Characteristics of EPS Materials and the Application in Road and Bridge Projects

2014 ◽  
Vol 501-504 ◽  
pp. 1418-1423 ◽  
Author(s):  
Yun Hua Luo ◽  
Hai Ying Hu ◽  
Zhi Xing Huang ◽  
Yu Cheng Zhang
Keyword(s):  
Corrosion Resistance ◽  
Correlation Analysis ◽  
Water Resistance ◽  
Expanded Polystyrene ◽  
Differential Settlement ◽  
Bridge Engineering ◽  
Light Water ◽  
The Road ◽  
Soft Foundation ◽  
Road Widening

EPS (Expanded Polystyrene) materials have the features of super light, water resistance, anti-ageing, corrosion resistance and well supporting itself .They are now widely used in civil engineering because of their unique features for its unique characteristics. This paper introduces the properties of EPS and the application of EPS in the road and bridge engineering. The correlation analysis showed that The pressure on the foundation can be greatly reduced by the EPS filling embankment in soft foundation, and the settlement and displacement of the EPS embankment are small and its stability is good. The application of EPS in the embankment of a bridge can solve the bumping problems due to differential settlements of road and bridge. EPSs application can reduce differential settlement in the embankment splicing and strengthen intensity in the embankment splicing, which making the new and old expressway as a union in the road-widening project.

Analisis Kinerja dan Pengaruh Pelebaran Jalan serta Pembuatan Median Jalan (Studi Kasus Jalan Temanggung Tilung Kota Palangkaraya)

2018 ◽  
Vol 7 (1) ◽  
pp. 51-60
Author(s):  
Fitri Wulandari ◽  
Nirwana Puspasari ◽  
Noviyanthy Handayani
Keyword(s):  
Data Retrieval ◽  
Service Level ◽  
Traffic Volume ◽  
Primary Data ◽  
Volume Data ◽  
Saturation Degree ◽  
The Road ◽  
Before And After ◽  
Road Widening ◽  
The Way

Jalan Temanggung Tilung is a 2/2 UD type road (two undirected two-way lanes) with a road width of 5.5 meters, which is a connecting road between two major roads, namely the RTA road. Milono and the path of G. Obos. Over time, the volume of traffic through these roads increases every year, plus roadside activities that also increase cause congestion at several points of the way. To overcome this problem, the local government carried out road widening to increase the capacity and level of road services. The study was conducted to determine the amount of traffic volume, performance, service level of the Temanggung Tilung road section at peak traffic hours before and after road widening. Data retrieval is done by the direct survey to the field to obtain primary data in the form of geometric road data, two-way traffic volume data, and side obstacle data. Performance analysis refers to the 1997 Indonesian Road Capacity Manual (MKJI) for urban roads. From the results of data processing, before increasing the road (Type 2/2 UD), the traffic volume that passes through the path is 842 pcs/hour and after road widening (Type 4/2 UD) the traffic volume for two directions is 973 pcs/hour, with route A equaling 528 pcs/hour and direction B equaling 445 pcs/hour. Based on the analysis of road performance before road enhancement, the capacity = 2551 pcs/hour, saturation degree = 0.331, and the service level of the two-way road are level B. Based on the analysis of the performance of the way after increasing the way, the direction capacity A = 2686 pcs/hour and direction B = 2674 pcs /hour, saturation degree for direction A = 0.196 and direction B = 0.166, service level for road direction A and direction B increase to level A

Waste Plastic Sachet as Alternative Anti-Corrosion Filler for Iron Oxide in Resin Coatings

2021 ◽  
Vol 877 ◽  
pp. 9-14
Author(s):  
Francis Darwin T. Eugenio ◽  
Bryan B. Pajarito
Keyword(s):  
Corrosion Resistance ◽  
Iron Oxide ◽  
Film Thickness ◽  
Iron Oxides ◽  
Water Resistance ◽  
Inorganic Compounds ◽  
Environmental Issues ◽  
Metal Coatings ◽  
Waste Plastic ◽  
Coating Mixture

Iron oxides and similar inorganic compounds have served as anti-corrosion fillers for metal coatings. Environmental issues related to the mining of metallic fillers have stimulated interest in alternative fillers such as organic fillers. This paper explores the use of comminuted waste plastic sachets (WPS) as an anti-corrosion filler to resin-based metal coating. Mixture design of experiment was used to study the effect of iron oxide-WPS blends on the film thickness, viscosity, corrosion behavior, and water resistance of the coating. Results show that the film thickness was affected by the presence of iron oxide while the viscosity of the coating was affected by high loads of WPS. Among all coatings, the blend containing 25% iron oxide and 75% WPS produced the highest corrosion resistance. In conclusion, comminuted WPS provided additional corrosion resistance and could serve as an alternative anti-corrosion filler.

