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SSRN 2024年

作者： Sae-Long, Worathep Chompoorat, Thanakorn Limkatanyu, Suchart Damrongwiriyanupap, Nattapong Sukontasukkul, Piti Chub-Uppakarn, Tanan Thepumong, Thanakit Civil Engineering Program School of Engineering University of Phayao Phayao56000 Thailand Department of Civil and Environmental Engineering Faculty of Engineering Prince of Songkla University Songkhla90110 Thailand Construction and Building Materials Research Center Department of Civil Engineering King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand

Recycled concrete aggregate (RCA) is widely used as an alternative recycled material in engineering, while para-wood ash (PWA) is a natural agricultural waste product. To advance sustainable construction, it is crucial to thoroughly examine their impact on concrete’s mechanical properties to ensure safety in engineering applications. This paper conducts a series of experiments on recycled aggregate concrete (RAC) with PWA to investigate these replacement effects. RCA replaces natural coarse aggregate (NCA) at 0%, 50%, and 100%, while PWA substitutes cement at 0%, 10%, and 20%. The experiments include compression tests on mortar as well as compressive, tensile, and flexural tests on RAC, along with microstructure investigations. The results indicate a decrease in strength with higher proportions of RCA and PWA. Microstructure investigations were conducted via scanning electron microscopy with energy-dispersive X-ray analysis (SEM/EDX). SEM provides micro images of the testing specimens, while EDX offers insight into their chemical compositions. The EDX results reveal a direct correlation between the Ca/Si ratio and the strengths of mortar and RAC. Correlation studies between compressive strength-replacement parameters, tensile-compressive strength, and flexural-compressive strength demonstrate that the proposed equations accurately predict the experimental data with R2 values of 0.60 (for mortar), and 0.94, 0.95, and 0.71 (for RAC), respectively. Two numerical simulations validate the proposed model and showcase potential engineering applications. Finally, a 10% replacement of PWA for cement can reduce the embodied energy value (EEV) by approximately 9.46% for mortar mixed with PWA and around 10% for RAC mixed with RCA and PWA. © 2024, The Authors. All rights reserved.

关键词： Mortar

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Evolution of large-strain one-dimensional consolidation test for louisiana marsh soil

Evolution of large-strain one-dimensional consolidation test...

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2021 International Foundations Congress and Equipment Expo: Geoenvironmental engineering, Geomaterial Modeling, Transporation Geotechnics, and Case Histories, IFCEE 2021

作者： Apu, Omar Shahrear Wang, Jay X. Sarker, Debojit Program of Civil Engineering Louisiana Tech Univ. RustonLA United States Programs of Civil Engineering and Construction Engineering Technology Louisiana Tech Univ. RustonLA United States

ISBN: (数字)9780784483435

In this paper, statistical analyses were conducted to understand the applicability and reliability of conventional consolidation tests on extremely soft dredged fill material. Of all the consolidated tests reviewed, specially designed and fabricated equipment was used to perform multiple one-dimensional consolidation tests on composite slurry samples prepared from the dredged borrow area. Data of over 30 consolidation tests were analyzed and assessed, and regression equations were proposed to estimate the compression index Cc. By comparing the proposed regression equations with the existing empirical equations, it was discovered that the compression index predicted by a simple linear equation considering the natural moisture content, initial void ratio, plastic limit, and liquid limit could sensibly assess the genuine soil compression index. In any case, the consolidation test on very soft dredged soils is time-consuming and work-intensive;it is likewise observed that the use of empirical equations recommended in this research results in a valuable tool to assess the compression index of the marine clayey soils used in the wetland recovery projects in coastal Louisiana. © ASCE.

