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作者： Imteaz, Monzur Alam Altheeb, Naif Arulrajah, Arul Horpibulsuk, Suksun Ahsan, Amimul Department of Civil and Construction Engineering Swinburne University of Technology Hawthorn VIC Australia Center of Excellence in Innovation for Sustainable Infrastructure Development Suranaree University of Technology Nakhon Ratchasima Thailand Department of Civil Engineering University Putra Malaysia (UPM) Serdang Selangor Malaysia

Wood chips are generated from wood industries, particularly from furniture manufacturing. The general reuse options are, however, currently limited to low-value applications. Driven by the adverse impacts of climate change, with the aim of achieving more environmental sustainability through reducing waste and increasing reuse/recycle options, this study investigated the feasibility of using wood chips as a pipe backfilling and embankment fill material. A laboratory assessment undertaken in this research shows that wood chips are suitable as a non-structural embankment fill material, but not as a pipe backfilling material. This research also presents the environmental benefits of using wood chips in natural landscaping and the effects of filter depth in such applications. It is found that wood chips significantly trap total suspended solids (TSS) and total nitrogen (TN), contributing to increased total phosphorus (TP) concentration. As such the use of such material in urban landscaping should be subjective depending on the level of concerns for specific pollutant(s) (TSS, TN and TP). With regard to the effect of filter media depth on pollutants' removal efficiencies, it is found that the pollutants' removal efficiencies linearly vary with filter media depth.

关键词： Wood products

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Problems and benefits of using green roofs in Poland

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IOP Conference Series: Earth and Environmental Science 2019年第1期214卷

作者： W Drozd Tadeusz Kościuszko Cracow University of Technology Faculty of Civil Engineering Institute of Construction Management ul. Warszawska 24 31-553 Krakow Poland

Fashionable eco-friendly lifestyle increases the interest in green roofs. The subject of this article is to present problems as well as the benefits of using green roofs. The purpose of this article is to describe the advantages of using green roofs. The advantages are both ecological and what's very important today - also economic and aesthetic. In order to be objective, we also need to talk about the drawbacks of this type of construction investment. This study may be helpful in answering the question of whether it is worth following the new trend and using green roofs. The article makes it easier to consider all pros and cons.

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Eco-efficient concrete containing recycled ceramic wastes aggregate

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IOP Conference Series: Materials Science and engineering 2020年第1期849卷

作者： D M Peter A Z Awang A R M Sam C K Ma P Loo Construction Material Research Group (CMRG) School of Civil Engineering Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor Malaysia. Construction Research Centre (CRC) Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor Malaysia. Active Pozzolan Technology Sdn Bhd PLO 99 Jalan Nibong 2 Kompleks Perindustrian Tanjung Langsat 81700 Pasir Gudang Johor Malaysia.

The construction industry is in search of cleaner and greener alternatives for materials in concrete. The main objective of this study was to determine the properties of concrete using recycled ceramic waste aggregates (CWA). In this study, natural fine and coarse aggregates were partially substituted as ceramic waste aggregate in the range of 25%, 50% and 75%. Fifty-four cubes and twenty-one cylinders were prepared and tested to obtain the physical and mechanical properties of concrete. The compressive strength of concrete specimens containing 50% recycled ceramic fine aggregates (CFA) and 75% recycled ceramic coarse aggregates (CCA) is greater than the conventional concrete. However, the modulus of elasticity decreased with increased recycled aggregate content. The aggregates replacement decreases the concrete density but satisfying the desired compressive strength of concrete. The results made it possible to adopt ceramic tile waste as recycled aggregate materials to promote sustainable development in the production of concrete.

