scholarly journals Estimating carbon emission of rigid pavement: a case study of Palur Flyover

2020 ◽  
Vol 202 ◽  
pp. 02011
Author(s):  
Jati Utomo Dwi Hatmoko ◽  
Subrata Aditama K.A. Uda ◽  
Apsari Setiawati ◽  
Stefanus Catur Adi Prasetyo
Keyword(s):  
Co2 Emissions ◽  
Construction Process ◽  
Rigid Pavement ◽  
Material Production ◽  
Transportation Process ◽  
Material Transportation ◽  
Project Data ◽  
Building Demolition ◽  
Steel Rebars

All construction activities will inevitably produce CO2 emissions from the production process of materials, transportation, the usage of plant and equipment, the construction process, up to building demolition. Therefore, it is very important to understand the construction process and the amount of CO2 emissions released at each stage of the construction process. This research aims to estimate the amount of CO2 emissions during the construction process of a rigid pavement project. Data collection is done by observing rigid pavement of Palur Flyover project as a case study. The results show the total CO2 emissions during the construction process equals 92.901 tonnes CO2e, consisting of 91.334 tonnes CO2e (98.3%) of off-site activities, and 1.567 tonnes CO2e (1.7%) of on-site activities. The highest emission from off-site activities coming from material production of cement and steel rebars of 88.166 tonnes CO2e (94.9%), and the material transportation process of 3.168 tonnes CO2e (3.4%). This research shows that off-site construction activities, i.e. material production and transportation significantly influence the extent of CO2 emissions in this rigid pavement project. Therefore, it is recommended that strategic efforts for reducing the CO2 emissions of other typical rigid pavement projects should focus on these two.

scholarly journals Measuring Carbon Footprint of Flexible Pavement Construction Project in Indonesia

2018 ◽  
Vol 31 ◽  
pp. 07001 ◽  
Author(s):  
Jati Utomo Dwi Hatmoko ◽  
Arif Hidayat ◽  
Apsari Setiawati ◽  
Stefanus Catur Adi Prasetyo
Keyword(s):  
Carbon Footprint ◽  
Raw Materials ◽  
Ghg Emissions ◽  
Flexible Pavement ◽  
Construction Process ◽  
Carbon Dioxide Equivalents ◽  
Material Transportation ◽  
New Perspective ◽  
Pavement Construction ◽  
Project Data

Road infrastructure in Indonesia is mainly dominated by flexible pavement type. Its construction process, however, has raised concerns in terms of its environment impacts. This study aims to track and measure the carbon footprint of flexible pavement. The objectives are to map the construction process in relation to greenhouse gas (GHG) emissions, to quantify them in terms of carbon dioxide equivalents (CO2e) as generated by the process of production and transportation of raw materials, and the operation of plant off-site and on-site project. Data collection was done by having site observations and interviews with project stakeholders. The results show a total emissions of 70.888 tonnes CO2e, consisting of 34.248 tonnes CO2e (48.31%) off-site activities and 36.640 tonnes CO2e (51.687%) on-site activities. The two highest CO2e emissions were generated by the use of plant for asphalt concrete laying activities accounted 34.827 tonnes CO2e (49.130%), and material transportation accounted 24.921 (35.155%). These findings provide a new perspective of the carbon footprint in flexible pavement and suggest the urgent need for the use of more efficient and environmentally friendly plant in construction process as it shows the most significant contribution on the CO2e. This study provides valuable understanding on the environmental impact of typical flexible pavement projects in Indonesia, and further can be used for developing green road framework.

scholarly journals Evaluation of the energy consumption of container diesel trucks in a container terminal: A case study at Klaipeda port

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110355
Author(s):  
Tomas Eglynas ◽  
Sergej Jakovlev ◽  
Valdas Jankunas ◽  
Rimantas Didziokas ◽  
Jolanta Januteniene ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Dynamic Properties ◽  
Container Terminal ◽  
Superposition Principle ◽  
Critical Parameters ◽  
Container Transportation ◽  
Industrial Emissions ◽  
Transportation Process ◽  
Diesel Trucks

