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Use of alccofine-1203 in concrete: review on mechanical and durability properties alccofine-123在混凝土中的应用:力学和耐久性能综述
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-29 DOI: 10.1080/19397038.2021.1970275
B. Sagar, M. Sivakumar
ABSTRACT In the construction field, supplementary cementitious materials (SCMs) have brought about a technological revolution in the manufacturing of concrete as a partial replacement or addition to conventional binder mass. Keeping this in mind, this paper aims to summarise and discuss the reported findings on the mechanical and durability properties of alccofine-1203 based concretes. It is also aimed to give a better understanding of the behaviour and effect of alccofine-1203 as an SCM in various types of concretes. The alccofine-1203 has ultra-fine particles with a unique chemical composition that improves the hydration process and pozzolanic reaction. Therefore, its incorporation in concrete has resulted in good workability, reduction in segregation, reduction in heat of hydration, and reduction in permeability to concrete, and increased the rate of hydration process and improved the pozzolanic reaction to achieve high strength to concrete at the early curing stage. The presence of calcium (CaO) and silica (SiO2) in alccofine-1203 improved the mechanical and durability properties of concrete better than the other SCMs. From the literature review, the optimum dosage of alccofine-1203 is obtained between 8% to 12%, and at these percentages, the improvement in mechanical and durability properties of the concrete is highest.
摘要在建筑领域,作为对传统粘结料的部分替代或添加,补充胶凝材料(SCMs)在混凝土制造方面带来了一场技术革命。有鉴于此,本文旨在总结和讨论有关alccofine-123基混凝土力学和耐久性的研究结果。它还旨在更好地了解alccofine-203作为SCM在各种类型混凝土中的行为和效果。alccofine-203具有超细颗粒,具有独特的化学成分,可改善水化过程和火山灰反应。因此,将其掺入混凝土中,使其具有良好的和易性,减少了离析,降低了水化热,降低了混凝土的渗透性,并提高了水化过程的速率,改善了火山灰反应,从而在早期养护阶段实现了对混凝土的高强度。钙(CaO)和二氧化硅(SiO2)在alccofine-203中的存在比其他SCMs更好地改善了混凝土的力学和耐久性。根据文献综述,alccofine-203的最佳用量在8%-12%之间,在这些百分比下,混凝土的力学性能和耐久性的改善最高。
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引用次数: 10
Comparative life cycle assessment of refrigeration systems for food cooling: eco-design actions towards machines with natural refrigerants 食品冷却制冷系统的比较生命周期评估:采用天然制冷剂的机器的生态设计行动
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-29 DOI: 10.1080/19397038.2021.1970274
M. Rossi, C. Favi, M. Germani, Matteo Omicioli
ABSTRACT Refrigeration applications is responsible for approximately 17% of the total electricity and around 8% of greenhouse gas emissions. This study presents a comparative life cycle assessment between two refrigeration systems, the first operating with a traditional fluid and the second with a natural refrigerant. The analysis was performed in accordance with international standards ISO 14040/14044 and adopted the attributional life cycle assessment approach. The functional unit was: ‘the storage of meat products, at the temperature of 0°C for a lifetime of 10 years, in refrigerating cells of a medium city supermarket’. Three different scenarios were analysed to investigate the effect of the energy mix in relation to the use of the machines. Results highlight how the choice of the refrigerating fluid has a higher effect on the environmental performances of the machine with a reduction of approximately 10% in a whole life cycle. Scenario analysis shows how the use of such machines in different countries allows a significant reduction of environmental impacts mostly related to the use phase. Eco-design actions were listed and connected with environmental hot spots specifying the life cycle phases and the environmental indicators involved.
