COLLECTIONS

JOURNALS

Documents published in Scipedia

• EFFECTS ON MODIFIED PROPERTIES OF EXPANSIVE CLAY SOIL USING WASTE HOLLOW CONCRETE BLOCK (HCB) AND CEMENT PLASTER WASTE MATERIALS FOR SUBGRADE CONSTRUCTION

  G. Chala, P. Quezon, E. Mekonnen, W. Ararsa, E. Quezon

  International Journal of Research - Granthaalayah (2020). Galeta Chala, Professor Emer Tucay Quezon, Eyob Mekonnen, and Woyesa Ararsa. (2020). “EFFECTS ON MODIFIED PROPERTIES OF EXPANSIVE CLAY SOIL USING WASTE HOLLOW CONCRETE BLOCK (HCB) AND CEMENT PLASTER WASTE MATERIALS FOR SUBGRADE CONSTRUCTION.” International Journal of Research - Granthaalayah, 8(3), 342-347. https://doi.org/10.5281/zenodo.3742944.

  
  

  Abstract

  Expansive soils characterized by changing its volume and strength due to seasonal variations. Due to this volume changes, expansive clay soil caused many problems in road construction and is relatively common in Ethiopia. As a result, such types of soil are not adequately for road construction, which requires proper attention. The focus of this study was to improve the engineering properties of the expansive clay soil with the addition of waste materials to use as a subgrade construction material. Soil samples were taken from three locations within the study area and performed laboratory tests for the moisture content, specific gravity, free swelling, Atterberg limit, and compaction test on its natural state. The expansiveness of the soil from the three locations were determined. The highest value of expansiveness from these samples considered for the experiment by the addition of waste materials concentration with 5%, 10% 20%, and 30% by weight. Test results indicated that the moisture content, free swelling, specific gravity Atterberg limit decreased, while the maximum dry density increased as the concentration of waste material increase. Hence, the minimum amount of waste materials comprised of 10% that will improve the strength of expansive clay soil for use in road subgrade construction.

  Abstract
  Expansive soils characterized by changing its volume and strength due to seasonal variations. Due to this volume changes, expansive clay soil caused many problems in road [...]

  • 2
  •  read

• . Effects of Poor Workmanship on Building Construction and Its Implication to Project Management Practice: A Case Study in Addis Ababa City

  E. Quezon

  Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University (2020). Alsen Fromsa, Woyesa Ararsa, Emer T. Quezon. Effects of Poor Workmanship on Building Construction and Its Implication to Project Management Practice: A Case Study in Addis Ababa City. Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University. 2020; 14(9): 1174-1188. Doi: 10.37896/jxu14.9/128

  
  

  Abstract

  sup>— The construction of building structure involves very complicated undertakings. It requires a trained workforce at the design stage, approval process, supervision, and construction stages. Inferior quality of workmanship is one of the significant issues facing the workforce to perceive and apply the proper construction methods and techniques following the quality control assurance for building projects. This study considered some of the construction stakeholders participated in the implementation of projects in Addis Ababa City. It focused on assessing and investigating poor workmanship on the quality of projects that included concreting works to accessible ongoing construction sites across the study area. It involved determining the cause of low-level workmanship and identifying factors that would significantly minimize the problems and increase client satisfaction. The study comprised of 20 construction sites, of which 55 questionnaires were collected. The data collected are related to the challenges facing the construction industry and concrete quality as well. The causes and strategies applied to improve construction quality were analyzed using the study's variable. Results indicated that inadequate construction management represented a low level of workmanship and a lack of training rated first with RII of 0.9556. At the same time, the Workers' motivation was placed second with RII 0.775. Hence, it recommends close observation of construction management factors like supervision, training, motivation, and good communication on-site to minimize the cost and effects associated with poor workmanship when implementing building projects.

  Abstract
  sup>— The construction of building structure involves very complicated undertakings. It requires a trained workforce at the design stage, approval process, supervision, [...]