关键词： Soils

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Beneficial Use of Dredged Material in Flowable Fill 4th

Beneficial Use of Dredged Material in Flowable Fill

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4th International Conference on Transportation Geotechnics, ICTG 2021

作者： Solanki, Pranshoo Lopez, Juan David Jain, Harshvardhan Jain, Bhupesh Construction Management Program Department of Technology Illinois State University NormalIL61790 United States Department of Technology Illinois State University NormalIL61790 United States Department of Civil Engineering Manipal University Jaipur Jaipur Rajasthan303007 India

ISBN: (纸本)9783030772291

US Army Corps of Engineers (USACE) annually dredge 300 million cubic yards nationwide to maintain channels’ navigation. Treating this huge amount of dredged material is a major challenge due to the mobilization of potential contaminants causing depreciation in water quality and depletion of valuable land. Rather than treating the dredged material as a waste, investigating alternative ways to recycle and reuse the dredged material is needed. Therefore, the aim of this study was to evaluate the feasibility of utilizing dredged material as a substitute for sand in flowable fill. A total of five mixtures were prepared by using different proportions of dredged material and virgin fine aggregates (sand) in flowable fill. Each mixture was tested for flowability and compressive strength. Both flow consistency and strength results were found within required specification for flowable fill. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Dredging

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Influence of Recycled Glass on Strength Development of Alkali-Activated High-Calcium Fly Ash Mortar

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Advances in Materials Science and engineering 2023年第1期2023卷

作者： Damrongwiriyanupap, Nattapong Wongchairattana, Sangsan Phoo-Ngernkham, Tanakorn Petcherdchoo, Aruz Limkatanyu, Suchart Chindaprasirt, Prinya Civil Engineering Program School of Engineering University of Phayao Mae Ka Phayao56000 Thailand Sustainable Construction Material Technology Research Unit Department of Civil Engineering Faculty of Engineering and Technology Rajamangala University of Technology Isan Nakhon Ratchasima30000 Thailand Department of Civil Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok10800 Thailand Department of Civil Engineering Faculty of Engineering Prince of Songkla University Hat Yai Songkla90112 Thailand Sustainable Infrastructure Research and Development Center Department of Civil Engineering Faculty of Engineering Khon Kaen University Khon Kaen40002 Thailand Academy of Science The Royal Society of Thailand Dusit Bangkok10300 Thailand

This article presents the development of green and sustainable mortars using alkali-activated high-calcium fly ash (AAFA) and recycled glass (RG) as part of the fine aggregate. RG was used to replace river sand at dosages of 0%, 25%, 50%, 75%, and 100% by weight. Sodium hydroxide (SH) and sodium silicate (SS) solutions were used as liquid alkaline activators in all mixtures. The AAFA samples were prepared with different liquid-to-binder ratios of 0.6 and 0.7, and the ratio of SS-to-SH was fixed at 2.0. Compressive and flexural strengths were determined at the ages of 7, 28, and 60 days. Test results showed that the compressive and flexural strengths of AAFA mortars declined as RG replacement increased;nevertheless, they increased with curing time. The high Na2O concentration derived from RG and the weak interfacial transition zone of RG are reasons for the decrease in strength development. The optimum percentage replacement of fine aggregates with RG was found at 25%. The 28-day compressive strength of AAFA with 25% RG was 32.5 MPa for L/B ratios of 0.6 and 29.5 MPa for L/B ratios of 0.7, which resulted in a strength index higher than 75% while releasing low CO2. © 2023 Nattapong Damrongwiriyanupap et al.

关键词： Mortar

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Waste Plastics and Microplastics in Africa: Negative Impacts and Opportunities

Waste Plastics and Microplastics in Africa: Negative Impacts...

