Issue 1-Vol 1
2017
Enhanced Rock Oyster Mound as Breakwater System
12 Pages Posted: 17 Jan 2018
Ronald Orale
Samar State University
Jesus Racuyal
Samar State University
Date Written: December 28, 2017
Abstract
The existing rock mound technology specifically those erected for rock oysters (saccustrea cucullata) posed several problems such as growth efficiency, water circulation, sediment accumulation, and durability against waves. This paper investigated on a laboratory scale using a physical model of a coastal zone. About 141 test runs were made to measure and observe the resilience, wave-breaking ability, sediment transport, and water circulation of five different rock mound shapes and set-ups/arrangements. Data showed that the droplet and the diamond shape arranged in a staggered formation was the optimum design. The droplet shape provided a more cost-effective design as a rock oyster mound and as a breakwater set-up. Validation of the design in an actual environment is recommended.
Keywords: rock mounds, coastal protection, sisi, sacostrea cucullata, mariculture
Suggested Citation:
Orale, Ronald and Racuyal, Jesus, Enhanced Rock Oyster Mounds As Breakwater System (December 28, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=3087108 or http://dx.doi.org/10.2139/ssrn.3087108
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3087108 or http://dx.doi.org/10.2139/ssrn.3087108
An Application of TBEC-2018 in the Prediction of Retaining Wall Dimensions with Simple Regression Analysis
Global Virtual Conference in Civil Engineering (GVCCE) 2020
11 Pages Posted: 24 Nov 2020
Z. Akbay Arama
Istanbul University-Cerrahpaşa
Hazal Berrak Gençdal
Istanbul Kultur University
Date Written: November 12, 2020
Abstract
Retaining walls are common engineering structures that are built to resist the lateral earth pressures generally caused by the excavations. It has always been a suspicious subject for engineers to design the retaining walls under dynamic loads. In this context, In Turkey, the Turkish Building Earthquake Code 2018 (TBEC-2018) is developed to perform more sensitive analyses to increase the welfare and security of society, depending on structural safety. TBEC-2018 has also mentioned the design of the reinforced concrete retaining walls (RCRW) under seismic loads at the 16th section. The design of the RCRW walls is performed in this study, according to TBEC. It is considering the change of the excavation depth, the shear strength angle of the soil and the unit weight of the soil, the surcharge load. The change of the dimensions has been investigated and conducted simple regression analyses to obtain design expressions based on the change of mentioned variants.
Keywords: Turkish Earthquake Building Code, Reinforced Concrete Retaining Walls, Earthquake Resistant Design
Suggested Citation:
Akbay Arama, Zulal and Dalyan, İlknur and Akın, M. Selahaddin and Gençdal, Hazal Berrak, An Application of TBEC-2018 in the Prediction of Retaining Wall Dimensions with Simple Regression Analysis (November 12, 2020). Global Journal in Civil Engineering, Vol. 2, No. 2, 2020, Global Virtual Conference in Civil Engineering (GVCCE) 2020, Available at SSRN: https://ssrn.com/abstract=3734163
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3734163
Axial Tensile Strength Analysis of Naturally Treated Bamboo As Possible Replacement of Steel Reinforcement in the Concrete Beam
9 Pages Posted: 16 Jan 2018
Teodoro Jr. Amatosa
Northwest Samar State University - College of Engineering and Technology
Michael Loretero
Universidad de San Carlo de Guatemala - School of Engineering
Date Written: December 6, 2017
Abstract
This paper was undertaken to evaluate Giant bamboo (Dendrocalamus Asper) which is an abundant natural resource that can be considered as an alternative for construction materials for reinforcement to compensate for the low tensile property of the concrete. Considering the cost, even though steel reinforcement is a very suitable material for complementing concrete’s low tensile strength, bamboo products enter the diverse worldwide markets, and the value of these natural resources stands to grow. Bamboo and steel are structural materials with different engineering qualities used for the construction of buildings and other engineering construction-related purposes. To overcome these problems, the full socio-economic potential of bamboo is yet to be realized as an alternative materials to substitute the reinforcing bar in concrete for less important structures by investigating the tensile properties of this type of natural reinforcement. To evaluate these properties, 5 each bamboo were tested in natural preservation submerged in fresh water and salt water for 7 days and 28 days cycles for the internode and node section in which a tension test was conducted on the bamboo specimen following the ASTM standards. From this test, the average ultimate tensile strength is approximately 211.18 MPa in the specimens without nodes for 7 days soaked in salt water and 138.97 MPa in the specimens with nodes soaked in fresh water for 28 days. Finally, 7 cycles of wetting and drying in a solution of salt-water treated did not increase the bamboo tensile strength neither the Young’s Modulus, therefore, the study concludes that due to the minimal breaking force (FB) of bamboo, it cannot be employed as a main structural member in buildings and other heavy engineering works but can be used for partition walls, ceilings, roofs and other areas of lightweight engineering construction that is not heavy loadbearing capacity.