  • 16
  •  read

• Effect of Partial Replacement of Crushed Stone Dust Filler with Waste Glass Powder in Hot Mix Asphalt Concrete Production

  D. Kifile, E. Quezon, A. Tesfaye

  Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University (2020). Destaw Kifile, Emer Tucay Quezon, Abel Tesfaye. Effect of Partial Replacement of Crushed Stone Dust Filler with Waste Glass Powder in Hot Mix Asphalt Concrete Production. Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University. 2020; 14(9): 578- 587. Doi: 10.37896/jxu14.9/060

  
  

  Abstract

  The use of waste recycled materials in road construction nowadays is considered a positive means of providing improved pavement performance. This research focused on evaluating the effect of waste glass powder as a partial replacement of crushed stone dust filler in hot mix asphalt. Three hot mix asphalt samples were produced using crushed stone dust of 5%, 6.5%, and 8% as mineral filler with five different bitumen content of 4%, 4.5%, 5%, 5.5%, and 6%, respectively. From the preliminary series tests of asphalt contents, a 6.5% crushed stone dust filler selected, providing the highest waste glass powder stability. The content of crushed stone dust filler was replaced with a rate of 0%, 25%, 50%, 75%, and 100% to test Marshal stability to obtain the Optimum bitumen content and Optimum filler content. Results indicated at 75% replacement of crushed stone dust with waste glass powder at 5.10% bitumen content, 12.0kN Marshall stability value, 2.84mm Flow value, 4.0% Air voids, 72.3% VFB, and 2.360g/cm3 Bulk density. Hence, the mixture of 75% waste glass powder by weight of crushed stone dust filler meets the minimum requirements of the Ethiopian Road Authority and Asphalt Institute Specifications.

  Abstract
  The use of waste recycled materials in road construction nowadays is considered a positive means of providing improved pavement performance. This research focused on evaluating [...]

  • 8
  •  read

• Correlation Analysis of Factors Affecting Shoring Construction Techniques in Central Business District of Addis Ababa, Ethiopia

  H. Kassu, E. Mekonnen, D. Gudissa, E. Quezon

  Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University (2020). Hailemariam Kassu, Eyob Mekonnen, Dumesa Gudissa and Emer T. Quezon. Correlation Analysis of Factors Affecting Shoring Construction Techniques in Central Business District of Addis Ababa, Ethiopia. Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University. 2020; 14(10): 692-706. https://doi.org/10.37896/jxu14.10/074

  
  

  Abstract

  Recent urbanization of central parts of Addis Ababa has necessitated the use of deep excavations for the foundation of highrise buildings and related infrastructure projects. The conditions of the subsoil, the safety of neighboring structures, groundwater conditions, experience by contractors, working space, the effect of vibration, and noise must be considered for the choice of deep excavation support system. Besides, economic factors, local availability of equipment, and technical staff are also governing factors for choosing an appropriate shoring technique. The study focused on the major construction methods and techniques of shoring works in Addis Ababa, Ethiopia. Only four projects utilized shoring construction techniques from the total number of high-rise buildings available in the City. The target population included a minimum of twenty respondents from the four construction sites constructed around Beherawi, Lideta sub-city in Addis Ababa. Two of the projects were supervised by Specialists from Varnero Foundation and Meseret Foundation PLC. Primary and secondary data are gathered to support the objective of the study. All the frequency distribution, Reliability, and Pearson correlation were analyzed using SPSS. All groups of factors that affect shoring construction were ranked using the Relative Importance Index (RII). Results indicated that geotechnical investigation, building type, and excavation depth were the major factors with an RII value of 0.89 and 0.86, respectively. Besides, the analyses showed that were strong correlations between the different factors within each group of factors in undertaking the shoring construction. Hence, it is suggested to take a deep and detailed sub-soil investigation to determine the suitability of shoring materials, appropriate construction methods, and techniques.

  Abstract
  Recent urbanization of central parts of Addis Ababa has necessitated the use of deep excavations for the foundation of highrise buildings and related infrastructure projects. [...]

