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A review on strength characteristics of concrete incorporating sugarcane bagasse ash. 蔗渣灰混凝土强度特性研究进展。
Pub Date : 2021-03-29 DOI: 10.7770/safer-v10n1-art2496
S. Sangeetha, Fathima Shahin
Sugarcane bagasse ash is an offshoot of sugar factories found after burning of sugarcane bagasse which itself is found after the extraction of sugar from sugarcane. The disposal of this material causes environmental problems surrounding sugar factories. Sugarcane bagasse ash is rich in silica that can play the role of an effective pozzolana which leads to improve pozzolanic reactions resulting in better performing building materials. Light weight concrete can be prepared from low density bagasse ash. Surface reactions are improved due to its high specific surface area. Some percentage of cement is replaced with bagasse ash to determine the fresh and hardened properties of the concrete mix. Compressive strength of the concrete can be improved tremendously on later stages of addition of bagasse ash. Incorporating sugarcane bagasse ash in concrete can further alter the other various performance of concrete. Keywords—sugarcane bagasse ash, pozzolana, fresh and hardened properties.
甘蔗渣灰是糖厂在焚烧甘蔗渣后发现的一个分支,甘蔗渣本身是从甘蔗中提取糖后发现的。这种材料的处理导致了糖厂周围的环境问题。甘蔗渣富含二氧化硅,二氧化硅可以发挥有效的火山灰作用,从而改善火山灰反应,从而获得性能更好的建筑材料。轻质混凝土可以用低密度的蔗渣灰制备。由于其高比表面积,表面反应得到改善。用蔗渣灰代替一定比例的水泥,以确定混凝土混合物的新鲜和硬化特性。在掺加蔗渣灰的后期阶段,混凝土的抗压强度可以大大提高。在混凝土中掺入甘蔗渣灰可以进一步改变混凝土的其他各种性能。关键词——蔗渣灰,火山灰,新鲜和硬化性能。
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引用次数: 0
Emergency floating hut 应急浮舱
Pub Date : 2021-03-15 DOI: 10.7770/safer-v10n1-art2477
H. ShabidZaman, S. Anshad, E. T. Jenvit, P. Anusha
In the run-up to the observance of the repeating flooding situation in Kerala, it is an urgent need to take adequate measure for this havoc. This project intends a well planned solution for this and named as “Emergency Floating Hut”. Kerala is a place where floods occurs only during the monsoon season. That means, the flood is caused by rain. The hut is going to be constructed almost near the basement portion by separately providing beams or space in a creative way. The main feature of this design model is, there have spaces for keeping adequate food and medicines. The dimensional data for the hut are: diameter 3.5m and depth 1.2m for the prototype design. The materials used are weight less, low density, durable and with enough stability. The roof covering will be transparent fibre glass. Keywords—types, material collection, shape of model, principles, design, casting.
在喀拉拉邦反复发生洪水的前夕,迫切需要采取适当的措施来应对这场灾难。这个项目打算为这个问题提供一个精心策划的解决方案,并命名为“紧急浮动小屋”。喀拉拉邦是一个只在季风季节发生洪水的地方。也就是说,洪水是由降雨引起的。小屋将以一种创造性的方式单独提供梁或空间,几乎在地下室部分附近建造。这种设计模式的主要特点是,有足够的空间来保存食物和药品。小屋的尺寸数据为:原型设计直径3.5m,深度1.2m。所使用的材料重量轻,密度低,耐用,具有足够的稳定性。屋顶覆盖物将是透明的玻璃纤维。关键词:类型,材料收集,模型形状,原理,设计,铸造。
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引用次数: 0
Determining the optimum percentages of fly ash, metakaolin and copper slag by replacing cement and fine aggregate in m30 grade concrete 通过替代水泥和细骨料,确定了m30级混凝土中粉煤灰、偏高岭土和铜渣的最佳掺量
Pub Date : 2021-03-15 DOI: 10.7770/safer-v10n1-art2483
Stephen Isaac
The overall production of the cement has greatly increased which results lots of problems in environment as it involves the emission of CO2   gas.  Environmental concerns, stemming from the high energy expense and carbon dioxide emission associated with cement manufacture have brought about pressures to reduce cement consumption through the use of supplementary materials. Materials such as Metakaolin, fly ash have good pozzolanic activity and are a good material for the production of high strength concrete. Copper slag is a by-product of copper extraction by smelting. Copper slag can be used in concrete production as a partial replacement for sand. However, it is expected that the use of Metakaolin, Fly ash and Copper slag in concrete improves the strength properties of concrete. Keywords: Supplementary cementitious material, Cement, Fine aggregate
水泥的整体产量大大增加,但由于涉及到二氧化碳气体的排放,导致了许多环境问题。由于与水泥生产有关的高能源费用和二氧化碳排放,环境问题带来了通过使用补充材料来减少水泥消耗的压力。偏高岭土、粉煤灰等材料具有良好的火山灰活性,是生产高强混凝土的良好材料。铜渣是冶炼提铜的副产品。铜渣可部分替代砂子用于混凝土生产。在混凝土中掺入偏高岭土、粉煤灰和铜渣,可望提高混凝土的强度性能。关键词:补充胶凝材料,水泥,细骨料