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2021 AIChE Annual Meeting

作者： Abdellatif, Gaber Mahmoud, Ahmed S. Peters, Robert W. Mostafa, Mohamed K. Environmental Engineering Program Zewail City of Science and Technology Giza Egypt Badr Egypt Department of Civil Construction and Environmental Engineering University of Alabama at Birmingham BirminghamAL United States Cairo Egypt

ISBN: (纸本)9781713852834

Waste plastics and microplastic pollution are two of the most pressing global issues during the past few decades, since the beginning of plastic mass production either for direct use in packaging and plastic products, or for indirect use for plastic dependent industries. The issue is even more problematic for Africa due to the late catch-up of the industrialization and urbanization boom for most of the African countries, which is usually accompanied with intensive production, consumption, and waste generation of plastics. Moreover, the growing population, cheaper costs of plastic products, and minor importance of Environmental conservation in developing countries in Africa are making it an easy choice to expand in plastic use and wastage. African countries have imported about 172 Mton of polymers and plastics valued between 1990 and 2017, and the per capita consumption of plastic in Africa in 2015 was 16 kg/capita/year. While plastic is very important for populations, inappropriate disposal or treatment of plastic waste can introduce hazardous and toxic materials to our environment and ecosystem like microplastics that usually consists of persistent polymers, and other toxic plastic additives like plasticizers, antioxidants, and stabilizers. Moreover, 79% of plastic waste worldwide is being discharged to landfills or open environments. That's why mixed plastic waste was listed as hazardous waste in the Basel Convention. Therefore, this paper provides a review of the life cycle of plastics in. Production and importing will be discussed, important usages will also be elaborated, and most importantly plastic waste production and current plastic waste management techniques will be evaluated and highlighted, and drawbacks of current strategies will be addressed. Finally, recommendations about better waste management strategies will be provided. © 2021 American Institute of Chemical Engineers. All rights reserved.

关键词： Plastic products

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Investigation of the soil behaviour of Fethiye District, Mesudiye, Muğla, by one-dimensional equivalent linear analysis method

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Arabian Journal of Geosciences 2022年第9期15卷 1-14页

作者： Yılmazoğlu, Mehmet Uğur İnce, Gökçe Çiçek Civil Engineering Department Faculty of Engineering and Architecture Kastamonu Univ Kastamonu Turkey Construction Technology Program Muğla Higher Education Academy Muğla Sıtkı Koçman Univ Mugla Turkey

Soil behaviour during earthquakes is just as important as the prediction of earthquakes. Seismic waves alter the soil strata that they traverse during earthquakes, and the strata may also change the properties of seismic waves. Conditions such as the type, stratification status, and combinations of the strata can also create different effects in the seismic wave. With dynamic soil behaviour analysis, the effects of earthquake ground motion and ground performance on general performance can be obtained by the change in acceleration parameters. In this study, one-dimensional dynamic analysis was carried out using the EERA (Bardet et al., EERA: A computer program for equivalentlinear earthquake site response analyses of layered soil deposits, University of Southern California, Los Angeles, 2000) program by using the drilling information of the Karaböğürtlen formation, which consists of alluvium, coastal sediment and siltstone, claystone, and sandstone units in the selected region. For this purpose, idealised soil profiles were created by using the drilling information from the region of Mesudiye in the province of Muğla, district of Datça. Acceleration values, which varied in depth and surface acceleration values, were obtained as a result of one-dimensional analysis using national and international characteristic earthquake acceleration records selected from the literature. Since the dynamic and kinematic structure related to the deformation in the region is extremely complex and there is no generally accepted model, different mechanism situations have been examined using the characteristic earthquake records that have happened in the world. According to the results, similar results were obtained in earthquakes with the same mechanism; it was observed that the acceleration values which were occurred in the earthquake records with different mechanisms had been changed. Moreover, it was calculated that the greatest amplification is in beach sediments composed of sand and

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Application of sustainable lignin stabilized expansive soils in highway subgrade

Application of sustainable lignin stabilized expansive soils...