  • 2
  •  read

• Expert Choice-Based Approach on Analytical Hierarchy Process for Pavement Maintenance Priority Rating Using Super Decision Software in Addis Ababa City, Ethiopia

  E. Quezon

  American Journal of Civil Engineering and Architecture (2020). Hanna Mengistu; Emer Tucay Quezon; Markos Tsegaye and Tegegn Markos. Expert Choice-Based Approach on Analytical Hierarchy Process for Pavement Maintenance Priority Rating Using Super Decision Software in Addis Ababa City, Ethiopia. American Journal of Civil Engineering and Architecture. 2020; 8(3): 105-118. Doi:10.12691/ajcea-8-3-4

  
  

  Abstract

  Untimely maintenance activities resulting from budget fluctuations and improper prioritization can lead to further pavement deterioration. Selecting the most cost-effective maintenance activities to control and minimize road users' risk under current budget constraints is necessary. The study tried to fill the gap that decision-makers in Addis Ababa City Road Authority often performed pavement repair and maintenance without considering a systematic procedure. Ten road sections selected that are planned for pavement maintenance in the study area. The most dominant distresses ranked in Decision Analysis Module in Excel, including road class, weights for each criterion, and sub-criteria obtained using the Analytical Hierarchy Process approach and calculated in Super Decision Software for maintenance prioritization. Results indicated that the developed analytical hierarchy process model works sufficiently and yields adequate output for providing accurate decisions. Hence, considering the multi-criteria to prioritize the pavement sections for maintenance, this model can give affirmative action for the decision-maker.

  Abstract
  Untimely maintenance activities resulting from budget fluctuations and improper prioritization can lead to further pavement deterioration. Selecting the most cost-effective [...]

  • 2
  •  read

• Effect of Selected Conventional and Non-conventional Mineral Fillers with ‘Enset’ Fibers on Compaction Characteristics of Stone Mastic Asphalt Pavement (SMAP)

  S. Belay, E. Quezon, A. Geremew

  Jordan Journal of Civil Engineering (2021). Sinishat Belay, Emer Tucay Quezon and Anteneh Geremew. Effect of Selected Conventional and Non-Conventional Mineral Fillers with Enset Fibers on Compaction Characteristics of Stone Mastic Asphalt Pavement (SMAP). Jordan Journal of Civil Engineering. 2021; 15(1): 30-40

  
  

  Abstract

  The content and type of ingredient materials are used to prepare the asphalt mix to affect the pavement surface's quality. This study aimed to investigate the compaction characteristics of Stone Mastic Asphalt Pavement (SMAP) mix using two different types of mineral fillers; namely, crushed stone and Ambo sandstone dust with local material enset fiber. Results indicated that the filler type and the content with or without fiber have a great effect on compaction characteristics of Stone Mastic Asphalt Pavement. The test results also showed that the addition of enset fiber in asphalt mix increases density, compaction energy, and strength of asphalt mix and reduces Marshall flow of the mixes. Besides, crushed stone dust and Ambo sandstone dust with enset fiber affect the Marshall property and compaction characteristics of the stone mastic asphalt mix differentially. The Ambo sandstone dust filler has a low density and has high binder absorption capacity compared with crushed stone dust filler in SMA mixes. In this study, the optimum binder content for the mixture by using Ambo sandstone dust (8%, 6.41%), (8.5%, 6.48%) & (10%, 6.43%) as well as the mixture using crushed stone dust filler at (8%, 5.84%), (8.5%,6.32%) & (10%,5.96%) was determined. The optimum fiber content obtained at 0.3% suggests that using enset fiber in stone mastic asphalt mixture improves the strength of asphalt pavements to resist external loads. The enset fiber at 0.3% better modifies stone mastic asphalt pavement properties. Finally, it is postulated that the performance of pavement is affected by filler type and content. Simultaneously, the Marshall property has a linear relationship with compaction characteristics. It showed the possibility of constructing stone mastic asphalt pavement in Ethiopia by using locally available materials.

  Abstract
  The content and type of ingredient materials are used to prepare the asphalt mix to affect the pavement surface's quality. This study aimed to investigate the compaction [...]

