REDUCTION OF CONSTRUCTION WASTE IN FLAT HOUSING CONSTRUCTION WITH MODULAR SYSTEM

• Main Author: Nur Afifah, Salma
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71090
• Institution: Institut Teknologi Bandung

In the construction industry, one of the buildings that will continue to grow is residential buildings. This is driven by the increasing need for housing due to the rate of population growth from birth and urbanization. Handling by the government to address housing needs and land shortages is vertical housing or flats, such as the “Program Sejuta Rumah” which has been launched since 2015. This is also in line with the Plan of the Directorate General of Housing of the Ministry of Public Works and Public Housing which targets 51,340 housing units to be built stack. This large number of developments needs to be accompanied by efforts to minimize the environmental impacts that will arise, one of which is construction waste. The construction industry contributes a large volume of waste, and it increases every year. The waste that arises from the construction and demolition process has an impact on the environment and participates in environmental pollution. The high amount of construction waste is driven by the use of construction materials which also continues to increase due to construction developments, especially buildings. Research related to the reduction of existing construction waste focuses more on waste reduction management carried out at the construction stage. In fact, this reduction effort can get maximum results if it is carried out at each stage of the building's life cycle. Especially at the planning stage which is an important stage because it can identify and plan how a building is built and reduce problems that will arise because it has been planned properly. From the research that has been done, there are several efforts to handle waste at the design stage, one of which is modular system. This research was conducted to see how far the effect of modular design on the amount of construction waste that appears. The case study taken is a modular apartment building that has been built in Indonesia. Some limitations in this study are that the type of construction work carried out is limited only to structural and architectural work, and the analysis of the amount of construction waste is limited to the main material. In this study, quantitative and qualitative research methods were carried out. The research was conducted in five stages: (1) identifying the modular system in Indonesia; (2) identify the suitability of the modular system with the material modules in the modular flat units; (3) identify the application of the modular system in the case study building by identifying the suitability of the modular system with the material modules in the case study building and identifying the application of prefabricated components in the case study building; (4) analyze the relationship between the module system and construction waste; and (5) verifying the results of the research by interviewing stakeholders in the construction of this case study building. Phase one was carried out qualitatively with a literature study. Stage two, three, and four using quantitative with simple calculations and regression analysis using AutoCAD and Ms. Excel software, then presented with Sketchup and Photoshop software. Stage five was carried out qualitatively with content and distribution analysis. The results of the study showed that the suitability of the module affects the amount of construction waste. The application of the Mh and Mv module systems in the case study buildings reached 77% and 80%, and the use of prefabrication components reached an average of 66%. In addition, this study also showed that the modular system in Indonesia is not in accordance with the module concept, both in field modules and space modules. The Mh and Mv modules are also not in accordance with the existing material modules, so that there is a potential for construction waste to emerge from leftover materials. The challenge in implementing a modular system in Indonesia is on stakeholders because it requires cooperation and coordination from all parties. Beside that, there are also challenges from technology, design, standardization, and location.