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Effect of Nano Solid Lubricant in Automotive Brake Lining 纳米固体润滑剂在汽车制动衬里中的作用
Pub Date : 2019-01-01 DOI: 10.33545/26648776.2019.v1.i1a.5
Ä°lker Sugozu
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引用次数: 0
Design of a novel testable reversible Alu in QCA technology for high-performance nanocomputing 高性能纳米计算QCA技术中可测试可逆Alu的设计
Pub Date : 2019-01-01 DOI: 10.33545/26648776.2019.v1.i1a.2
Maliheh Norouzi, Maryam Shaveisi, A. Rezaei
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引用次数: 0
Effect or impact of artificial intelligence (AI) 人工智能(AI)的影响
Pub Date : 2019-01-01 DOI: 10.33545/26648776.2019.v1.i1a.1
Ankit Kene, Shahjadi Sheikh, Harshitita Kothari, Ankita Chhalani
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引用次数: 0
COMPARISON OF TEMPERATURE RISE PREDICTION METHODS WITH MEASURED TEMPERATURES DUE TO HYDRATION OF CEMENTITIOUS MATERIALS IN CONCRETE 混凝土中胶凝材料水化引起的温升预测方法与实测温度的比较
Pub Date : 2018-12-31 DOI: 10.15623/ijret.2018.0713001
K. ., J. ., Kunwar Sushil Kumar ., Devendra Ramtekkar .
The paper deals with the experimental study which was carried out to investigate the temperature rise characteristics of the concrete used in a prototype component of foundation for Interchange station of Nagpur Metro Rail Project, Nagpur, Maharashtra State. The actual temperature rise was measured by embedding Thermo Couples – Resistance temperature detector (RTD) in the prototype structure during concreting. The measurements were taken at 5 locations in the component – a pile cap by inserting thermo couples (TC’s) in 3 layers at each location totaling to 15 in all. The monitoring of temperature recorded by thermocouples was done by digital recorder manually on hourly basis up to 13 days and then once in 3 hrs. up to next 21 days and beyond but restricted to 14 days in this reporting. The temperature at the time of insertion i.e. initial/starting temperature was noted and maximum temperature reached, the time to reach peak temperatures was recorded. The plot of time-temperature demonstrated the actual temperature rise, its trend both increasing and decreasing wherein all the thermal effects in and on the concrete such as effects of exothermic reaction of hydration of cement, conduction, convection and thermal properties of concrete such as specific heat, thermal conductivity, diffusivity and so also the external factors such as ambient temperature, humidity, wind speed, solar radiation, curing and form removal have played their role and the resultant was the actual temperature reached at that point where the measurements have been recorded by embedded TC’s. The comparison of the actual measured temperatures made with the various methods available to predict maximum concrete temperatures by empirical formulas such as PCA method, adiabatic temperature rise curves as published in ACI committee reports and ASCE method showed that the actual measured temperatures vary on plus as well as minus side over predicted.
本文对印度马哈拉施特拉邦那格浦尔地铁换乘站基础原型构件混凝土的温升特性进行了试验研究。通过在原型结构中嵌入热电偶-电阻温度探测器(RTD),在混凝土过程中测量实际温升。测量是在组件的5个位置进行的-通过在每个位置插入热电偶(TC)的3层,总共有15层。热电偶记录的温度监测由数字记录仪手动完成,每小时监测13天,然后每3小时监测一次。在接下来的21天及以后,但在本报告中限于14天。记录插入时的温度,即初始/启动温度和达到的最高温度,记录达到峰值温度的时间。时间-温度曲线显示了实际温度的上升和下降趋势,其中混凝土内部和表面的所有热效应,如水泥水化的放热反应、传导、对流和混凝土的热性能如比热、导热系数、扩散系数等的影响,以及外界因素如环境温度、湿度、风速、太阳辐射等。固化和脱模都发挥了各自的作用,结果是在嵌入的TC记录测量值时达到的实际温度。实测温度与现有的各种经验公式预测混凝土最高温度的方法(如PCA法、ACI委员会报告的绝热温升曲线和ASCE方法)的比较表明,实测温度与预测值的正、负均有差异。
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引用次数: 0
EXPERIMENTAL STUDY ON AASC USING PS BALL AS FINE AGGREGATE AT THE HIGHER CONCENTRATION OF SODIUM SILICATE 高水玻璃浓度下以ps球为细集料的aasc试验研究
