scholarly journals Analysis and Stabilization of Dredged Material Using Marble Dust for Its Potential Use in Sub-Grade

2021 ◽  
Vol 9 (9) ◽  
pp. 1133-1138
Author(s):  
Hamid Altaf
Keyword(s):  
Construction Projects ◽  
Environmentally Friendly ◽  
Dredged Material ◽  
Waste Products ◽  
Dredged Materials ◽  
Rivers And Lakes ◽  
Silica Alumina ◽  
Marble Dust ◽  
Grade Material ◽  
Potential Use

Abstract: This research paper deals about the experimental study on the stabilization of dredged material for its potential use in sub-grade. Large amounts of sediments are dredged from rivers and lakes as a result of environmental dredging in India. These dredged materials have poor geotechnical properties and are treated as wastes, On the other hand, there is a huge demand of sub-grade materials due to the increasing number of highway construction projects, so therefore it forms the significant topic for research. The stabilization of dredged material by marble dust is considered as an environmentally friendly option and economical because both marble dust and dredged material are waste products. Marble dust is formed by the cutting and polishing of marble stone. Marble dust contains high amount of calcium, silica, alumina which aids in the stabilization of the dredged material. Thus, the use of DM as sub-grade material may be considered as an environmentally friendly and economical option. Keywords: Dredged material, stabilization, environmental dredging, Subgrade etc

Organic Based Heat Stabilizers for PVC: A Safer and more Environmentally Friendly Alternatives

2015 ◽  
Vol 659 ◽  
pp. 321-326 ◽  
Author(s):  
Aran Asawakosinchai ◽  
Chanchra Jubsilp ◽  
Sarawut Rimdusit
Keyword(s):  
Room Temperature ◽  
New Technology ◽  
Environmentally Friendly ◽  
Mechanical Analysis ◽  
Pipe Production ◽  
Short Term ◽  
Zinc Compounds ◽  
Heat Stabilizer ◽  
Pvc Pipe ◽  
Potential Use

Organic based stabilizers have been considered as a new technology providing environmentally friendly heat stabilizer for PVC pipe production to substitute conventional lead stabilizer as well as calcium zinc stabilizer. In this research, PVC samples stabilized with 5 types of heat stabilizers i.e. 1) commercial lead stabilizer, 2) commercial calcium zinc stabilizer, 3) commercial organic based stabilizer (OBS), 4) 1,3-dimetyl-6-aminouracil (DAU) and 5) eugenol, were investigated. From dynamic mechanical analysis, storage modulus at room temperature of PVC stabilized with DAU was found to provide the highest value among those stabilizers. Glass transition temperature of the PVC stabilized with all types of heat stabilizers was determined to be approximately 99°C except the value of about 89°C in eugenol stabilized PVC. Furthermore, PVC stabilized with commercial lead, calcium zinc stabilizer and commercial OBS could be reprocessed up to at least 5 cycles. Whereas, PVC stabilized with DAU was found to be able to withstand the processing cycle up to 4 cycles. Additionally, PVC stabilized with DAU showed the most outstanding short term thermal stability and can maintain its original color for at least up to 4 processing cycles. Finally, repeated processing of PVC stabilized with each type of heat stabilizers showed negligible effect on mechanical properties for at least up to 3 processing cycles. From the above results, it is evident that DAU showed high potential use as a safe and effective organic based heat stabilizer for PVC to substitute traditional lead or calcium zinc compounds.

scholarly journals Zoning Marine Disposal to Minimize Environmental Impacts for Dredged Material Management: A Case Study in Hai Phong Port Area, Vietnam

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Lan Dinh Tran ◽  
Do Gia Khanh ◽  
Do Thi Thu Huong ◽  
Vu Duy Vinh
Keyword(s):  
Coastal Waters ◽  
Dredged Material ◽  
Residential Areas ◽  
Conservation Areas ◽  
Material Management ◽  
Dredged Materials ◽  
Port Area ◽  
Aquaculture Area ◽  
Bottom Depth