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引用次数: 0
Analysis of cold formed steel sheet pile for earth retaining wall 挡土墙冷成型钢板桩分析
Pub Date : 2021-03-15 DOI: 10.7770/safer-v10n1-art2480
C. Veena, S. Saravanan, P. Davis, Nandakumar Gopalan
Failure loads of sheet pile having various profiles such as U, Z and Omega/Hat profiles under compression was carried out by using equations of strength of materials and compared the failure load under various modes such as Euler’s buckling, torsional buckling and failure load due to yielding. Compared the strength of various profiles under flexure by using finite element analysis. Sheet pile can be analyzed as a unit cell for the simplified finite element analysis. For selecting the unit cell sheet pile with omega/Hat section was analyzed for profile containing one to eight numbers and checked the convergence of bending stress and maximum lateral deflection. Interlocks were analyzed for three different conditions such as plane interlock, interlock filled with bitumen and welded interlock. Location of interlock and neutral axis of the wall will affect the stability of the structure. Sheet piles with various cross sections were analyzed and studied the shear stress and bending stress along the cross section. From the structural performance of various cross sections omega/hat section can be considered as the most efficient cross section for the cold formed steel sheet pile because of its more load carrying capacity under compression and high torsion resistance and less bending stress. Results from the finite element analysis for the selection of unit cell shows that the stress and deflection value was converge at the sheet pile having 6 numbers of profiles. Keywords: sheet piles, building, resistance.
采用材料强度方程对U、Z和Omega/Hat等不同剖面的板桩在压缩下的破坏载荷进行了计算,并比较了欧拉屈曲、扭转屈曲和屈服破坏载荷等不同模式下的破坏荷载。通过有限元分析比较了不同型材在弯曲条件下的强度。对于简化的有限元分析,可以将板桩作为一个单元进行分析。为了选择具有omega/Hat截面的单元板桩,分析了包含一到八个数字的剖面,并检查了弯曲应力和最大横向挠度的收敛性。对平面联锁、沥青填充联锁和焊接联锁三种不同条件下的联锁进行了分析。联锁和墙中性轴的位置将影响结构的稳定性。对不同截面的板桩进行了分析,研究了其截面上的剪切应力和弯曲应力。从各种截面的结构性能来看,Ω/hat截面可以被认为是冷成型钢板桩最有效的截面,因为它在压缩下具有更大的承载能力、更高的抗扭性和更小的弯曲应力。单元选择的有限元分析结果表明,应力和挠度值在具有6个剖面的板桩处收敛。关键词:板桩,建筑,阻力。
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引用次数: 0
Features of management agglomeration processes. 管理集聚过程的特征。
Pub Date : 2021-03-15 DOI: 10.7770/safer-v10n1-art2481
I. Pedko, A. Pandas
The agglomeration process is a complex socio- economic, spatial phenomenon that requires special approaches to management. Today, agglomerations are transforming the urban environment, creating a diverse set of problems, the solution of which requires the improvement of mechanisms and the creation of new tools for managing the development of agglomerations. The theoretical aspects of agglomeration formation are considered in the article. Attention is paid to the components of the process of modern development of urban agglomerations. Peculiarities of urban agglomerations allocation and basic models of agglomeration development management are considered. Particular attention is paid to the functioning and management of recreational agglomerations. Recreational agglomerations are a special type of agglomeration formations that have special features and require a specific management apparatus. The article allows to expand the idea of the essence of recreational agglomerations, serves as the first basis for further study of its structural and functional patterns of development. Keywords—urban, urban system, agglomeration, urban agglomeration, recreational agglomeration, innovation process
集聚过程是一种复杂的社会经济、空间现象,需要特殊的管理方法。今天,人口聚集正在改变城市环境,产生各种各样的问题,解决这些问题需要改进机制和创造管理人口聚集发展的新工具。本文从理论上探讨了聚块形成的机理。对城市群现代发展过程的构成要素进行了研究。分析了城市群配置的特殊性和城市群发展管理的基本模式。特别注意的是娱乐聚集区的功能和管理。休闲集聚是一种特殊类型的集聚形态,具有特殊的特征,需要特殊的管理手段。本文拓展了游憩集聚区本质的概念,为进一步研究其结构和功能发展模式奠定了基础。关键词:城市,城市体系,城市群,城市群,休闲集聚,创新过程
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引用次数: 0
Potential & challenges of national waterway 3. 国家水道的潜力和挑战3。
Pub Date : 2021-03-15 DOI: 10.7770/safer-v10n1-art2478