摘要制冷应用约占总电力的17%,温室气体排放量约占8%。这项研究对两种制冷系统的生命周期进行了比较评估,第一种使用传统流体运行,第二种使用天然制冷剂运行。根据国际标准ISO 14040/14044进行分析,并采用归因生命周期评估方法。功能单元是:“在中等城市超市的冷藏室中,在0°C的温度下储存肉制品,使用寿命为10年”。分析了三种不同的情景,以调查与机器使用相关的能源组合的影响。结果突出表明,制冷液的选择对机器的环境性能有更高的影响,在整个生命周期内可减少约10%。情景分析显示了在不同国家使用此类机器如何显著减少主要与使用阶段有关的环境影响。列出了生态设计行动,并将其与环境热点联系起来,具体说明了生命周期阶段和所涉及的环境指标。
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引用次数: 6
Efficient and sustainable treatment of industrial wastewater using a tannin-based polymer 使用单宁基聚合物高效、可持续地处理工业废水
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-26 DOI: 10.1080/19397038.2021.1972181
M. A. Aboulhassan, S. Harif, S. Souabi, A. Yaacoubi
Paint, tannery and textile manufacturing wastewaters contain highly toxic and organic biorefractory compounds and have adverse effects on human health. These effluents require efficient and environ...
油漆、制革厂和纺织制造业的废水含有剧毒和有机生物难降解化合物,对人类健康有不利影响。这些废水需要高效和环保的处理。
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引用次数: 3
Hydrogen production using solar energy resources for the South African transport sector 利用太阳能资源为南非运输部门生产氢气
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-26 DOI: 10.1080/19397038.2021.1970276
T. Ayodele, A. A. Yusuff, T. Mosetlhe, M. Ntombela
ABSTRACT This paper presents prospective of using solar energy resources to produce hydrogen for feeding hydrogen vehicles at a refuelling station in South Africa. Solar energy sources from Vredendal, located in the Western Cape Province of South Africa, were used for the study. Assessment was performed for a refuelling station having capacity to meet the hydrogen needs of 25, 50 and 100 number of vehicles per day. The results showed that the annual daily average solar irradiation on the horizontal surfaces and optimally tilted surfaces were 5.77 kWh/m2 and 5.933 kWh/m2, respectively. The solar power required to meet the hydrogen production demand for each of the three refuelling number of vehicles were determined to be 2.24, 4.24 and 8.95 MW, respectively. The cost of energy from the solar PV system as well as the cost of hydrogen production at the refuelling station for each of the three hydrogen vehicle capacities was calculated as (0.24, 0.239 and 0.237) $/kWh and (16.52, 15.95 and 15.67) $/kg, respectively. The PV system would displace 387, 774 and 1548 tons of coal per annum for each of the capacity, respectively. This will result in the avoidance of 780, 1560 and 3120 tons/yr of CO2, respectively.
本文介绍了利用太阳能资源生产氢气的前景,该氢气用于南非加油站的氢燃料汽车。研究使用了来自南非西开普省Vredendal的太阳能。对一个有能力满足每天25辆、50辆和100辆汽车氢气需求的加油站进行了评估。结果表明,水平表面和最佳倾斜表面的年平均日太阳辐射量分别为5.77kWh/m2和5.933kWh/m2。三辆加油车中每辆车的氢气生产需求所需的太阳能分别为2.24、4.24和8.95兆瓦。太阳能光伏系统的能源成本以及三种氢能汽车容量中每一种的加油站氢气生产成本分别计算为(0.24、0.239和0.237)美元/千瓦时和(16.52、15.95和15.67)美元每公斤。光伏系统每年将分别排放387774吨和1548吨煤炭。这将分别避免7801560和3120吨/年的二氧化碳排放。
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引用次数: 3
Consignment stock management for reducing waste items and GHG emissions using remanufacturing, emission penalties and promotional efforts under capacity constraints 寄售库存管理,以减少废物和温室气体排放,利用再制造,排放处罚和促进努力在能力限制
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-26 DOI: 10.1080/19397038.2021.1964632
B. Malleeswaran, R. Uthayakumar
ABSTRACT Most business organizations aim is to make as much profit as possible. In this consignment stock model, we discuss the reworking of waste items and reductions of greenhouse gases (GHGs). Here, we determine the GHGs and GHG penalty costs for each manufacturing and remanufacturing lot size. This proposed model is developed to reduce the manufacturer’s total cost per unit time without shortages. Also, we introduced a warehouse capacity constraint (CC) for minimizing the holding cost. For the promotional efforts, retailer promotional activity becomes prevalent in the business world, and here the promotional efforts dependent on demand. We exhibit the numerical instance by performing a sensitivity analysis of the model parameters and discussing specific managerial insights using optimization techniques.
