Construction equipment activities are a major part of many infrastructure projects. This type of equipment typically releases large quantities of green house gas (GHG) emissions. GHG emissions may come from fuel consumption. Furthermore, equipment productivity affects the fuel consumption. Thus, an estimating tool based on the construction equipment productivity rate is able to accurately assess the GHG emissions resulted from the equipment activities. This paper proposes a methodology to estimate the environmental impact for a common construction activity. This paper delivers sensitivity analysis and a case study for an excavator based on trench excavation activity. The methodology delivered in this study can be applied to a stand-alone model, or a module that is integrated with other emissions estimators. The GHG emissions are highly correlated to diesel fuel use, which is approximately 10.15 kilograms (kg) of CO₂ per gallon of diesel fuel. The results showed that the productivity rate model as the result from multiple regression analysis can be used as the basis for estimating GHG emissions, and also as the framework for developing emissions footprint and understanding the environmental impact from construction equipment activities introduction.

Heavy duty diesel (HDD) construction equipment plays an important role in building and rebuilding Indonesia’s infrastructure and has a significant impact on national energy consumption in the form of diesel fuel. This paper demonstrates an ‘energy-productivity’ (ENPROD) model, a practice-ready methodology in developing an energy estimating model for HDD equipment that establishes a baseline of current fuel use based on the equipment’s productivity rates. The model was formulated by using the productivity model to obtain the total duration of work, and combined with the NONROAD’s brake specific fuel consumption (BSFC) to gain the fuel consumption rate in term of liter per horsepower-hour (liter/hp-hr). ENPROD model is good to be used as a benchmark for estimating fuel use from some certain types of construction equipment performing earthwork activities. Based on the methodology presented in this paper, the results revealed several trends related to total fuel use of the equipment.

Under support from the Islamic Development Bank (IDB), Universitas Negeri Malang (UM) is going to develop two new integrated classroom buildings, which consist of not only classrooms, but also seminar rooms, laboratories, lecturer’s rooms, educational studios, and auditoria. As an approach to make the buildings gaining the green building certificate, the rating tools are selected from the Green Building Council Indonesia (GBCI). One of the parameters used in the rating tools are how the buildings manage its water resources, as rated from water conservation methods and techniques. The purpose of the research is to analyse the design of the new buildings, particularly the methods in water conservation to be rated in greenship for new building design. The data are obtained from all detailed engineering design documents of the buildings, which include working drawings, detailed specifications, and bill of quantity. By using parameters stated in the GBCI’s rating tools, methods of water conservation are analysed to gain the targeted score for fulfilling the specific level of greenship.

To fosterUniversitas Negeri Malang(UM) as the Center of Excellence in Learning Innovation, with the support from the Islamic Development Bank (IDB), two 9-storeys integrated classroom buildings will be built, having the total built area about 44,800 sqm, which are divided exactly in two rectangle-shaped towering blocks. The buildings are projected to have green building status for Design Recognition (DR) by approaching GBCI’s greenship rating system. By using DED documents of the buildings, this study analyzes technical and engineering aspects to fulfill greenship requirements and recommends a specific level of greenship. The results show that overall targeted score is 47 and recommend Gold level of greenship.

Most tall buildings use glass as its façade and exterior materials, which makes the building’s envelope is exposed to heat penetration. It is important to select and design the proportion between transparent and opaque materials for building façade to reduce the heat gain from outside, which is strategic to conserve the energy use for tall buildings. This study is aimed to observe the use of building façade materials in accordance with the strategic effort to reduce the heat gain in order to conserve the energy for AC system. The façade design modification is calculated by using Overall Thermal Transfer Value (OTTV) method in compliance with the Indonesia’s National Standard of Energy Conservation for Tall Buildings. The results show that the modification on façade design can reduce the heat gain and improve thermal performance of the building. There is a dramatic change of OTTV from 124.40 w/m² on original design to 27.73 w/m² after several steps of façade modification. The biggest reductions of OTTV is obtained when modifications on openings are applied. Since the heat transmission is mainly coming into buildings through openings, modifications on glass and windows are the keys. The change of glass material, from clear-glass to those with lower shading coefficient (SC) gives reduction of 37.52 w/m².

Under the support from the Islamic Development Bank (IDB), Universitas Negeri Malang (UM) is going to build two-identical nine storey integrated classroom buildings. The buildings were designed to have green building certificate by proposing and fulfilling the requirements from the Green Building Council Indonesia (GBCI) rating system. For design recognition (DR) phase, the system requires efforts and measures in energy efficiency. The paper analyses all design aspects and criteria included in the working drawings, technical specifications, and bill of quantities as provided in the buildings detailed-engineering-design (DED). The analysis covers the calculation of overall thermal transfer value (OTTV), artificial lighting, vertical transportation, and air conditioning system. By using energy modelling software, the OTTV for Building A and Building B, with 19,445.13 m2 of total floor area using VRF-AC system, are 31.78 W/m2 and 33.48 W/m2 respectively. The proposed annual energy use is 3510.90 MWh with the index of energy consumption is 180.55 kWh/m2 per-year. The results showed that by achieving 32.58% of energy efficiency, the DR of UM’s two classroom buildings is affordable to attain 11 points in the rating system.