S.V. Shallen, Jibin Varghese
Kerala has a rich source of inland waterways, which can be used for the betterment of the state and country. One side of Kerala has a stretch of coastal line of the Arabian Sea and when it comes to the inland areas, the National Waterway 3 lies parallel to the Arabian Sea from Kollam to Kozhikode. This study deals with the actual potential of National waterway 3 which plays a prominent role in the commutation of goods and people. The inland waterways are the healthiest option in contrast to roads and railways, however it’s actual potential remains invisible for most people. The possibility of national waterway 3 is much higher if we deal with it in a better way. This study deals with the facilities, potential, relevance and challenges faced by the national waterway 3 and is presented from the information based on secondary data and information has been sourced from various books, trade journals, government publications newspapers and observations. Keywords— National waterway, Inland, Coastal
喀拉拉邦拥有丰富的内陆水道,可用于改善该邦和国家的状况。喀拉拉邦的一侧有一段阿拉伯海海岸线,当涉及到内陆地区时,国家3号水道从Kollam到Kozhikode与阿拉伯海平行。本研究涉及国家3号水道的实际潜力,该水道在货物和人员的运输中发挥着突出作用。与公路和铁路相比,内陆水道是最健康的选择,但它的实际潜力对大多数人来说仍然是看不见的。如果我们以更好的方式处理,国家水道3的可能性要高得多。本研究涉及国家水道3的设施、潜力、相关性和面临的挑战,并根据基于二级数据的信息进行介绍,信息来源于各种书籍、贸易期刊、政府出版物、报纸和观察结果。关键词——国家水道、内陆、沿海
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引用次数: 0
A review on GPR drone integrated system 探地雷达无人机集成系统研究进展
Pub Date : 2021-03-14 DOI: 10.7770/safer-v10n1-art2473
Aleena Nasar, Fahmitha Hameed, P. S. Sulthana, R. Xavier
Ground Penetrating Radar (GPR) is a widely used technology in many kinds of geological survey. It’s a geological method that uses radar pulse to image the surface. It is a non- intrusive method of surveying the subsurface to investigate underground utilities such as concrete, asphalt, metals, pipes, cable etc. To add onto these properties of GPR, here a drone and several sensors, which will make GPR surveys more efficient and accurate. The GPR is mounted over a drone (DJIM600 Pro) which will give more precision in work and exploring difficult areas. A GPR mounted on a drone enables to see the underground surface of ground without compromising safety and providing more efficient surveying. Also, it can be used for surveying in unreachable areas and make our job easier. In order to increase the application level of GPR drone integrated system several sensors such as pressure, thermal, humidity, snowfall, rain, gas, infrared sensors are also mounted. In short, GPR drone integrated system with sensors is the easiest and safe solution for geological surveys, archaeological surveys, weather forecasting etc. Keywords: GPR; geology, drone.
探地雷达(GPR)是一种广泛应用于多种地质调查的技术。这是一种利用雷达脉冲成像地表的地质方法。对混凝土、沥青、金属、管道、电缆等地下设施进行勘察是一种非侵入式的地下测量方法。为了增加探地雷达的这些特性,这里有一架无人机和几个传感器,这将使探地雷达调查更有效和准确。GPR安装在一架无人机(DJIM600 Pro)上,这将在工作和探索困难区域时提供更高的精度。安装在无人机上的探地雷达可以在不影响安全的情况下看到地面的地下表面,并提供更有效的测量。此外,它可以用于测量难以到达的地区,使我们的工作更容易。为了提高探地雷达无人机集成系统的应用水平,还安装了压力、热、湿度、降雪、降雨、气体、红外等传感器。总之,GPR无人机传感器集成系统是地质调查、考古调查、天气预报等最简单、最安全的解决方案。关键词:地质雷达;地质学、无人驾驶飞机。
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引用次数: 1
Scenario analysis of fluoride contamination in the groundwater in Kerala. 喀拉拉邦地下水中氟化物污染的情景分析。
Pub Date : 2021-03-14 DOI: 10.7770/safer-v10n1-art2475
S. Jeyalakshmi, S. Beegum
The Kerala State is a narrow strip of land in the southwest of India, with the Arabian Sea on the west and the Western Ghats in the east. Recent studies related to contaminant transport in the soil and groundwater in Kerala have reported Fluoride contamination in the aquifers. Due to the poor quality of the surface water sources in the state, the majority of the population in the state depends on groundwater resources for domestic and agricultural uses. When using groundwater for domestic purposes, it is highly important to analyze the quality of the groundwater. This study focuses on the analysis of the Fluoride transport in the soil and groundwater in two different lithological units (laterite and coastal alluvium) in the State. The study concluded that the aquifer in coastal alluvium formation is more susceptible to Fluoride contamination compared to the laterite formation. Keywords- Groundwater contamination, dispersion, diffusion, HYDRUS-1D