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2021 International Foundations Congress and Equipment Expo: Geoenvironmental engineering, Geomaterial Modeling, Transporation Geotechnics, and Case Histories, IFCEE 2021

作者： Sarker, Debojit Shahrear Apu, Omar Kumar, Narendra Wang, Jay X. Lynam, Joan G. Program of Civil Engineering Louisiana Tech Univ. RustonLA United States Dept. of Chemical Engineering Louisiana Tech Univ. RustonLA United States Programs of Civil Engineering and Construction Engineering Technology Louisiana Tech Univ. RustonLA United States

ISBN: (数字)9780784483435

A by-product of the paper and wood industries, lignin is produced abundantly worldwide due to the increasing demand for wood and paper-based products. Improper disposal or storage of lignin is not only a misuse of natural resources but also poses a critical hazard to public health and the environment. construction of highway subgrade has been identified as one of the feasible responses for consuming vast quantities of lignin to dispose of it in an ecologically sound manner, as it can be a low-cost and less energy-intensive chemical additive for soil stabilization. However, studies on the performance of lignin in stabilizing expansive soils in highway subgrade have been very constrained. Volume change resulting from seasonal moisture variations in expansive soil subgrades damages existing highways and complicates highway construction in expansive soil areas. To reduce expansive soil-induced geological disasters and utilize waste resources, the use of lignin could potentially be a sustainable solution for soil stabilization. In this research, a series of multi-scale laboratory tests were conducted to examine the Atterberg limits, the compaction and consolidation behavior, and the Fourier-transform infrared spectroscopy (FTIR) characteristics of lignin-stabilized expansive soils. The study reveals that the degree of lignin content impacts the physical, mechanical, and microstructural properties of the stabilized expansive soil. From the compression index (Cc) and swelling index (Cs) values, it was concluded that a satisfactory level of soil stabilization could be achieved by the application of an optimum percentage of lignin. The lignin-based cementing material bonds soil particles firmly together and fills the pores to produce a progressively steady soil structure. © ASCE.

关键词： Fourier transform infrared spectroscopy

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Insights on the irrigation conveyance efficiency of three canal systems for improving agricultural sustainability in Sri Lanka

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Water Supply 2025年第5期25卷 807-824页

作者： Sumanasekara, Harindu S. Jayasinghe, Ananda Herath, Anjana B. Siriwardhana, Kushan D. Imbulana, Indra L. Mullegamgoda, Kithsiri Herath, Ruchiru Paranavithana, Ganila Rathnayake, Upaka 07 Colombo Sri Lanka Improving System Efficiencies and Water Productivity Project Mahaweli Water Security Investment Program 10 Colombo Sri Lanka Engineering and Design Center Faculty of Engineering University of Peradeniya Peradeniya20400 Sri Lanka Water Resources Management and Soft Computing Research Laboratory Millennium City Athurugiriya10150 Sri Lanka Department of Civil Engineering Faculty of Engineering Technology The Open University of Sri Lanka Nugegoda10250 Sri Lanka Department of Civil Engineering and Construction Faculty of Engineering and Design Atlantic Technological University SligoF91 YW50 Ireland

System conveyance efficiency of the canals is highly important in planning new irrigation development schemes. Enhancing the efficiencies directly influences sustainable agricultural practices. This study, conducted in 2022–2023, assessed conveyance losses in three major irrigation schemes in Sri Lanka: Maduru Oya, Hurulu Wewa, and Minipe Left Bank Canal. The research aimed to quantify current conveyance losses and identify factors influencing efficiency to inform rehabilitation efforts. Field measurements were taken using the float method to determine flow rates at multiple points along selected canals. Conveyance losses were calculated as the percentage difference in flow between measurement points. Results showed significant variations in losses across the three systems: Maduru Oya averaged 27.8% (standard deviation (SD) = 6.03%), Hurulu Wewa 26.5% (SD = 20.4%), and Minipe Left Bank Canal 33.1% (SD = 15.4%) for the D47 canal and 27.7% (SD = 23.7%) for the D32 canal. Factors observed to influence conveyance losses included canal lining condition, soil texture, and topographical features such as elevation differences between drainage and field canals. The study concludes that targeted rehabilitation efforts, particularly increased lining in high-loss areas and improved maintenance in tail-end sections, could substantially improve system efficiency. These findings provide crucial data for irrigation planners and policymakers in Sri Lankan agriculture. © 2025 The Authors.

