 0%, 2.5%, 5%, and 7.5% of Dramix Steel Fiber; 10%, 20%, and 30% of crumb rubber and tire chips. The greater amount of steel fibers in the concrete, the greater value of flexural toughness. The substitution of 7.5% steel fiber, increasing the value of flexural toughness three times than the control specimens. While the number of crumb rubber and tire chips are variations, giving a value of varying flexural toughness. Flexural toughness achieved optimum value for substitution of 10% crumb rubber, where the energy absorption is 6386.225 Nmm.
This research is to identify the advantages of integrating quality management systems, Occupational Health and Safety management systems, and Environmental management systems (QHSE Management System). The study was conducted at a State-Owned Enterprises Enterprise. The study will compare All Management Systems with Existing in Wijaya Karya Company with ISO 9001 System on quality management system, ISO 45001 on Health and Safety management system, and ISO 14001 on Environmental management system. The study was conducted by Archive Analysis and Literature studies. Previous literature studies show that the clauses that make up the integration of the QHSE Management System are scope, leadership, policy, planning, support, operations, performance evaluation, and improvement.
As a developing country, Indonesia has a very rapid infrastructure development which causes the number of construction projects to increase. Green Construction is a reference for construction projects to keep paying attention to environmental sustainability that is attempted by PT. PP (Persero) Tbk. in the construction project of Makassar Vida view Apartment. The Green Construction Assessment (MAGC) model is an assessment standard developed by Ervianto from the Green Contractor Assessment Sheet and GREENSHIP V 1.0. This assessment model was developed in order to know the role of the contractor in applying green construction to the project being handled. This study aims to find out what the application and how much is achieved from PT. PP (Persero) Tbk. in implementing Green construction based on the Green Construction Assessment Model (MAGC). As a result, the Vida View Makassar Apartment Project by PT. PP (Persero) Tbk. has implemented Green Construction in its construction process where this is evidenced by the implementation of 7 aspects of Green Construction by the Green Construction (MAGC) Assessment Model. From the results of the study, Green Construction Value (NGC) data was obtained at 15.83 from a maximum value of 21.92 which is 72.22% of the maximum value. The biggest achievement of NGC for projects in Indonesia is 15.47 and it can be concluded that the achievements achieved by PT. PP (Persero) Tbk. already good at implementing Green Construction.
Municipal authorities in developing countries face a challenge in managing solid waste. The challenging is mainly due to the increasing generation of waste that is not followed by the improvement of infrastructure and operational systems. The city of Makassar has also experienced the problem. Solid waste, especially in the traditional market, has not adequately managed, resulting in a complex waste management issue. The study is purposely to calculate the volume of solid waste generation and to assess the infrastructure and management systems, including trash cans, collection, temporary solid waste disposal in the form of container and transportation. The results show as follows: The total volume of Niaga Daya’s market solid waste is 9000 l/day. The infrastructure required is 600 pieces of trash cans in which every stall needs 1, four carts, and two containers, transporting solid waste once a day to landfill. Optimization solid waste operational activities will be maximized by adding the number of service rations, additional work time, adding labor, and increasing the number of temporary solid waste disposal and transportation.
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