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2nd International Conference on Sustainable Civil engineering and Architecture, ICSCEA 2021

作者： Kirimoto, Taishi Ogawa, Yuko Kawai, Kenji Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University Higashihiroshima City Japan

ISBN: (纸本)9789811933028

The purpose of this study was to clarify the relationship between the internal curing effect of roof-tile waste aggregate and frost damage resistance, and to investigate the effects of the replacement ratio of roof-tile waste aggregate as well as curing conditions on the frost damage resistance of concrete. Five types of concrete using Portland blast-furnace slag cement were prepared with a water-to-cement ratio of 0.50 and different replacement ratios of roof-tile waste coarse aggregate (20% and 50% by volume) and roof-tile waste fine aggregate (23% and 58% by volume). Concrete specimens were cured at 20 °C under sealed condition for 3, 7, or 28 days, and they were subsequently exposed to air at 20 °C and 60%R.H. until the age of 28 days. Then, the tests for resistance of concrete to freezing and thawing were carried out for 300 cycles in water, and the relative dynamic modulus of elasticity as well as the mass loss was assessed at the designated periods. As a result, it was found that sufficient frost damage resistance could be secured when the replacement ratio of roof-tile waste aggregate was approximately 20% by volume, and the improvement in frost damage resistance was observed especially when fine aggregate was replaced. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Slags

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Multi-layered shear model test to simulate rain-induced pre-failure shear deformation in surface layer of slopes 16

Multi-layered shear model test to simulate rain-induced pre-...

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16th Asian Regional Conference on Soil Mechanics and Geotechnical engineering, ARC 2019

作者： Fukuhara, Makoto Tao, S. Uchimura, T. International Graduate Program on Civil and Environmental Engineering Saitama University Saitama Japan Department of Civil and Environmental Engineering Saitama University Saitama Japan

The time-dependent developments of the strain observed on the slope surface in pre-failure stages are often expressed in analogy with the development of strain at creep fracture of metals. Therefore, several equations for prediction of slope failure using the creep models have been proposed and used. In this study, multi-layered shear model test apparatus was developed to observe detailed movement of the surface layer of slope before failure. And, the conventional methods to predict the failure time were validated based on the test results. Copyright © Soil Mechanics and Geotechnical engineering, ARC *** rights reserved.

关键词： Failure (mechanical)

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Multi-Criteria Spatial Analysis of Hazardous Materials Transportation 2

Multi-Criteria Spatial Analysis of Hazardous Materials Trans...

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2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014

作者： Cordeiro, Francyelly Giovany Bezerra, Barbara Stolte Peixoto, Anna Silvia P. Kaiser, Ilza Machado UNESP - Univ. Estadual Paulista Graduate Studies Program in Civil and Environmental Engineering Brazil

ISBN: (纸本)9780784413609

The development of the world economy increases trade, thereby inducing a large amount of goods transportation. In many developing countries, such as Brazil, the transportation system is predominated by the highway mode. Municipal highways, most of time, are part of the main road cargo transportation system, and this makes the traffic of hazardous materials a risk to society and the environment. The goal of the paper is the use of a multi-criteria analysis methodology, for modeling of the environmental risk of Road Transport of Hazardous Materials (RTHM) in Sao Paulo State - Brazil. Therefore, a methodological discussion is presented to explore the issues inherent to the composition of the panel of experts to assign weights to each criterion and to quantify the relative importance of each for risk analysis of environmental damage. © 2014 American Society of Civil Engineers.

关键词： Risk analysis

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Reversible adsorption of metalworking fluids (MWFs) on Cu-BTC metal organic framework

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Chinese Journal of Chemical engineering 2017年第6期25卷 768-774页

作者： Kwannapat Sorachoti Bhuckchanya Pangkumhang Visanu Tanboonchuy Sarttrawut Tulaphol Nurak Grisdanurak International Program in Hazardous Substance and Environmental Management Graduate School Chulalongkom University Bangkok Thailand Center of Excellence on Hazardous Substance Management ( HSM) Chulalongkorn University. Bangkok Thailand Department of Environmental Engineering Faculty of Engineering Khon Kaen University Khon Kaen Thailand Department of Chemical Engineering Faculty of Engineering Thammasat University Pathumthani Thailand Center of Excellence in Environmental Catalysis and Adsorption Thammasat Unive-rsity Pathumthani Thailand

Metalworking fluids(MWFs) are classified as hazardous substances. Due to the characteristics of the stable oil–water emulsions, it requires more costly and complicate treatment techniques to remove oil from spent MWFs. Metal organic frameworks(MOFs) are a porous network material used to remove contaminants from environment. One of the most prominent of MOFs is HKUST-1 or Cu-BTC. In this study, the Cu-BTCs were prepared by solvothermal method in various conditions and used as absorbent for removing oil micelles in MWF emulsion. The particle size of all synthesized Cu-BTCs ranged from ≈80 to 400 nm. The ability of all synthesized Cu-BTCs to remove oil micelle was greater than 95% in 60 min, while the capacity of GAC was obtained the result for only 6.8%. The maximum adsorption capacity(q _(max)) of oil micelles on Cu-BTCs was 1666.7 mg·g^(-1). The highest removal capacity of oil micelles in MWF emulsion is greater than 99% in 24 h by using Cu-BTCs washed with either butanol or ethanol.