Effect of electrolysis parameters on corrosion resistance of extra-low carbon high silicon iron-based alloy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yue Zhang ◽  
Jun Xiao ◽  
Shaoguang Yang ◽  
Aimin Zhao
Keyword(s):  
Corrosion Resistance ◽  
Correlation Analysis ◽  
Corrosion Rate ◽  
Low Carbon ◽  
Silicon Iron ◽  
Content Type ◽  
Grey Correlation ◽  
Grey Correlation Analysis ◽  
Iron Based ◽  
High Silicon

Purpose High silicon iron-based alloys possess excellent corrosion resistance in certain specific media, but the effects of electrolysis parameters on corrosion resistance remain unknown. This study aims to guide the development and application of an extra-low carbon high silicon iron-based alloy (ECHSIA) in electrode plates. Design/methodology/approach The corrosion resistance of ECHSIA and a conventional high-silicon cast iron (CHSCI) was analyzed through experimental characterizations. The morphology was observed by scanning electron microscopy. The influence of electrolysis parameters on the corrosion resistance of ECHSIA was investigated through corrosion experiments. The relationship between the electrolysis parameters and the corrosion resistance of ECHSIA was statistically investigated using the grey correlation analysis method. Findings The corrosion resistance of the ECHSIA is better than that of the CHSCI. The corrosion rate showed an increasing tendency with the increase in the nitric acid concentration (CHNO3), electrolyte temperature and current density. The grey correlation analysis results showed that the CHNO3 was the main factor affecting the corrosion rate of the ECHSIA. Originality/value An ECHSIA with a single ferrite microstructure was prepared. This study provides a guideline for the future development and application of ECHSIAs as electrode plates.

The Corrosion of HDG Zinc Coatings on the Road and Urban Infrastructures

2015 ◽  
Vol 227 ◽  
pp. 217-220
Author(s):  
Agnieszka Królikowska ◽  
Leszek Komorowski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Corrosion Resistance ◽  
Gravimetric Method ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
The Road ◽  
On The Road ◽  
Zinc Coatings ◽  
Scanning Electron

The standard ISO 14713-1 shows that HDG coatings should protect steel in the corrosive atmosphere C5 for 10–21 years. It was observed that pitting corrosion appears already after 2–3 years on roads and urban infrastructures and both Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) have shown that lead inclusions were present in all such corroded zinc coatings. The laboratory prepared HDG coatings with different amount of lead inclusions were investigated by gravimetric method (after exposure in salt chamber), SEM with EDS, and Glow Discharge Optical Emission Spectrometry (GDOES). The corrosion resistance was analyzed in the polarization tests and local probe techniques. The inclusions could accelerate coating corrosion because lead is cathodic to zinc.

Influence of Different Ways of Foundation Treatment on the Differential Settlement of Road- Tunnel Composite Structure

2010 ◽  
Vol 168-170 ◽  
pp. 323-329
Author(s):  
Zhen Liu ◽  
Cui Ying Zhou ◽  
Wei Huang
Keyword(s):  
Composite Structure ◽  
High Strength ◽  
Differential Settlement ◽  
Natural State ◽  
Road Tunnel ◽  
Nonlinear Fem ◽  
The Road ◽  
Concrete Piles ◽  
Foundation Treatment ◽  
Pressure Grouting

In order to insure the safe and reliable road-tunnel composite structure, it is important to consider the influence of different foundation treatment ways on the differential settlement of the composite structure. Based on the nonlinear FEM, connecting with the western corridor connecting project from Shenzhen to Hong Kong in China, a numerical model has been established to estimate the settlement of the road- tunnel composite structure under three different foundation treatment ways, such as pressure grouting, PHC piles (prestressed high-strength concrete piles) and foundation in natural state. This study shows that the influence of the different foundation treatment ways on the transverse and longitudinal differential settlement of the composite structure of road-tunnel is strong. The results from this study provide a useful guideline for settlement control of other similar projects composed of tunnel and road structure.

scholarly journals Fracture Resistance of Cast Austenitic Stainless Steels

2016 ◽  
Author(s):  
Y. Chen ◽  
W-Y. Chen ◽  
A. S. Rao ◽  
Z. Li ◽  
Y. Yang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Growth Rate ◽  
Corrosion Resistance ◽  
Neutron Irradiation ◽  
Stainless Steels ◽  
Thermal Aging ◽  
Austenitic Stainless Steels ◽  
Light Water Reactor ◽  
Delta Ferrite ◽  
Light Water