  • 3
  •  read

• Experimental Study on Application of Marble Waste as Conventional Aggregate for Base Course Materials

  L. Gonfa, E. Geremew, E. Quezon

  Journal of Civil Engineering, Science and Technology (2020). Lami Gonfa, Emer Tucay Quezon and Anteneh Geremew. Experimental Study on Application of Marble Waste as Conventional Aggregate for Base Course Materials. Journal of Civil Engineering, Science and Technology. 2020; 11(2): 144- 163. Doi: 10.33736/jcest.2337.2020

  
  

  Abstract

  Recently, highway and construction industries utilize a substantial quantity of conventional aggregates. The increasing demands for conventional aggregate cause an increase in the cost of construction, reduction of natural resources, and continuing deterioration of the earth's surface. On the other hand, the waste generated from the marble industries during the process of cutting and polishing was increasing day by day all over the world. In Ethiopia, the use of Marble Waste Aggregate materials in road construction as a base course material was not well-known, and it was simply wasted at every place where the marble production was continuing. Therefore, this paper focused on evaluating the possibility of using marble waste aggregate as conventional aggregate in the base course layer of flexible pavements by experimental method. To achieve the objectives of the research, mechanical stabilization and laboratory tests have been carried out at different percentage replacement of Conventional Aggregate by (0%, 20%, 40%, 50%, 60%, 80%, and 100%) of Marble Waste Aggregate weights. Marble wastes materials are collected from Burayyu city, Alisha marble processing industry. The laboratory test results for MWA indicated SG, ACV, AIV, LAA, Flakiness Index , Elongation Index, Plastic Index, Water Absorption, and CBR of 2.74%, 23.63%, 26.21%, 27.03%, 26.48%, 13.29%, Non Plastic, 0.50% and 73.3%, respectively. These test results fulfilled the ERA standard specification for some tests, and they showed marginal quality values to the standard specification for GB2 and GB3 base course materials. CBR and gradation test results shown failure to meet the standard specification. Thus, mechanical stabilization was done to improve the mechanical and physical properties of the Marble Waste Aggregate. Blending of 80%MWA with 20% CA results in SG, ACV, AIV, LAA, Flakiness Index, Elongation Index, Plastic Index, Water Absorption, and CBR of 2.83%, 18.2%, 21.52%, 22.58%, 23.79%, 16.29%, Non Plastic, 0.80%,and 82.5% respectively. At this proportion, the gradation also observed to fit with the required ERA standard specification of GB2 and GB3 materials. Therefore, the use of marble waste aggregate up to 80% by weight is recommended for the road base course layer, when it is found near to the construction site and in places where the materials are abundantly available.

  Abstract
  Recently, highway and construction industries utilize a substantial quantity of conventional aggregates. The increasing demands for conventional aggregate cause an increase [...]

  • 5
  •  read

• Analysis of influential factors affecting workers’ productivity on highway construction projects during Covid-19 pandemic in Cagayan Valley Region, Philippines

