Abstract
Global warming is a problem that impacts in many various sectors include construction. Emission of carbon dioxide (CO2), one of causes of global warming, can be emitted from construction projects. The alternative method that able to calculate CO2 emissions is Life Cycle Assessment approach. The purpose of this study is to predict CO2 emission from all beam types using network flow diagram of Life Cycle Assessment in real estate project of 216 m2 type house. The analysis calculated by SimaPro 9.0 software. The results of this research indicated that from four types of beams used in real estate, beam-type 25/50 and beam-type 15/30 have the largest percentage of CO2 emission in 41.9% (4,610 kg CO2-eq) and 39.9% (4,380 kg CO2-eq) of the total CO2 emission of all beam types, respectively. A conventional method of beam construction resulted CO2-eq emission that come from rebar of 31.20% (3.426 kg CO2-eq) and cement 1.09% (120 kg CO2-eq). For the ready mix method, the largest CO2-eq emission are dominated by ready mix at 20.20% (2,200 kg CO2-eq) and wooden blocks 46.90% (5,150 kg CO2-eq).
Highlights
Construction projects are considered to have a major role in environmental changes on the surface of the earth
Life Cycle Assessment (LCA) is one of method to find out how the goods or services of a product are identified from beginning to end, to find out the effect caused, and to analyze the percentage of the impact
Life-Cycle Assessment (LCA) is a method used to evaluate the consumption of energy and raw materials, emissions released to the environment, and other waste related to the life cycle of a product or system
Summary
Construction projects are considered to have a major role in environmental changes on the surface of the earth. The construction materials have significant sources of carbon dioxide (CO2) emissions that derived from cement (30.3%), ceramics (20.3%) and steel (18.7%). Two of three elements namely cement and steel are the main materials in beam production [2]. The natural exploitation, transportation, production, and construction of beam indicated generate the CO2 emission. It requires an appropriate and fast analysis method in calculating its environmental impact. Life Cycle Assessment (LCA) is one of method to find out how the goods or services of a product are identified from beginning to end, to find out the effect caused, and to analyze the percentage of the impact. LCA is a method used to assess the environmental impacts associated with a product or service. By using the LCA of beam in network flow diagram, the CO2 emission can be calculated and alternative solutions can be provided [3]
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