摘要大多数商业组织的目标是尽可能多地盈利。在这个寄售库存模型中,我们讨论了废物的再加工和温室气体的减少。在这里,我们确定了每个制造和再制造批量的温室气体和温室气体惩罚成本。开发该模型是为了在不短缺的情况下降低制造商单位时间的总成本。此外,我们还引入了仓库容量约束(CC)来最小化持有成本。对于促销活动,零售商的促销活动在商业世界中变得普遍,而在这里,促销活动取决于需求。我们通过对模型参数进行敏感性分析,并使用优化技术讨论具体的管理见解,展示了数值实例。
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引用次数: 3
A decision framework for green manufacturing indicators using fuzzy AHP - ELECTRE I: a case study of the steering system manufacturer 运用模糊层次分析法的绿色制造指标决策框架——以转向系统制造商为例
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-23 DOI: 10.1080/19397038.2021.1970272
Vikrant Sharma, Vikram Sharma, Kritika Karwasra
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引用次数: 8
Natural fibre filament for Fused Deposition Modelling (FDM): a review 用于熔融沉积建模(FDM)的天然纤维长丝:综述
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-22 DOI: 10.1080/19397038.2021.1962426
H. Aida, R. Nadlene, M. Mastura, L. Yusriah, D. Sivakumar, R. A. Ilyas
ABSTRACT Fused Deposition Modelling (FDM) gets the most attention in development and manufacturing industries. The demand for FDM in industries increases gradually over time and attracts many researchers to enhance the quality of the FDM’s fillers. The most popular filler reinforcements in use are synthetic or carbon fibre. However, these fibres are harmful to the environment. To overcome the issue and replace the current fibres and achieve the bio-composites filler, researchers suggested using natural fibre to replace the synthetic and carbon fibres as the reinforcement, which is also combined with bio-polymer matrix such as thermoplastics as the polymer matrix in FDM’s industries. Many experiments and tests are conducted to prove the capability of the natural fibre as the main material in composite industries. FDM is a world-wide technology that aims to be environmentally friendly, thus, this paper focuses on biodegradable fillers for FDM.
摘要熔融沉积建模(FDM)在开发和制造行业中受到广泛关注。随着时间的推移,工业对FDM的需求逐渐增加,并吸引了许多研究人员来提高FDM填料的质量。最常用的填充增强材料是合成纤维或碳纤维。然而,这些纤维对环境有害。为了克服这一问题,取代现有的纤维,实现生物复合材料填充,研究人员建议使用天然纤维代替合成纤维和碳纤维作为增强材料,也可以与热塑性塑料等生物聚合物基体结合作为FDM工业中的聚合物基体。许多实验和测试证明了天然纤维作为复合材料工业主要材料的能力。FDM是一种以环境友好为目标的全球性技术,因此,本文主要研究生物可降解的FDM填料。
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引用次数: 29
Case study: plant design to obtain a diesel-like fuel from soybean oil cracking for decentralised energy generation to Brazilian isolated communities 案例研究:从大豆油裂解中获得类柴油燃料的工厂设计,用于向巴西偏远社区分散发电
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-20 DOI: 10.1080/19397038.2021.1966122
J. Rodrigues, P. A. Z. Suarez, G. Ghesti, O. Iha, I. B. Reis, R. R. Lavich
ABSTRACT Based on Brazilian isolated communities’ situation about absence energy distribution, mainly in the Amazon, northeastern semi-arid and isolated regions of the Savana, some alternatives should be developed to produce electric power for energy supply. Looking for the capacities and sources of these communities, the oilseed production capacity is the most promised. So, a easy to handle pilot plant for cracking oils and fats was developed to produce biofuels. This study aimed to analyse the mass and energy balances of the pilot plant to check its viability for sustainable energy supply. For this, three different cracking temperatures (663 K, 678 K and 693 K) were studied, and reaction data was collected. The physicochemical properties are similar to those of petroleum diesel, indicating that thermal cracking fuel may be a viable alternative to this fossil fuel in diesel cycle engines. The best temperature for the cracking reaction was 678 K, due to the physicochemical parameters of the biofuel produced being similar to those of fossil diesel. So, according to energy production system, the cracking temperatures 678 and 693 K are recommended.