Keywords: Construction Materials, Dendrocalamus Asper Bamboo, Mechanical Properties, Natural Preservation, Ultimate Tensile Strength
Suggested Citation:
Amatosa, Teodoro Jr. and Loretero, Michael, Axial Tensile Strength Analysis of Naturally Treated Bamboo As Possible Replacement of Steel Reinforcement in the Concrete Beam (December 6, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=3083832 or http://dx.doi.org/10.2139/ssrn.3083832
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3083832 or http://dx.doi.org/10.2139/ssrn.3083832
Flood for Hazard Assessment of Gandara River: Input to Flood Control Program
11 Pages Posted: 13 Dec 2017
Lady Ann Fabillar
Samar State University
Felisa Gomba
Samar State University
Date Written: May 25, 2017
Abstract
The flooding problem in San Jorge Samar may be solved through an effective implementation of flood control program. As such, the primary purpose of this study is to estimate the potential parameters of flood occurrence of the Gandara River along San Jorge channel through its topography, hydrological characteristics and siltation manifestation. As part of an assessment process, this study also defines the existing practice of flood control initiatives, evaluate and eventually propose a flood control program. As guided by the DPWH Flood Control Planning Manual, assessment and computation of the needed parameters in planning and design of flood control program was processed through HEC-HMS (Hydrological Engineering Center–Hydrologic Modeling System) software. Findings suggest San Jorge urban areas, as well as portions of its adjacent barangays as depicted in topography, is surrounded by significant upland and rolling area. Gandara River Basin at San Jorge channel is considered a flood prone. As to some hydrological characteristics contributory to a flooding event, at extreme precipitation, the resulting floodplain adjacent to the river channel covers a total 4,315,568 square meters, inundating big portion of mostly a commercial, educational and agricultural area. Peak discharge is 1474 cubic meters per second, that produces a flood depth that reached up to about 7 meters which are significantly high. Sedimentation or siltation is also contributory to flooding events in the area, As there is no concrete strategy of flood control yet, flooding event remains a devastating phenomenon annually. Hence, it is imperative to establish a mitigating if not a control measures for Gandara River at San Jorge, Samar, Philippines. Presented in the last part of this study is a proposal for Flood Control Program for Gandara River as a recommendation to the local government of San Jorge, Samar, Philippines.
Keywords: Hazard, Hydrologic Modelling, Flood Control Program, Topography, River, Economic Development, Innovation, Technological Change and Growth
Suggested Citation:
Fabillar, Lady Ann and Gomba, Felisa, Flood for Hazard Assessment of Gandara River: Input to Flood Control Program (May 25, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=3085386 or http://dx.doi.org/10.2139/ssrn.3085386
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3085386 or http://dx.doi.org/10.2139/ssrn.3085386
Strengthening Rabaul Volcanic Ash (RVA) Cement Compressisbility with the Addition of Lime
6 Pages Posted: 11 Dec 2017
Mirzi Betasolo
Papua New Guinea university of Technology
Allan Dromenge
National Airports Corporation - Civil Aviation Development Investment Programme
Date Written: February 19, 2017
Abstract
With the rise in population in Pakistan, the number of vehicles is also increasing, these increasing numbers of vehicles cause problems for existing road structures in terms of distress, failures, and the environment in terms of pollutant gases and landfills. The purpose of this study is to cater to both the problems, i.e., structural and environmental. The study covers the use of crumb rubber which is obtained from waste rubber tires of vehicles, in bitumen Grade 60/70 of Attock oil refinery, so that the properties of bitumen can be enhanced. Crumb rubber was ground and mixed in bitumen at different percentages for testing the softening point, Ductility, penetration, and flash and fire point. Results indicated that the addition of crumb rubber enhanced different properties i.e. reduced penetration, increased softening point and flash and fire point, and reduced ductility.