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Measures and Policy Suggestions for Improving Rural Settlements in Guangdong

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Journal of Landscape Research 2018年第3期10卷 43-49页

作者： ZHOU You ZHOU Jianyun HUANG Zuhuang College of Civil Engineering and Architecture Guangxi University Guangxi Key Laboratory of Disaster Prevention and Engineering Safety Guangxi University Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi University School of Architecture South China University of Technology Town Construction Office Department of Housing and Urban-Rural Development of Guangdong

Since 2000,Guangdong has continued to increase investment in infrastructure construction in rural areas,and indicators for the main construction in the rural areas have met the requirement of ***,the return visit has found that there are still huge gaps in urban and rural ***,this paper comprehensively investigated and scientifically analyzed existing problems in the rural settlements in Guangdong,and proposed that urbanization was the fundamental way to improve the rural settlements by carrying out the strategic planning of the provincial urbanization space and formulating different policies in urban areas and rural ***,in the urban areas,the municipal government could coordinate the urban-rural development,formulate a transformation and development plan for villages to be urbanized,and classify the villages into three types in accordance with the degree of influence of villages affected by the cities to set different planning *** the rural areas,the provincial government was responsible for rural protection and development together with the county government,and divided the villages into three types according to the regional planning goals to implement different supporting policies for them.

关键词： Rural area Human settlements Urban-rural development Policy suggestions

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Breeding control of the invasive alien fish Micropterus salmoides by stepped water level drawdown operation

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Ecology and civil engineering 2019年第2期21卷 145-158页

作者： Matsuzaki, Atsushi Okitsu, Jiro Azami, Kazuhiro Higuchi, Takaya Kamata, Kentaro Osugi, Tomonori Nakai, Katsuki Matsuda, Hiroyuki Oyama, Yukio Miharu Dam Management Office Tohoku Regional Construction Bureau Ministry of Land Infrastructure Transport and Tourism Japan 403-4 Aza Nakanouchi Ohaza Nishikata Miharu-machi Fukushima963-7722 Japan OYO Corporation Global Environment Business Division Ecology and Civil Engineering Institute 275 Aza Ishibatake Ohaza Nishikata Miharu-machi Fukushima963-7722 Japan OYO Corporation Global Environment Business Division Natural Environment Section 43 Miyukigaoka Tsukuba Ibaraki305-0841 Japan Water Resources Environment Technology Center 2-14-2 Kouji-machi Chiyoda-ku Tokyo102-0083 Japan Lake Biwa Museum 1091 Oroshimo-cho Kusatsu Shiga525-0001 Japan Yokohama National University 79-7 Tokiwadai Hodogaya-ku Yokohama Kanagawa240-8501 Japan Tohoku Regional Development Association Iwate Office 2-14-28 Takamatsu Morioka Iwate020-0114 Japan

The limited water-level method is used for the reservoir of the Miharu Dam, located in upstream of the Abukuma River, which flows into the Pacific Ocean, and drawdown of the water level is routinely practiced just before the flood season (June to October). At this time of the year, the surface water temperature of the reservoir reaches around 15°C at which spawning of largemouth bass, an invasive species, is thought to begin. Hence, the drawdown period coincides with the spawning period of largemouth bass. Several patterns of drawdown were performed in order to evaluate the effects of the drawdown on the spawning of largemouth bass. In an ordinary drawdown, the water level is lowered at a constant rate till the onset of the flood season. In the Miharu Dam reservoir, drawdown is temporarily paused for 2 to 4 days in the midst of drawdown to promote the spawning of largemouth bass. Then, drawdown is resumed to dry up the spawning beds established at the maintained water level. As a result, a considerable number of exposed spawning beds were detected by setting a few maintained periods during a drawdown, called "Stepped Water-level Drawdown", and exposed spawning beds were observed at depths of 0.5 to 2.0 m from the maintained water level. Fries of largemouth bass were captured and the dates of their spawning were estimated from the relationship between length and daily rings (otoliths) The analysis revealed that spawning during the drawdown period scarcely led to hatching. It was also found that 4-stepped drawdown is more effective for exposing spawning beds than 3-stepped drawdown. Population growth simulated by the Leslie matrix given a scenario of 4-stepped drawdown yielded a stable trend over 50 years. These analyses suggest that 4-stepped drawdown before the flood season could be an effective management method to control the recruitment of largemouth bass. © 2019 Ecology and civil engineering Society. All rights reserved.