关键词： Metalworking fluids Cutting fluids Metal organic frameworks

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A Review on Landfill Management in the Utilization of Plastic Waste as an Alternative Fuel 2

A Review on Landfill Management in the Utilization of Plasti...

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2nd International Conference on Energy, environmental and Information System, ICENIS 2017

作者： Hidayah, Nurul Syafrudin Master Program of Environmental Science School of Post Graduate Studies Diponegoro University Indonesia Environmental Engineering Dept Faculty of Engineering Diponegoro University Indonesia

Wastes from landfills originate from many spheres of life. These are produces as a result of human activities either domestically or industrially. The global plastic production increased over years due to the vast applications of plastics in many sectors. The continuous demand of plastics caused the plastic wastes accumulation in the landfill consumed a lot of spaces that contributed to the environmental. In addition, economic growth and development also increased our demand and dependency on plastics which leads to its accumulation in landfills imposing risk on human health, animals and cause environmental pollution problems such as ground water contamination, sanitary related issues, etc. The management and disposal of plastic waste have become a major concern, especially in developing cities. The idea of waste to energy recovery is one of the promising techniques used for managing the waste of plastic. Hence, this paper aims review at utilizing of plastic as an alternative fuel. © 2018 The Authors, published by EDP Sciences.

关键词： Groundwater

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Perception of Disasters and Land Reclamation in an Informal Settlement on Reclaimed Land:Case of the BASECO Compound,Manila,the Philippines

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International Journal of Disaster Risk Science 2020年第5期11卷 640-654页

作者： Ven Paolo Bruno Valenzuela Miguel Esteban Onuki Motoharu Graduate Program in Sustainability Science-Global Leadership Initiative The University of TokyoKashiwaChiba 277-8563Japan Department of Civil and Environmental Engineering Waseda UniversityTokyo 169-8555Japan

Southeast Asia's coastal urban areas continue to grow,with land reclamation fast becoming an important option for megacities to address issues of economic growth and increasing population *** are divided over the advantages and disadvantages of land reclamation,though this process continues unabated,exposing settlements to coastal *** Bataan Shipping and engineering Company(BASECO)compound is an informal settlement on reclaimed land in Manila,the *** informal coastal settlements view disaster risk and their more pressing socioeconomic needs is crucial to understanding the potentials and repercussions of land *** a topographic survey,a questionnaire survey,and the protective action decision model,this study explored the perception of disasters and land reclamation of informal settlers who are living on reclaimed *** study found that people are aware of disaster risks,but are more concerned with everyday *** are divided on the issue of further land *** on the original non-reclaimed land view it as a coastal defense,while those on reclaimed land fear potential *** this,all locations in the community are concerned with the loss of jobs,economic opportunities,and eviction,rather than potential disasters.

关键词： Coastal hazards Flooding Informal settlements Land reclamation Philippines Risk perception Urbanization

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Comparison of thermal performance between test cells with different coverage systems for experimental typical day of heat in Brazilian Southeastern

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Frontiers of Architectural Research 2014年第3期3卷 271-282页

作者： Grace Tiberio Cardoso Francisco Vecchia Graduate Program in Environmental Engineering Sciences University of Sao Paulo Rua Borges Lagoa94 apto 73 Sao Paulo 04038-000 Brazil

This article shows experimentally the thermal performance of two test cells with different coverage systems, Ught Green Roof （LGR） and ceramic roof by analyzing internal surface temperatures （IST） in the ceiling and dry bulb temperatures （DBT）. The objective was to evaluate the spatial distnbution of temperatures in buildings according to spatial and temporal Dynamic CUmato[ogy approaches. An experimental, typical day for heat conditions was determined. The data of the main climatic vari- ables provided by an automatic weather station and temperatures inside the test cells were collected using thermocouples installed such that the entire space is included. The results led to the conclusion that the LGR has a balanced IST and DBT spatial distribution compared with ceramic roofs. Nevertheless, the analysis of the thermal performance is only one of the variables that must be considered when developing a construction proposal that is adapted to the context. The manner in which the thermocouples were placecl inside the test cells also showed the importance of specifying the location of the sensors in experimental studies on the behavior and thermal performance of buildings.