Keywords: distresses, crumb rubber, flash point
Suggested Citation:
Betasolo, Mirzi and Dromenge, Allan, Strengthening Rabaul Volcanic Ash (RVA) Cement Compressibility with the Addition of Lime (February 19, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=2971147
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=2971147
A Comparative Evaluation of the Structural Performance of Papua New Guinea River Gravel Using the Repeat Load Triaxial (RLT) - a Performance - Based Test
8 Pages Posted: 12 Dec 2017
Maling Ambranga
Department of Works
Rod Fincham
Cardno
Mirzi Betasolo
Papua New Guinea University of Technology
Date Written: February 19, 2017
Abstract
Roads in Papua New Guinea (PNG) do not appear to perform to design expectations. Premature pavement failure followed by rapid deterioration seems to be the current trend in PNG’s road systems. Most roads in PNG are built using river gravel as unbound granular material (UGM) for pavement. The use of river gravels is believed to be one of the causes of early pavement failure in PNG even though it complies with the current specifications. The present method of characterizing the unbound granular pavement base materials which are the most critical component of the pavement layer is inadequate. The current empirical characterization and specification of pavement materials are ineffective in that the tests employed do not take into account the real in-service performance of the pavement under cyclic traffic loading. Recent developments and advancements in pavement engineering have revealed that the relevant materials’ characteristic parameters should undergo testing through more representative performance-based tests. These new tests offer more insight into the physical behavior for fair characterization by simulating the in-service conditions of the pavement materials under cyclic traffic loadings. In this study, four samples of common PNG base course materials including river gravel were tested in New Zealand using the Repeat Load Triaxial (RLT) testing apparatus (a performance-based test). The results showed that the river gravels were extremely moisture-sensitive compared to coronous and limestone. Thus, the study concluded that the use of River Gravel as UGM is one of the leading causes of premature pavement failure that contributes to poor road performances in PNG.
Keywords: Unbound, Granular Materials, Pavement, Base Materials, Performance-Based Tests
Suggested Citation:
Ambranga, Maling and Fincham, Rod and Betasolo, Mirzi, A Comparative Evaluation of the Structural Performance of Papua New Guinea River Gravel Using the Repeat Load Triaxial (RLT)- a Performance-Based Test (February 19, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=3084408
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3084408
Polypropylene Fiber (Disposable Plastic Cups) Reinforced Autoclaved Concrete
5 Pages Posted: 30 Jan 2018
Mirzi Betasolo
Papua New Guinea University of Technology
Anna Lageo
Papua New Guinea (PNG) University of Technology, Department of Civil Engineering, Students
William Kasai
Papua New Guinea (PNG) University of Technology, Department of Civil Engineering, Students
Relvie Kathoa
Papua New Guinea (PNG) University of Technology, Department of Civil Engineering, Students
William Kipit
Papua New Guinea (PNG) University of Technology, Department of Civil Engineering, Students
Samson Kueyak
Papua New Guinea (PNG) University of Technology, Department of Civil Engineering, Students
Date Written: December 10, 2017
Abstract
The fast-food chain has brought several innovations in food holders including plastic cups and other food packaging made from polypropylene. It is extruded into many plastic products because of its toughness, flexibility, lightweight, and heat resistance built up by the polymerization of propylene. Due to its convenience and lightweight, it adds to the vast accumulation of wastes thrown into a temporary dumpsite of the Papua New Guinea University of Technology (PNGUOT) located adjacent to the PNGUOT Forest Habitat. It also adds to the large numbers of waste burned on the University premises. The method of utilization of this essential and most common type of product in many households, offices, and mess halls, is to recycle it by making it as a fiber reinforcement to concrete. Polypropylene can withstand heat up to 160oC and the curing used for the polypropylene fiber reinforced concrete is by autoclave, a high steam electric machine at 121oC at a constant pressure of 220 KPa. The result shows that the polypropylene fiber has a sound reinforcement effect on concrete and has a compressive strength that of lightweight concrete.
Keywords: Polypropylene, Autoclaved Concrete, Lightweight Concrete, Fiber Reinforced Concrete
Suggested Citation:
Betasolo, Mirzi and Lageo, Anna and Kasai, William and Kathoa, Relvie and Kipit, William and Kueyak, Samson, Polypropylene Fiber (Disposable Plastic Cups) Reinforced Autoclaved Concrete (December 10, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016, Available at SSRN: https://ssrn.com/abstract=3085379
To Download the full paper:
Available at SSRN: https://ssrn.com/abstract=3085379
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