Introduction: In the paper, we examine the energy consumption efficiency of specialized container diesel trucks engaged in container transportation at a seaport terminal. Objectives: Using the container terminal at Klaipėda in Lithuania as the background for the research, we produced an improved energy consumption model for measuring the theoretical energy consumption and regeneration of diesel trucks at the terminal and provide a comparative analysis. Methods: We created a mathematical model which describes the instantaneous energy consumption of the diesel trucks, taking into account their dynamic properties and the overall geometry of their routes—“Ship-Truck-Stack-Ship”—using the superposition principle. We investigated other critical parameters relevant to the model and provide a statistical evaluation of the transportation process using data from a case study of Klaipėda port, where we collected measurements of container transportation parameters using georeferenced movement detection and logs from wireless equipment positioned on the diesel-powered container trucks. Results: The modeling results showed that an instantaneous evaluation of energy consumption can reveal areas in the container transportation process which have the highest energy loss and require the introduction of new management and process control initiatives to address the regulations which are designed to decrease harmful industrial emissions and encourage novel technologies and thereby increase the eco-friendliness of existing systems. Conclusion: Based on the research results, the article can provide a reference for the estimation of diesel truck efficiency in seaport terminal operations.

scholarly journals Analysis of CO2 Emissions from Industrial Parks: A Case Study in Ho Chi Minh City, Vietnam

2021 ◽  
Vol 1092 (1) ◽  
pp. 012084
Author(s):  
T LVan ◽  
V T T Ho ◽  
H D T Thanh ◽  
N T Thong ◽  
Q Huynh ◽  
...  
Keyword(s):  
Co2 Emissions ◽  
Ho Chi Minh City ◽  
Industrial Parks

Short-term response of CO2 emissions to various leaf litters: a case study from freshwater marshes of Northeast China

2016 ◽  
Vol 25 (1) ◽  
pp. 119-128
Author(s):  
Chao Gong ◽  
Changchun Song ◽  
Xinhou Zhang ◽  
Wenwen Tan ◽  
Tianhua Qiao
Keyword(s):  
Co2 Emissions ◽  
Northeast China ◽  
Short Term ◽  
Freshwater Marshes ◽  
Term Response

scholarly journals The potential impacts of a digital preoperative assessment service on appointments, travel-related CO2 emissions, and user experience: a case study (Preprint)

2021 ◽  
Author(s):  
Madison Milne-Ives ◽  
John Leyden ◽  
Inocencio Maramba ◽  
Ray Jones ◽  
Arunangsu Chatterjee ◽  
...  
Keyword(s):  
Co2 Emissions ◽  
Preoperative Assessment ◽  
Service Evaluation ◽  
Primary Objective ◽  
Face To Face ◽  
Patient Feedback ◽  
Potential Benefits ◽  
Set Up ◽  
Evaluation Of Data

BACKGROUND The NHS cannot keep up with the demand for operations and procedures. Preoperative assessments, which can last 30 minutes to 2 hours, could be conducted online to save patient and clinician time, reducing wait times for operations. MyPreOp is a cloud-based platform where patients can set up an account and complete their preoperative questionnaires. This data is reviewed by a nurse, who determines if they need a subsequent face-to-face appointment. OBJECTIVE The primary objective was to describe the potential impact of MyPreOp® (Ultramed Ltd, Penryn, UK) the number of face-to-face appointments. Secondary objectives were to examine the time spent on preoperative assessments completed using MyPreOp in everyday use in NHS Trusts and user ratings of usability and acceptability. METHODS A case study service evaluation of data collected by the MyPreOp system from two NHS Trusts (Guy’s and St Thomas’ and Royal United Hospitals Bath) and the private BMI Bath Clinic during the four-month period of September to December 2020. MyPreOp is delivered by the hospital conducting the preoperative assessment but is typically completed at home at the patients’ convenience. Participants were adults of any age and health status at the participating hospitals who used MyPreOp to complete a preoperative assessment before a scheduled surgery. The primary outcome was the number of face-to-face appointments avoided by patients who used MyPreOp. Secondary outcomes were the length of time spent by nurses completing preoperative assessments, associated travel-related CO2 emissions, and quantitative user feedback. RESULTS Data from 2,500 participants was included. Half of the patients assessed did not need a further face-to-face appointment and required a median of only 5.3 minutes of nurses’ time. The reduction in appointments was associated with a small saving of CO2e emissions (9.05 tonnes). Patient feedback was generally positive: 80% of respondents rated MyPreOp as easy or very easy to use and 85% thought the overall experience was good or very good. CONCLUSIONS This evaluation demonstrated potential benefits of MyPreOp. However, further research using rigorous scientific methodology and a larger sample of NHS Trusts and users is needed to provide strong evidence of MyPreOp’s efficacy, usability, and cost-effectiveness.