关键词： Infiltration

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Effective Municipal Wastewater Treatment at Low-Cost Using Coagulation/Precipitation Followed By Nano-Disinfection

Effective Municipal Wastewater Treatment at Low-Cost Using C...

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2021 AIChE Annual Meeting

作者： Mostafa, Mohamed K. Mahmoud, Ahmed S. Kamar, Mohamed T. Elshfai, Maha M. Moussa, M. Peters, Robert W. Cairo Egypt Egypt Environmental Engineering Program Zewail City of Science and Technology Giza Egypt Egypt Environmental Engineering Faculty of Engineering Mataria Helwan University Egypt Department of Civil Construction and Environmental Engineering University of Alabama at Birmingham BirminghamAL United States

ISBN: (纸本)9781713852834

Conventional wastewater treatment plants suffering from several industrial effluents overlap, trihalomethane (byproduct after free chlorine disinfection), and high construction cost. This study successfully prepared and compare a novel mixing of coagulants ferric/ferrous chloride (50:50) with other traditional individual coagulants such as ferric chloride, ferrous chloride, and aluminum chloride for domestic wastewater treatment. The results obtained indicated that the mixture of ferric/ferrous chloride is more efficient than other coagulants to meet the requirements of the Egyptian code for reuse of treated wastewater in different agricultural applications. Also, this study successfully replaced traditional chlorine addition by low-cost green synthesis of nano-Zero Valent Iron (GT-nZVI) for tertiary wastewater treatment. A continuous flow system was successfully built to achieve the treatment requirements in an economical and fast way. Finally, this study strongly supported using the proposed system rather than traditional wastewater treatment technologies in decentralized wastewater treatment units to overcome the combination of industrial effluents to the municipal wastewater networks and to reduce hazardous material produced after using traditional chlorine disinfectant. © 2021 American Institute of Chemical Engineers. All rights reserved.

关键词： Wastewater treatment

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Measurement analysis of the level of household preparedness for facing landslide in Bogor regency 2

Measurement analysis of the level of household preparedness ...

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2nd International Conference on Disaster and Management 2020, ICDM 2020

作者： Saputra, P.D. Rahmawati, C. Purnomo, K.S.H. Larosa, E. Nurhasanah Military Building Construction Engineering Study Program Faculty of Military Engineering Indonesia Defense University Bogor Indonesia Industrial Engineering Department Faculty of Industrial Technology Universitas Dirgantara Marsekal Suryadarma Jakarta Indonesia Master of Management Program Universitas Teknologi Yogyakarta Yogyakarta Indonesia Mechanical Engineering Education Faculty of Teacher Training and Education Universitas Negeri Yogyakarta Yogyakarta Indonesia Civil Engineering Study Program School of Engineering and Technology Tanri Abeng University Jakarta Indonesia

There are so many areas in Indonesia that are prone to landslides. Bogor is the regency with the most frequent landslides. Therefore, high community preparedness is needed to deal with the landslide, especially at the household level because it is the spearhead of preparedness and influence disaster risk. The objective of this research is to measure and analyze the level of household preparedness for facing landslide. The location of this research is in Cibadak Village, Bogor regency where a landslide disaster had happened. This is a quantitative research. The number of the samples were 100 household. Data collection was done by surveying samples and distributing questionnaires. The data would be analyzed with descriptive analysis, and the results of level of household preparedness would be categorized to five levels which were very prepared (80-100), prepared (65-79), almost prepared (55-64), less prepared (40-54), and not prepared (0-39). The results of the research are the average index value of Knowledge and Attitude (KA) parameter is 66.77, Emergency Planning (EP) parameter is 52.24, Warning System (WS) parameter is 64.80, Resources Mobilization Capacity (RMC) parameter is 51.25 and the level of household preparedness for facing landslide is 59.26 or and it is significant at the almost prepared level. © Published under licence by IOP Publishing Ltd.

关键词： Landslides

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