关键词： Water levels

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Condition-based building maintenance strategy selection using constraint programming 34

Condition-based building maintenance strategy selection usin...

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34th International Symposium on Automation and Robotics in construction, ISARC 2017

作者： Liu, Shu-Shun Ramadhan, Gilang Department of Civil and Construction Engineering National Yunlin University of Science and Technology No 123 Section 3 University Road Douliu Yunlin640 Taiwan

Naturally, buildings will deteriorate during its life cycle. On the other hand, sustainability of building condition is the main objective of providing service for users. Therefore, building maintenance management should be a priority to achieve that objective. In Indonesia, there are many public buildings with different conditions and some of them are not in optimal conditions demanding urgent maintenance treatment. In addition, limited budget and absence of building maintenance decisionmaking tool are among factors causing unmanaged maintenance activities. Moreover, agencies must allocate maintenance budget and prioritize buildings maintenance manually. This paper proposes an optimization mathematical model which adopts Constraint Programming (CP) formulation to assist in selecting the most cost-effective strategy for particular building and determining budget allocation each year. CP is famous on its flexibility to problem declaration that makes scenario analysis conduct effectively. This CP-based model subjects to budget constraint and required condition level. In this case, budget, maintenance strategy options, building deterioration rate, time period, and minimum acceptable building condition are set. There are four maintenance strategy options available, Light Repair, Rehabilitation, Renovation, and Restoration which have different improvement impact for each strategy. Therefore, a case study is conducted to implement the model which involves 15 buildings in a 10-year time of period and two scenarios are presented in this proposed model. The result shows that the two scenarios allocate annual maintenance budget differently depending on diversities of planner management goals.

关键词： Cost effectiveness

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Study on Luminance in the Threshold Zone of Highway Tunnel

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IOP Conference Series: Materials Science and engineering 2020年第1期741卷

作者： Wenwei Chang Zihao Wang Bingyin Jing Fei Ma Yangcheng-Manghe Expressway Co. Ltd. of Shanxi Road & Bridge Construction Group Yangcheng Shanxi 030006 China College of Civil Engineering Chongqing Jiaotong University Chongqing 400074 China China Merchants Chongqing Communications Technology Research & Design Institute Co. Ltd. Chongqing 400067 China

Currently, highway tunnel development is on the upswing. As an important guarantee for traffic safety in highway tunnel, tunnel lighting has a short history of research. Since the 1960s when tunnel lighting began to become a subject of research, it was gradually and profoundly realized that lighting at the tunnel threshold zone was the focus of the entire tunnel lighting. This paper provides a review on past research into tunnel lighting and findings, and then introduces the latest theory and calculation methods regarding the luminance in the threshold zone of highway tunnel with a view to giving some valuable reference for engineering practice.

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Sustainable management and technologies for recycled construction demolition waste in Vietnam

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IOP Conference Series: Materials Science and engineering 2020年第3期869卷

作者： N H Giang N H Tan N T Quang N X Hien K Kawamoto Faculty of Building and Industrial Engineering National University of Civil Engineering 55 Giai Phong street Hanoi Vietnam. Vietnam Paper Corporation 25A Ly Thuong Kiet street Hanoi Vietnam. Department of Science Technology and Environment Ministry of Construction 37 Le Dai Hanh street Hanoi Vietnam. Saitama University 255 Shimookubo Sakura Ward Saitama 338-8570 Japan.

This study introduces the series of activities and results that are contributing for the CDW recycling industry in Vietnam especially for the implementation of the recently introduced Circular No.08/2017/TT-BXD. The equation for estimation of the amount of CDW generated from building demolition was introduced. New management regulations which are guideline for demolition, sorting, transportation and treatment and new Vietnamese standard for specification of testing and acceptance for CDW recycling materials are highlighted. The properties of recycling concrete from a pilot project were tested. The research designed a circle of recycling business that results from research are contributing for the sustainable management and technologies in Vietnam. These activities and contributions will significantly support for the implementation of Government's new regulation, reducing the solid waste to meet the National strategies for environment as well as open for a new important recycling industry in Vietnam.