  E. Quezon

  Analysis of influential factors affecting workers’ productivity on highway construction projects during Covid-19 pandemic in Cagayan Valley Region, Philippines (2021). [1] Koźlak A. Role of the Transport System in Stimulating the Economic and Social Development. Transport Economics and Logistics. 2017; 72: 19-33; Doi:10.5604/01.3001.0010.6873. [2] McTague B, Jergeas G. Productivity Improvements on Alberta Major Construction Projects, Construction Productivity Improvement Report/Project Evaluation Tool. Alberta Economic Development, Alberta, Canada. 2002. [3] Alaghbari W, Al-Sakkaf AA, Sultan B. Factors Affecting Construction Labor Productivity in Yemen, Intl. Journal of Construction Management. 2017; 1-13 Doi.10.1080/15623599.2017.1382091 [4] Natawidjana R, Nurasiyah R. Study of labor cost escalation in delay projects; presented at the Intl. Conference on Innovation in Research. 2020. Doi:10.1088/1742-6596/1469/1/012034. [5] Naoum SG. Factors influencing labor productivity on construction sites: A state-of-the-art literature review and a survey. International Journal of Productivity and Performance Management. 2016; 65(3):401-421. DOI: 10.1108/IJPPM-03-2015-0045. [6] Nyando CK, Strasheim JA. Assessing Labor-based Construction Works Management Processes. Proceedings of the Institution of Civil Engineers - Management, Procurement and Law. 2012; 164(4): 239-251. [7] Hicksona BG, Ellis A. Factors affecting Construction Labor Productivity in Trinidad and Tobago. The Journal of the Association of Professional Engineers of Trinidad and Tobago. 2014; 42: 4-11. [8] Irfan M, Zahoor H, Abbas M, Ali Y. Determinants of Labor Productivity for Building Projects in Pakistan. Journal of Construction Engineering, Management & Innovation. 2020; 3(2): 85-100. Doi: 10.31462/jcemi.2020.02085100. [9] Low SP, Chan YM. Managing Productivity in Construction. JIT Operations and Measurements, Brookfield (VT). 1997. [10] Thomas HR, Daily J. Crew Performance Measurement via Activity Sampling. Journal of Construction Engineering and Management. 1983; 109(3): 309-320. [11] Banik GC. Construction productivity improvement. In Proceedings of the 35th ASC Annual Conference, San Luis Obispo, CA. 1999: 165-178. [12] Dabirian S, Khanzadi M, Taheriattar R. Qualitative Modeling of Sustainability Performance in Construction Projects Considering Productivity Approach. International Journal of Civil Engineering. 2017; 15(8): 1143-1158. [13] Al-Shahri M, Assaf S, Atiyah S, AbdulAziz A. The management of construction company overhead costs.” International Journal of Project Management. 2001; 19: 295-303. [14] Cronbach, L. Coefficient alpha and the internal structure of test. Psychometrica. 1951; 16: 297-334. [15] Mekdim M. A Study on Construction Equipment Planning and Management Problems in Road Construction Project. A Case Study: The Addis Ababa City Roads Authority. 2017. [Unpublished]. [16] George D. SPSS for Windows Step by Step: A simple guide and reference. 11.0 update (4th ed.). Allyn & Bacon. 2003. [17] Gliem JA. Calculating, Interpreting, and Reporting Cronbach's Alpha Reliability Coefficient for Likert-type Scales. 2003. [18] Hedaoo H. Delay Analysis by Using Relative Importance Index Method in Infrastructure Projects. Int. J. Civil Engg. Conc.Structs. 2016. [19] Dong Z. The Relationship Between Information Technology and Construction Productivity. University of Kentucky Doctoral Dissertations. 2010; 44. Http://Uknowledge.Uky.Edu/Gradschool_Diss/44 [20] Hafez SM, Aziz RF, Morgan ES, Abdullah MM, Ahmed EK. Critical Factors Affecting Construction Labor Productivity in Egypt. American Journal of Civil Engineering. 2014; 2(2): 35-40. Doi: 10.11648/j.ajce.20140202.14. [21] Olomolaiye P, Kaming P, Holt G, Harris F. Factors influencing craftsmen's productivity in Indonesia. International Journal of Project Management. 1996: 21–30.

  
  

  Abstract

  In highway construction projects, labor-oriented work is an integral part of the management process, requiring analysis of factors affecting labor productivity during the Covid-19 pandemic. This research identified 53 influential factors affecting construction labor productivity at selected cities and towns in Cagayan Valley Region, Philippines. Due to the pandemic, the construction industries incurred substantial profit losses. More so, the construction workers are too much affected because of the Enhance Community Quarantine (ECQ) imposed by the local government. Results indicated there was laxity on the Covid-19 protocols. No health worker in the project site ranked the highest in the health & safety factor group with an RII of 0.97 and ranked 1st among 53 factors on the different groups. Besides, no safety engineer was assigned to the projects and ranked 2nd with an RII of 0.93. Among the 7 groups of factors, the health and safety group ranked 1st with 0.81, followed by the schedule compression group with an RII of 0.78. Hence, these two groups of factors have a strong relationship, as evidenced by the number of workers reduced. It was learned that the contractors’ strategy was to increase the number of working days to cope with their schedules. Hypothesis testing supported that there are various significant factors influencing labor productivity loss during the Covid-19 pandemic, as suggested by more than 50% of the respondents.

  Abstract
  In highway construction projects, labor-oriented work is an integral part of the management process, requiring analysis of factors affecting labor productivity during the [...]