关键词： Light Green Roof（LGR） Thermal perfor-mance Dynamic Climatology Internal tempera-tures Spatial distribution Experimental typicalday

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Sorption-enhanced steam gasification of fine coal waste for fuel producing

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Journal of King Saud University - engineering Sciences 2024年第2期36卷 81-88页

作者： Aprianti, Nabila Faizal, Muhammad Said, Muhammad Nasir, Subriyer Doctoral Program of Environmental Science Graduate School Universitas Sriwijaya South Sumatra Palembang30139 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Sriwijaya South Sumatra Ogan Ilir30662 Indonesia

Improving the quality of syngas from fine coal waste using the sorption-enhanced gasification process is a novel technology in the production of H2. The effect of CaO on CO2 absorption and H2 increase in the steam fine coal gasification process was determined in a fixed bed gasifier. The steam gasification process took place at 650 °C using bentonite and CaO as catalysts and absorbents. Steam increased the H2 concentration in the syngas to 58 vol%. In-situ CO2 absorption is more effective with the addition of CaO. The maximum percentage of CO2 was absorbed when the Ca/C ratio 2 was 78.33 %. The H2 content in the syngas after the CO2 was absorbed increased rapidly to 75.80 vol% at a Ca-to-carbon-mole ratio (Ca/C) of 1.5 and a steam-to-feedstock ratio (S/F) of 1.5. CaO did not produce significant results for low heating value (LHV) or cold gas efficiency (CGE), with results of 12 MJ/Nm3 and 44.53 %. The dominant water gas shift reaction due to the influence of steam and CaO increased H2/CO up to 9.11, which made the syngas from this work suitable for Fischer–Tropsch synthesis. © 2022 The Authors

关键词： Carbon dioxide

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Aquifer System, Recharge-Discharge Zone and Groundwater Basin Boundary Mapping to Support Open and Transparent Water Data, Case Study: Karangkobar Groundwater Basin 4

Aquifer System, Recharge-Discharge Zone and Groundwater Basi...

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4th International Conference on Energy, Environment, Epidemiology and Information System, ICENIS 2019

作者： Putranto, Thomas Triadi Luthfi, Muhammad Iman Qadaryati, Nurakhmi Santi, Narulita Hidajat, Wahju Krisna Geological Engineering Engineering Faculty Diponegoro University Semarang Indonesia Graduate Program of Environmental Science Diponegoro University Semarang Indonesia

Sustainable groundwater management based on groundwater basin (GWB) must be equipped with comprehensive information including the characteristic of hydrogeology. This management method is very useful for governments to design some regulations, such as tax and conservation zone. Nowadays, not only the government but the public society can also have access to know this management. Open and transparent groundwater application needs sufficient data. Based on that issue, this research aims to provide the geological and hydrogeological conditions of GWB, define the aquifer configurations, and determine the groundwater recharge-discharge zones and the type of GWB boundary on Karangkobar GWB. The methods applied to the study are 1) mapping the geological and hydrogeological condition;2) reconstruction of subsurface stratigraphic condition;and 3) overlay four parameters of the recharge-discharge zone. The Karangkobar GWB consists of the unconfined and confined aquifer of High Plain Aquifer, where the groundwater flows from north and east heading southward and westward. Seven boundary types bounded the Karangkobar GWB. The map can also support the open and transparent water data application system, it will also ease the party that will conduct an assessment to design regulation regarding the groundwater management. © The Authors, published by EDP Sciences, 2019.

关键词： Aquifers

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Coupling artificial neural networks and genetic algorithms in redesigning existing cities for flood resistance 7

Coupling artificial neural networks and genetic algorithms i...

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7th International Conference on Advances in Computer-Human Interactions, ACHI 2014

作者： Cruz, Gene Oliver Ballesteros, Florencio Blanco, Ariel Environmental Engineering Graduate Program University of the Philippines Quezon City Philippines Department of Geodetic Engineering University of the Philippines Quezon City Philippines

ISBN: (纸本)9781612083254

Cities are becoming more vulnerable to natural hazards due to increasing concentration of urban population and resources as well as to changing weather patterns caused by climate change. Adding to the aggravation of urban vulnerability is the socio-economic conditions of its population. More often, the poor are those who are severely affected and have no economic means to recover. Eventually, the local government takes the responsibility of providing services to restore and rehabilitate affected communities. This impacts the cities' economic base by reducing their ability to grow and raise revenue. In order to minimize economic losses caused by a disaster, it is important to assess the communities' vulnerabilities and plan ahead before a disaster strikes. This paper explores the use of neural networks and genetic algorithms as support tools for an integrated urban development and disaster risk reduction planning and decision making. Copyright © IARIA, 2014.

关键词： Neural networks

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