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Measuring operator's situation awareness in smart operation of cranes 34

Measuring operator's situation awareness in smart operation ...

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34th International Symposium on Automation and Robotics in construction, ISARC 2017

作者： Fang, Yihai Cho, Yong K. Rinker School of Construction Management University of Florida GainesvilleFL United States School of Civil and Environmental Engineering Georgia Institute of Technology Georgia

Equipment operators play an integral role in the safe and efficiency operation of heavy equipment. They observe the environment, understand the situation, and make decisions and actions accordingly. Compared with other types of equipment, operating a crane is more sophisticated and mentally demanding, and thus crane operators are more vulnerable to human errors. Therefore, special considerations to mitigate operator errors should be taken when designing an operatorassistance system for construction cranes. With the goal of improving the operators' situation awareness (SA) of safety risks, this research presents a technical framework and practical system architecture for an operator-assistance system by leveraging real-time motion sensing and 3D modeling of dynamic workspaces. An approach for evaluating operators' SA was proposed to validate the effectiveness of the assistance system in actual lifting operations. Results in a series of field tests indicated that the prototype system improved the operators' SA which resulted in an improved lift performance.

关键词： Cranes

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Embodied GHG emissions of buildings – Critical reflection of benchmark comparison and in-depth analysis of drivers

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IOP Conference Series: Earth and Environmental Science 2020年第3期588卷

作者： Martin Röck Maria Balouktsi Marcella Ruschi Mendes Saade Freja Nygaard Rasmussen Endrit Hoxha Harpa Birgisdottir Rolf Frischknecht Guillaume Habert Alexander Passer Thomas Lützkendorf Working Group Sustainable Construction Institute of Technology and Testing of Construction Materials TU Graz Waagner-Biro-Straße 100/XI 8020 Graz Austria Centre for Real Estate Chair for Sustainable Management of Housing and Real Estate Karlsruhe Institute of Technology Kaiserstr. 12 76131 Karlsruhe Germany LIRIDE (Interdisciplinary Research Laboratory on Sustainable Engineering and Ecodesign) Department of Civil and Building Engineering University of Sherbrooke 2500 boul de l'Université Sherbrooke J1K 2R1 QC Canada Danish Building Research Institute Aalborg University A. C. Meyers Vaenge 15 2450 Copenhagen SW Denmark treeze Ltd. Kanzleistrasse 4 8610 Uster Switzerland Institute of Construction of Infrastructure Management Chair of Sustainable Construction ETH Zurich Switzerland

In the face of the unfolding climate crisis, the role and importance of reducing Greenhouse gas (GHG) emissions from the building sector is increasing. This study investigates the global trends of GHG emissions occurring across the life cycle of buildings by systematically compiling life cycle assessment (LCA) studies and analysing more than 650 building cases. Based on the data extracted from these LCA studies, the influence of features related to LCA methodology and building design is analysed. Results show that embodied GHG emissions, which mainly arise from manufacturing and processing of building materials, are dominating life cycle emissions of new, advanced buildings. Analysis of GHG emissions at the time of occurrence, shows the upfront 'carbon spike' and emphasises the need to address and reduce the GHG 'investment' for new buildings. Comparing the results with existing life cycle-related benchmarks, we find only a small number of cases meeting the benchmark. Critically reflecting on the benchmark comparison, an in-depth analysis reveals different reasons for cases achieving the benchmark. While one would expect that different building design strategies and material choices lead to high or low embodied GHG emissions, the results mainly correlate with decisions related to LCA methodology, i.e. the scope of the assessments. The results emphasize the strong need for transparency in the reporting of LCA studies as well as need for consistency when applying environmental benchmarks. Furthermore, the paper opens up the discussion on the potential of utilizing big data and machine learning for analysis and prediction of environmental performance of buildings.

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