Cast austenitic stainless steels (CASS) possess excellent corrosion resistance and mechanical properties and are used alongside with wrought stainless steels (SS) in light water reactors for primary pressure boundaries and reactor core internal components. In contrast to the fully austenitic microstructure of wrought SS, CASS alloys consist of a dual-phase microstructure of delta ferrite and austenite. The delta ferrite is critical for the service performance since it improves the strength, weldability, corrosion resistance, and soundness of CASS alloys. On the other hand, the delta ferrite is also vulnerable to embrittlement when exposed to reactor service temperatures and fast neutron irradiations. In this study, the combined effect of thermal aging and neutron irradiation on the degradation of CASS alloys was investigated. Neutron-irradiated CASS specimens with and without prior thermal aging were tested in simulated light water reactor environments for crack growth rate and fracture toughness. Miniature compact-tension specimens of CF-3 and CF-8 alloys were tested to evaluate the extent of embrittlement resulting from thermal aging and neutron irradiation. The materials used are static casts containing more than 23% delta ferrite. Some specimens were thermally aged at 400 °C for 10,000 hours prior to the neutron irradiation to simulate thermal aging embrittlement. Both the unaged and aged specimens were irradiated at ∼320°C to a low displacement damage dose of 0.08 dpa. Crack growth rate and fracture toughness J-integral resistance curve tests were carried out on the irradiated and unirradiated control samples in simulated light water reactor environments with low corrosion potentials. While no elevated crack propagation rates were detected in the test environments, significant reductions in fracture toughness were observed after either thermal aging or neutron irradiation. The loss of fracture toughness due to neutron irradiation seemed more evident in the samples without prior thermal aging. Transmission electron microscope (TEM) examination was carried out on the thermally aged and neutron irradiated specimens. The result showed that both neutron irradiation and thermal aging can induce significant changes in the delta ferrite. A high density of G-phase precipitates was observed with TEM in the thermally aged specimens, consistent with previous results. Similar precipitate microstructures were also observed in the neutron-irradiated specimens with or without prior thermal aging. A more extensive precipitate microstructure can be seen in the samples subjected to both thermal aging and neutron irradiation. The similar precipitate microstructures resulting from thermal aging and neutron irradiation are consistent with the fracture toughness results, suggesting a common microstructural origin of the observed embrittlement after thermal aging and neutron irradiation.

scholarly journals The Knowledge Domain of The Baltic Journal of Road and Bridge Engineering Between 2006 and 2019

2020 ◽  
Vol 15 (2) ◽  
pp. 1-30 ◽  
Author(s):  
Wei Zhou ◽  
Zeshui Xu ◽  
Edmundas Kazimieras Zavadskas ◽  
Alfredas Laurinavičius
Keyword(s):  
Construction Materials ◽  
Bridge Engineering ◽  
Knowledge Domain ◽  
Engineering Research ◽  
The Road ◽  
Baltic Countries ◽  
Emerging Trends ◽  
The Status ◽  
The Baltic ◽  
Engineering Investigation

The Baltic Journal of Road and Bridge Engineering is a multidisciplinary journal, which provides a forum for a broad range of road and bridge engineering research. The topics such as the road and bridge research and design, the construction materials and technologies of roads and bridges, the construction financing and environmental issues, and the assessment management are included in the scope of the Baltic Journal of Road and Bridge Engineering investigation. Due to the reason that various road and bridge engineering related research directions are involved in this journal, it has become the first one that deals with the issues as mentioned above in Baltic countries. Therefore, it is believed that investigating the publications in the Baltic Journal of Road and Bridge Engineering assists researchers in great learning the development of road and bridge engineering research in Baltic countries. By analysing the annual publication distribution, the citation structure, the co-citation and cooperation networks, and the significant contributors in terms of countries and regions, institutions, cited journals and authors, the status of Baltic Journal of Road and Bridge Engineering is comprehensively presented. In addition, the emerging trends are revealed through the analyses of timeline view and burst detection. This study makes the contribution to the aspect of visualizing the complex and significant results based on objective and quantitative data. It provides readers with access to understand the development of Baltic Journal of Road and Bridge Engineering and helps researchers learn the hot issues in this journal clearly and directly.

scholarly journals Transport infrastructure of centres in the Czech borderland

Geografie ◽  
2003 ◽  
Vol 108 (2) ◽  
pp. 130-145
Author(s):  
Miroslav Marada
Keyword(s):  
Population Density ◽  
Correlation Analysis ◽  
Road Network ◽  
Point Of View ◽  
Transport Infrastructure ◽  
Regional Differentiation ◽  
The Road ◽  
Border Regions ◽  
Economic Level

The article deals with the regional differentiation of Czechia at several levels: between inland and borderland, between the urbanized and the rural border regions and finally among nine individual border regions. The following characteristics are used for evaluation: mainly the aggregate and the relativized transport characteristics (quality and density of the railway and the road network; the rate of motorcars) and then the selected "causal" characteristics (population density, education index, economic level). Their interdependence is assessed with the help of correlation analysis. The inland - borderland differences are in the specific Czech conditions limited also from the viewpoint of the monitored transport characteristics - substantial differences are found within the Czech borderland, above all between the urbanized and the rural border regions. Another type of evaluation in this article is the research into the hierarchization of 170 centres from the point of view of their transport and complex significance. The transport hierarchy of centres is markedly more developed in the inland than in the borderland.

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