  • 76
  •  read

• Investigation on the performance of ‘Fino’ materials to stabilize expansive soil: A case study in Yeka Sub-City, Addis Ababa, Ethiopia

  T. Mindaye, E. Quezon

  Investigation on the performance of ‘Fino’ materials to stabilize expansive soil: A case study in Yeka Sub City, Addis Ababa, Ethiopia (2021). [1] Atahu MK, Saathoff F, Gebissa A. Engineering Properties of Black Cotton Soil Stabilized with Coffee Husk Ash and Lime. Global Journal of Engineering Science and Research Management. 2020; 7(1): 20-38; Doi: 10.5281/Zenodo.3625617. [2] Mesfun RT, Quezon ET, Geremew A. Experimental Study of Stabilized Expansive Soil using Pumice Mixed with Lime for Subgrade Road Construction. International Journal of Research – Granthaalayah. 2019; 7(7), 118-124; Doi: 10.5281/zenodo.3355594. [3] Mamuye Y, Quezon ET, Geremew A. Combined Effects of Molasses-Lime Treatment on Poor Quality Natural Gravel Materials Used for Sub-Base and Base Course Construction. GSJ. 2018; 6(7): 621-633. [4] Rekha LA, Keerthana B, Ameerlal H. Performance of fly ash stabilized clay reinforced with human hair fiber. Geomechanics and Engineering. 2016; 10(5): 677-687. [5] Agarwal A, Muley P, Jain PK. An experimental and analytical study on california bearing ratio of lime stabilized black cotton soil. Electronic Journal of Geotechnical Engineering. 2016; 21(20): 6583-6599. [6] Chala G, Quezon ET, Mekonnen E, Ararsa W. Effects on Modified Properties of Expansive Clay Soil using Waste Hollow Concrete Block (HCB) and Cement Plaster Waste Materials for Subgrade Construction. International Journal of Research – Granthaalayah. 2020; 8(3): 342-347. Doi: 10.5281/zenodo.3742944. [7] Teferra A, Leikun M. Soil Mechanics. Addis Ababa: Addis Ababa University; 1999. [8] Nitshit T. Stabilization of expansive soils using Rice Husk Ash (RHA), MSc. Thesis, A.A.U; 2016. [9] Meron W. Bagasse ash as a Sub-grade soil Stabilizing Material, MSc. Thesis Addis Ababa University; 2014. [10] ASTM. Annual book of ASTM standards. American Society for Testing and Materials, Philadelphia; 1989. [11] Addis Ababa City Roads Authority (AACRA). Soil and Material Manual, Section-4 Soil Survey and Treatment; 2004. [12] African Development Bank; 2014. [13] Ethiopian Roads Authority (ERA). Design Manual; 2013. [14] AASHTO. Guide for Design of Pavement Structures, American Association of State Highways and Transportation Officials, USA; 1993.

  
  

  Abstract

  Expansive soil swells when it is wet, and it will shrink when it dries. Due to this behavior of the soil, the strength and other properties of soil are inferior. To improve its properties, it is necessary to stabilize the soil with different stabilizers. Soil stabilization is a process to treat the soil to maintain, alter, or improve expansive soil performance. In this study, the potential of 'Fino' as stabilizing additive to expansive soil was investigated for the improving engineering properties of expansive soil to be used as subgrade material. The evaluation involved the determination of the Free Swell test, CBR test, Atterberg's limits, and the Proctor test of expansive soil in its natural state as well as when mixed with varying proportions of 'Fino.' The practices were performed on six proportions 5%, 10%, 15%, 20%, 25% and 30 % with expansive soil. The research result indicated a considerable reduction in Swelling, and the Maximum dry Density of soil was improved. Optimum moisture content decreased in increasing 'Fino.' At 30% of 'Fino,' the CBR values of expansive soil increased from 1.06% to 5.94%, Liquid Limit decreased from 95.2% to 29.4%, plasticity index decreased from 57.24% to 17.82% and the degree of expansion of the natural subgrade soil has reduced from 'very high to medium.' Hence, it is concluded that the 'Fino' at 30% has shown significant improvement in the expansive soil's engineering properties meeting the ERA and AASHTO Standard specifications requirements for road subgrade material.

  Abstract
  Expansive soil swells when it is wet, and it will shrink when it dries. Due to this behavior of the soil, the strength and other properties of soil are inferior. To improve [...]