摘要基于巴西偏远社区(主要分布在亚马逊、东北部半干旱和萨凡纳的偏远地区)缺乏能源分配的情况,应开发一些替代能源来生产电力供应。从这些社区的能力和来源来看,油籽生产能力是最有希望的。因此,开发了一种易于操作的裂解油脂的中试装置来生产生物燃料。本研究旨在分析试验工厂的质量和能量平衡,以检查其可持续能源供应的可行性。为此,研究了三种不同的裂化温度(663K、678K和693K),并收集了反应数据。物理化学性质与石油柴油相似,表明热裂解燃料可能是柴油循环发动机中这种化石燃料的可行替代品。裂解反应的最佳温度为678K,这是因为所生产的生物燃料的物理化学参数与化石柴油的物理化学指标相似。因此,根据能源生产系统,建议裂解温度为678和693K。
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引用次数: 1
An analysis of critical success factors towards sustainable supply chain management – in the context of an engine manufacturing industry 对可持续供应链管理的关键成功因素的分析-在发动机制造行业的背景下
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-18 DOI: 10.1080/19397038.2021.1966128
Nikkhil Pandey, Manas Bhatnagar, Dibyajyoti Ghosh
ABSTRACT Appropriate consideration and selection of practices, success factors are of utmost importance of the best use of resources, time and money to facilitate Sustainable Supply Chain Management (SSCM) development. This study presents an integrated framework based on Analytic Hierarchy Process (AHP) and Interpretive Structural Modelling (ISM) to evaluate potential alternatives for the SSCM. The criteria used for the selection of various enhancers of sustainability, which are developed along with the categories are environmental, economic, social, technical, organisational and business. An Indian-based engine manufacturing industry is taken to build up the model. AHP is employed to select the best criteria from the various Critical Success Factors (CSFs) listed under the categories based on the calculated weights. ISM and Matrice d’impacts croisés multiplication appliquée á un classment (MICMAC) analysis are employed to model the relationship among the various CSFs and to select the best from the developed matrix. The result indicates ‘support from senior management for environmental activities’, ‘environmental teamwork’ and ‘government support’ are the main CSFs for the achievement of sustainability of the supply chain.
摘要适当考虑和选择实践、成功因素对于最佳利用资源、时间和金钱促进可持续供应链管理(SSCM)的发展至关重要。本研究提出了一个基于层次分析法(AHP)和解释结构建模(ISM)的综合框架,以评估SSCM的潜在替代方案。选择各种可持续性增强剂的标准是环境、经济、社会、技术、组织和商业。以印度为基地的发动机制造业建立了这一模型。AHP用于根据计算的权重,从类别下列出的各种关键成功因素(CSF)中选择最佳标准。ISM和Matrice d’impacts croisés乘法应用分类(MICMAC)分析被用于对各种CSF之间的关系进行建模,并从所开发的矩阵中选择最佳的。结果表明,“高级管理层对环境活动的支持”、“环境团队合作”和“政府支持”是实现供应链可持续性的主要关键因素。
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引用次数: 6
Comparison of different concrete compositions based on sustainability score 基于可持续性评分的不同混凝土成分的比较
IF 3.7 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Pub Date : 2021-08-18 DOI: 10.1080/19397038.2021.1966123
Saurabh Shinkhede, Vasudha D. Katare, Saurabh N. Joglekar, M. Madurwar, S. Mandavgane
Researchers across the globe are developing different admixtures compositions to enhance sustainability of product. Fair sustainability assessment of these compositions still remains a major obstac...
全球各地的研究人员正在开发不同的外加剂成分,以提高产品的可持续性。对这些成分进行公平的可持续性评估仍然是一个主要障碍。。。
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引用次数: 1
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International Journal of Sustainable Engineering
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