scholarly journals Location Routing Problem with Consideration of CO2 Emissions Cost: A Case Study

2020 ◽  
Vol 21 (2) ◽  
pp. 225-234
Author(s):  
Ananda Noor Sholichah ◽  
Y Yuniaristanto ◽  
I Wayan Suletra
Keyword(s):  
Co2 Emissions ◽  
Time Windows ◽  
Optimal Solution ◽  
Mixed Integer ◽  
Distribution Centers ◽  
Location Routing Problem ◽  
Routing Problem ◽  
Location Routing ◽  
Study Results

Location and routing are the main critical problems investigated in a logistic. Location-Routing Problem (LRP) involves determining the location of facilities and vehicle routes to supply customer's demands. Determination of depots as distribution centers is one of the problems in LRP.  In LRP, carbon emissions need to be considered because these problems cause global warming and climate change. In this paper, a new mathematical model for LRP considering CO2 emissions minimization is proposed. This study developed a new  Mixed Integer Linear Programming (MILP)  model for LRP with time windows and considered the environmental impacts.  Finally, a case study was conducted in the province of Central Java, Indonesia. In this case study, there are three depot candidates. The study results indicated that using this method in existing conditions and constraints provides a more optimal solution than the company's actual route. A sensitivity analysis was also carried out in this case study.

scholarly journals “Book Nerds” United: The Reading Lives of Diverse Adolescents at the Public Library

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Sarah A. Evans
Keyword(s):  
Adolescent Literacy ◽  
Literacy Practices ◽  
Comparative Method ◽  
Public Library ◽  
The Public ◽  
Constant Comparative Method ◽  
Diverse Community ◽  
Adolescent Learning ◽  
Project Data

This research asks the question: How does a public library contribute to the literate lives of a diverse community of adolescents? To explore this question, this article presents portraits of three young women, for whom a public library provided transformative opportunities. These portraits come from a larger ethnographic case study that examined a public library’s role in sparking and sustaining adolescent learning. Over 18 months, the author observed library activities involving youth, interviewed library staff and adolescent patrons, and led teen volunteers in a participatory research project. Data were analyzed in a constant comparative method within a sociocultural-historical framework. Through attention to the girls’ activities within the public library, two contributing elements— 1) a democratic space created by library practices, and 2), the diversity in discourse facilitated by the teen librarian—expanded the participants’ literacy practices and perspectives on reading. This article informs our understanding of diversity in adolescent literacy and highlights the practices that libraries and communities can use to foster the next generation of readers.

scholarly journals Evaluation of the Structural Stability of an Octagonal Dome with Meridional Cracks. Case Study: Temple of Santa Lucia, Ambalema, Colombia

2017 ◽  
Vol 2 (2) ◽  
pp. 25
Author(s):  
Jorge Olmedo Montoya ◽  
Olimpia Niglio ◽  
Karol Brigith Romero
Keyword(s):  
Structural Stability ◽  
Dynamic Loads ◽  
Seismic Events ◽  
Seismic Loads ◽  
Construction Process ◽  
Analysis Software ◽  
Historical Structures ◽  
The Temple ◽  
Typical Process

This work performed a comparative analysis between the construction process carried out when building the dome at the Temple of Santa Lucía, in Ambalema-Colombia and the typical process of an octagonal dome. Additionally, the structural stability is assessed of the dome of the case study against service and dynamic loads. To compare with the case study, known domes were taken as examples from structures in Italy and Spain. The analysis includes a study on the dome’s geometry and the constructive errors found. Methodology: The dome’s stability was evaluated through structural analysis software for which the dome was simplified into a system of four articulated arches. Conclusions: As a result, it was found that the dome of the temple of Santa Lucía does not have a system to counteract lateral thrusts (a drum or its similar), which permitted the appearance and widening of meridional cracks. These cracks propagate from the base to the crown, but do not compromise the structure’s stability for service loads. The analysis for seismic loads indicates that the dome is at risk of collapse upon seismic events, even of moderate magnitudes. Originality: The study is aimed at architects and engineers interested in the theme of restoration of historical structures.

Sign in / Sign up

Export Citation Format

Share Document