喀拉拉邦是印度西南部的一块狭长地带,西临阿拉伯海,东临西高止山脉。最近关于喀拉拉邦土壤和地下水中污染物迁移的研究报告了含水层中的氟化物污染。由于该州地表水资源质量差,该州大多数人口依赖地下水资源用于家庭和农业用途。在生活用水中,对地下水水质进行分析是十分重要的。本研究重点分析了我国两种不同岩性单元(红土和海岸冲积层)土壤和地下水中氟化物的运移规律。研究得出结论,沿海冲积层含水层比红土层更容易受到氟化物污染。关键词:地下水污染,扩散,扩散,HYDRUS-1D
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引用次数: 0
Material flow in construction sites – a case study 建筑工地的物料流动-个案研究
Pub Date : 2021-03-12 DOI: 10.7770/safer-v10n1-art2467
Sahimol Eldhose, S. Babu
The efficient movement of materials at sites in fair quantity at fair time without any interruption is called material flow. Operation and flow of these materials is a challenge experienced in sites today due to material scarcity, delivery delays, inadequate transportation facilities, loss and wastage, insufficient storage space etc. Data on material flows and inventory levels is intended to promote circular economy and resource efficiency in the construction sector. This paper presents a case study in Kerala, India with the purpose to quantify the flow of materials and stocks in the construction site. A questionnaire survey was conducted to find out the main factors that can affect the flow of materials in the building industry. Out of 65 respondents labour, equipment, material, time and cost are identified as the main factors which can contribute towards material flow. Based on the identified parameters, a material flow pathway is developed for the case study. It demonstrates the management of logistics and factors influencing the movement of materials on work sites. It therefore helps in the analysis of factors concerning the efficient use of materials in infrastructure projects. Keywords-material flow, logistics management, material scarcity, infrastructure projects.
在合理的时间、合理的数量、没有任何中断的情况下,材料在现场的有效流动被称为材料流动。由于材料短缺、交付延迟、运输设施不足、损失和浪费、储存空间不足等原因,这些材料的运营和流动是当今现场面临的挑战。有关材料流动和库存水平的数据旨在促进建筑行业的循环经济和资源效率。本文介绍了印度喀拉拉邦的一个案例研究,目的是量化建筑工地中材料和库存的流动。进行了一项问卷调查,以找出影响建筑行业材料流动的主要因素。在65名受访者中,劳动力、设备、材料、时间和成本被确定为有助于材料流动的主要因素。基于确定的参数,为案例研究开发了一个材料流动路径。它展示了物流管理以及影响工作现场材料流动的因素。因此,它有助于分析与基础设施项目中有效使用材料有关的因素。物流,物流管理,物资短缺,基础设施项目。
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引用次数: 0
Study on safety performance factors and sustainability in pipeline sleeper construction 管道轨枕施工安全性能因素及可持续性研究
Pub Date : 2021-03-12 DOI: 10.7770/safer-v10n1-art2462
Athira Anil, V. Jose
Construction industry is an important growth indicator because it generates investment opportunities across multiple related sectors. The construction task or work environment is very risky and hazardous and its susceptibility to accident. The major cause of the accident is the employees' poor safety performance in construction sites. These root causes of accidents and factors influencing them need to be studied in order to improve safety results. In pipeline sleeper construction, safety is a dynamic decision issue close to normal construction cases. The study identifies the critical risk factors affecting the safety performance and ways to achieve sustainability in pipeline sleeper construction to counteract the risk of accident occurrence. Based on the evaluation of the questionnaire survey, the study explains twelve most important factors and sub factors, which were rated to have more than a moderate effect on safety performance. The six keys to sustainable success for integrating worker protection in the assessment of sustainable construction is also discussed. Keywords-Hazards, pipeline sleeper, safety performance, risk
建筑业是一个重要的增长指标,因为它产生了多个相关行业的投资机会。施工任务或工作环境具有很大的危险性和危险性,易发生事故。事故的主要原因是施工现场员工的安全表现不佳。这些事故的根本原因和影响因素需要研究,以提高安全效果。在管道轨枕施工中,安全是一个接近于正常施工案例的动态决策问题。研究确定了影响管道轨枕安全性能的关键风险因素,以及如何实现管道轨枕施工的可持续性,以抵消事故发生的风险。在对问卷调查进行评价的基础上,本研究解释了12个最重要的因素和子因素,这些因素被评为对安全性能有中等以上的影响。本文还讨论了将工人保护纳入可持续建设评估的六个关键因素。关键词:危害;管道轨枕;安全性能
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引用次数: 0
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Sustainability Agri Food and Environmental Research
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