The fast growth of Hai Phong ports in the two last decades requires not only their upgrading facilities but also expanding port area and dredging their shipping channels (existing and new ones) that generate a huge amount of unreused dredged materials. While all existing dumping sites in sea waters and onland get over capacity, looking for new dumping sites in sea waters is an urgent need. This study is to zone coastal waters of Hai Phong for suitable dumping sites meeting sustainable coastal management. Multi-criteria overlay analysis on GIS platform was employed with criteria of natural conditions, environment and socio-economics for zoning coastal waters of Hai Phong. These criteria were detailed into eight sub-criteria and then developed to eight GIS weighted thematic sub-layers of bottom depth, litho-hydrodynamics, ecosystems, distribution of benthos, distance to residential areas and tourist sites, distance to aquaculture area, distance to ecosystems and distance to conservation areas. Analysis results show the highly suitable zones for dredged material dumping in South, South West Hai Phong at depth below 15m to the deeper areas. Disposals of dredged materials in the zones would minimize impacts on the environment, ecology and socio-economics in surrounding waters and coastal areas. 

scholarly journals Infiltration behaviour of dike covers made of dredged material on the Rostock Research dike

2020 ◽  
Vol 195 ◽  
pp. 01032
Author(s):  
Tim Jurisch ◽  
Stefan Cantré ◽  
Fokke Saathoff
Keyword(s):  
Time Series ◽  
Unsaturated Flow ◽  
Infiltration Rate ◽  
Calibration Method ◽  
Flow Equation ◽  
Full Scale ◽  
Dredged Material ◽  
Suction Pressure ◽  
Dredged Materials ◽  
Hydraulic Behaviour

The knowledge about the infiltration behaviour of a dike body is an important issue in dike design and flood risk assessment. To reduce the risk of stability failures during flood events, the infiltration rate of a dike should be kept low and the elapsing time to reach the saturated steady state should be long. A number of full-scale physical flood simulation experiments on the Rostock research dike, on which different processed dredged materials were applied in the dike body (cover layers in particular) showed that the infiltration time and rate is much higher as can be expected from comprehensive laboratory test data. To obtain information about the unsaturated/saturated hydraulic soil properties of the installed dredged materials in situ, an automatic multi-objective model calibration method for a minimizing problem is used to reduce the residuals between simulated and observed time series (hydraulic head pressure, suction pressure and rate budget). The measured suction pressure time series of these physical experiments lets us suppose, that it is not possible to simulate the suction pressure behaviour of the installed dredged material using RICHARD’s unsaturated flow equation with a proper water retention function and unsaturated flow conductivity. It seems that the hysteresis effects are negligibly small and the hydraulic behaviour is governed by the inter-aggregate pore structure. In the paper, different back-calculation methods to fit the soil hydraulic parameters to the full-scale measurements are discussed and compared a proposal for the evaluation of the data is provided.

Minimizing Construction Emissions Using Building Information Modeling and Decision-Making Techniques

2017 ◽  
Vol 6 (2) ◽  
pp. 14-35 ◽  
Author(s):  
Mohamed Marzouk ◽  
Eslam Mohammed Abdelkader
Keyword(s):  
Decision Making ◽  
Life Cycle Cost ◽  
Construction Projects ◽  
Building Information Modeling ◽  
Primary Energy ◽  
Information Modeling ◽  
Waste Products ◽  
Building Information ◽  
Academic Buildings ◽  
Project Life

The construction industry is regarded as a major contributor to environmental emissions, due to extensive usage of resources and the waste products produced. This article presents a building information modeling (BIM)-based model that is capable of measuring six types of emissions for different activities of construction projects. The paper investigates eight multi-criteria decision-making (MCDM) techniques for ranking alternatives based on project time; project life cycle cost; project environmental impact; and primary energy consumed by different activities. Three group decision- making techniques are performed to provide consensus and final ranking of alternatives. The Monte Carlo simulation is implemented in order to account for the discrepancy in the calculation of greenhouse gases produced from buildings. Also, a case study of academic buildings is introduced in order to demonstrate the practical features of the proposed model.

scholarly journals Agricultural Uses of Juglone: Opportunities and Challenges

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1500 ◽  
Author(s):  
A. K. M. Mominul Islam ◽  
Joshua R. Widhalm
Keyword(s):  
Sustainable Agriculture ◽  
Natural Product ◽  
Environmentally Friendly ◽  
Black Walnut ◽  
Juglans Nigra ◽  
Environmental Threats ◽  
Pest Infestation ◽  
Current State ◽  
Synthetic Pesticides ◽  
Potential Use