  • 19
  •  read

• Application of HDM-4 Model in the Structural, Functional, and Economic Variations using Road Maintenance Alternatives: A Case Study at Selected Road Sections in Addis Ababa City

  M. Demie#, E. Quezon, A. Feyissa#

  Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University (2020). [1] Project Administration Service, “Operation and Management Improvement Study,” City of Addis Ababa, pp. 1-3, September 2019. [2] Shah Yogesh U, Jain S. S., and Tiwari Devesh. “Adaptation of HDM-4 Tool for Strategic Analysis of Urban Roads Network,” 11th Transportation Planning and Implementation Methodologies for Developing Countries, TPMDC 2014, 10-12 December 2014, Mumbai, India. [3] Henry G. R. Kerali, Derek McMullen & J.B. Odoki. “Applications Guide of HDM-4,” World Road Association, December 2006. [4] Hanna Mengistu, Emer Tucay Quezon, Markos Tsegaye, and Tegegn Markos, “Expert Choice-Based Approach on Analytical Hierarchy Process for Pavement Maintenance Priority Rating Using Super Decision Software in Addis Ababa City, Ethiopia.” American Journal of Civil Engineering and Architecture, vol. 8, no. 3 (2020): 105-118. doi: 10.12691/ajcea-8-3-4. [5] Marco Montoya-Alcaraz, Alejandro Mungaray-Moctezuma, and Leonel García. “Sustainable Road Maintenance Planning in Developing Countries Based on Pavement Management Systems: Case Study in Baja California, México,” Sustainability 2020, 12, 36; doi:10.3390/su12010036. [6] Black, K., “Business Statistics: Contemporary Decision Making,” 6th edition, John Wiley & Sons, 2010. [7] George Miaoulis, R. Dean Michener, “An introduction to Sampling,” Kendall/haunt publishing company, ISBN-0840316038, 9780840316035, 1976 [8] Yamane, Taro., “Statistics: An Introductory Analysis,” 2nd Edition, New York: Harper and Row, 1967. [9] Washington State Transportation Department, "Maintenance Manual," Olympia, June 2017. [10] Henry G. R. Kerali, “Overview of HDM-4,” Volume 1, World Bank, pp-54-55, July 2000. [11] Part B Concepts of Project Analysis, Applications Guide B1-1, Version 1.0. [Accessed 12 September 2020] http://www.rhd.gov.bd/Documents/ExternalPublications/HDM/t3/HDM4%20Version%201.0/DOCUMENTATION/RUS/V2/Part_B.pdf.

  
  

  Abstract

  The roadway is one of the most crucial transportation modes to cater to inland movement within a country. The agency mandate is to design, construct, and maintain the road to sustain the traffic up to its design life without further strengthening. However, some factors are affecting the performance of the pavement. Most pavements start to show some traces of deterioration after construction and opening to traffic, but once neglected, the distress portions would be aggravated with corresponding increasing maintenance cost. Thus, the road's maintenance has to be carried out at the place, right schedule, right quality, and at the least cost. Since there are different maintenance alternatives, the best strategy has to be chosen following the road's condition and the severity of the damage. To select the best maintenance alternative, calculations on the pavement layer's property are performed. The Highway Development and Management (HDM-4) tool can do such measures to help decide which option is the best by evaluating the economic and structural conditions. This paper contains two significant areas that are studied. First, it was assessed the procedures followed by the city's road authority to develop the appropriate road maintenance strategies. Questionnaire surveys and interviews are used to collect information from the city's road maintenance departments. Second, the project analysis was performed for structural and economic comparison of different maintenance alternatives using HDM-4. In the analyses, three selected road segments are considered and collected important input data like road condition data, road network data, vehicle fleet data, estimated AADT, and International Roughness Index (IRI). There were five maintenance alternatives that have been defined, and proposed maintenance alternatives are compared. The selection is based on the deteriorated pavement, which showed the average roughness for every section of the road network, considering an analysis period of 20 years and cost stream ranking for their Net Present Value and IRR. Results indicated that using a mill and replace, and routine maintenance schedule for the selected road networks is economically viable and structurally significant. Hence, the city's road authority is recommended to apply the different maintenance strategies, providing an economical and better performance for the city's road network.

  Abstract
  The roadway is one of the most crucial transportation modes to cater to inland movement within a country. The agency mandate is to design, construct, and maintain the road [...]

  • 0
  •  read