Application of conventional synthetic pesticides and agrochemicals has boosted the yield and productivity of crops by reducing pest infestation and promoting crop growth yet increasing reliance on many of these products poses serious environmental threats. This has led to growing interest in obtaining more environmentally friendly alternatives to conventional pesticides and agrochemicals. Allelochemicals produced by plants, fungi, and microbes offer options for developing novel natural product-based pesticides and agrochemicals that are effective but with lower environmental half-lives. Here, we review the current state of knowledge about the potential use of juglone (5-hydroxy-1,4-naphthoquinone), the allelochemical produced by black walnut trees (Juglans nigra), which has been investigated for applications across a range of different agricultural purposes. We then offer our perspective on what opportunities and challenges exist for harnessing juglone as a component of sustainable agriculture.

Experimental Study on the Improvement of High Water Content Dredged Material by Cement and by Quicklime

2014 ◽  
Vol 878 ◽  
pp. 714-719 ◽  
Author(s):  
Ying Hao Huang ◽  
Chan Dong ◽  
Xiao Lei Zhan ◽  
Yun Fei Guan
Keyword(s):  
Water Content ◽  
High Water ◽  
High Water Content ◽  
Dry Density ◽  
Dredged Material ◽  
Test Results ◽  
Environmental Friendly ◽  
Dredged Materials ◽  
Beneficial Uses ◽  
Modified Soil

Dredging is necessary to keep rivers, harbors and lakes function normally. These dredged materials (DM) have poor geotechnical properties and are normally treated as wastes. Thus, utilization of DM for beneficial uses such as fill is being considered as an environmental-friendly and economical option. In this study a dredged material taken from Tai-hu Lake was modified by adding quicklime and by Portland cement. Water content, dry density, plasticity, and California bearing ratio (CBR) of the two types of modified soil were determined and compared. Test results show that both quicklime and cement can evidently decrease the water content and increase dry density, but the former can get better effect relatively. On the other hand, both quicklime and cement can significantly decrease the plasticity characteristics, and change the raw DM classified as CH to MH after modified, moreover, the cement has better effect on the improvement of plasticity. For the same additive content and curing days, the cement modified soil has larger CBR strength than that of the quicklime modified soil. Conclusions of the paper maybe beneficial and useful for the solidification material choose, and for practical dredged material solidification projects.

scholarly journals Application of Environmental Protection and Energy Saving Technology in Building Decoration Engineering

2022 ◽  
Vol 2152 (1) ◽  
pp. 012042
Author(s):  
Lan Kou
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Environmental Protection ◽  
Construction Projects ◽  
Building Materials ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Living Environment ◽  
Protection Technology ◽  
On The Road

Abstract On the road to sustainable development, the concepts of energy saving and environmental protection are deeply rooted in people’s hearts, and their technology has penetrated into all aspects of life. Like the construction industry, with the advancement of environmental protection and energy-saving technologies, the prospects for development will also be huge. Many materials used in construction projects can cause pollution. Although environmental protection technology is supported, its technology cannot remain unchanged. Technical researchers must reduce the risks of materials and continue to innovate and develop environmentally friendly technologies. Only in this way can we continue to make progress, ensure that we have a high-quality construction project, and ensure that energy conservation is consistent with social development. Therefore, to use the qualified construction methods adopted for the renovation project, you can use what you have now and ensure its ecological and human safety. Reduce material costs and reduce environmental pollution caused by indoor raw materials. As a basic framework, it combines the definitions of modern environmental protection and energy-saving technologies, and effectively applies environmental protection and energy efficiency technologies. Decoration and decoration of energy-efficient buildings. Adopt environmental protection technology, rationally use various energy-saving and environmental-friendly materials, and raise awareness of energy conservation and environmental protection. In addition, in-depth discussion and analysis of energy-saving management of building materials and equipment are also conducted. The goal is to improve the awareness of energy conservation and environmental protection in building decoration projects and lay a solid foundation for creating an environmentally friendly and energy-saving living environment. Experimental research results show that people do not know enough about the application of environmental protection and energy-saving technologies in building decoration projects. Therefore, we must increase publicity to let people know better, and we must also increase efforts to innovate in order to better implement and apply. People and regions have better development.

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