Pub Date : 2018-12-31 DOI: 10.15623/ijret.2018.0713003
A. ., A. .
The second largest production of cement is India with 455 Million Tonnes (MT) annually, by 2020 it may reach up to 550MT. In India, the increased demand for construction industry required to meet the needs for infrastructure development. However, the production of Portland cement, releases the significant amounts of CO2to the atmosphere. Therefore, it is necessary to look for sustainable solutions for future concrete construction as next generation construction materials, by the use of the Secondary Cement Replacement Material (SCRM). The alternative replacement for Ordinary Portland Cement (OPC) can be Ground Granulated Blast Furnace Slag (GGBS), Fly-ash, Silica fume, Rice-husk ash, which are the various industrial by-products.In this present work, an attempt was made to develop Alkali Activated Slag Concrete (AASC) using Precious Slag (PS) ball as fine aggregate. The development of AASC was made with GGBS as the principal binder. Mixes were developed with binder content 443 kg/m, Na2SiO3/ NaOH ratio (1,1.5,2 and 2.5) and their performance when exposed to ambient temperature were studied. Alkali binder ratio (0.3) and Molarity of 8M was kept constant for all the AASC mixes. The test results showed that the slump values for the different mixes developed herein to be greater than 25mm with conventional slump cone satisfying the MoRTH guidelines for concrete pavements. Results showed that all AASC mixes have higher 28day compressive strength of the order 2458 MPa. The fatigue life of AASC mixes has improved by the addition of PS ball, at the higher concentration of sodium silicate, indicating better performance of AASC mixes.
第二大水泥生产国是印度,每年生产4.55亿吨,到2020年可能达到5.5亿吨。在印度,建筑行业的需求增加,需要满足基础设施发展的需要。然而,波特兰水泥的生产向大气中释放了大量的二氧化碳。因此,有必要通过使用二次水泥替代材料(SCRM),为未来的混凝土建筑寻找可持续的解决方案。各种工业副产品矿渣粉、粉煤灰、硅灰、稻壳灰是普通硅酸盐水泥(OPC)的替代品。本文尝试以贵重矿渣球为细骨料研制碱活化矿渣混凝土(AASC)。以GGBS为主要粘结剂研制AASC。配制了粘结剂含量为443 kg/m、Na2SiO3/ NaOH比分别为1、1.5、2和2.5的混合料,并研究了其在室温下的性能。所有AASC混合料均保持碱胶比(0.3)和8M摩尔浓度不变。试验结果表明,不同掺合料的坍落度值均大于25mm,而常规坍落度锥满足north混凝土路面准则。结果表明,所有AASC混合料均具有较高的28d抗压强度,约为2458 MPa。在水玻璃浓度较高的情况下,添加PS球提高了AASC混合料的疲劳寿命,表明AASC混合料的性能较好。
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引用次数: 1
A CASE STUDY ON MEASUREMENT OF TEMPERATURE RISE IN CONCRETE AND ASSESSMENT OF PROBABILITY OF CRACKING DUE TO HEAT OF HYDRATION 混凝土温升测量与水化热开裂概率评估的实例研究
Pub Date : 2018-12-31 DOI: 10.15623/ijret.2018.0713002
K. ., Sandip Sonule ., Kunwar Sushil Kumar ., M. -
Experimental study was carried out to investigate the temperature rise characteristics of the concrete used in a prototype component of foundation for Interchange station of Nagpur Metro Rail Project, Nagpur, Maharashtra State. The actual temperature rise was measured by embedding Thermo Couples – Resistance temperature detector (RTD) in the prototype structure during concreting. The measurements were taken at 5 locations in the component – a pile cap by inserting 3 thermo couples (TC’s) at each location totaling to 15 in all. The monitoring of temperature recorded by thermocouples was done by digital recorder manually on hourly basis up to 13 days and then once in 3 hrs. up to next 21 days and beyond but restricted to 14 days in this reporting. The temperature at the time of insertion i.e. initial/starting temperature was noted and maximum temperature reached, the time to reach peak temperatures was recorded. The plot of time-temperature demonstrated the actual temperature rise, its trend both increasing and decreasing. The derived temperature rise equations with strong correlation coefficient “r” values could be used to predict the early age temperature rise in structures with similar geometry, concrete, weather conditions, curing and form removal. Another purpose of this study is to know the probability of cracking based on the existing cracking assessment based on Korean methods as Indian specifications are non-existent and also to find the crack index for internally restraint cases based on temperature difference, both the elastic; hypoelastic models. The study indicated that the existing provisions based on crack index appear to be very conservative which tend to overestimate the probability of crack occurrence compared with construction observations on prototype structures.
对印度马哈拉施特拉邦那格浦尔地铁换乘站基础原型构件混凝土的温升特性进行了试验研究。通过在原型结构中嵌入热电偶-电阻温度探测器(RTD),在混凝土过程中测量实际温升。测量是在组件的5个位置进行的-通过在每个位置插入3个热电偶(TC),总共15个。热电偶记录的温度监测由数字记录仪手动完成,每小时监测13天,然后每3小时监测一次。在接下来的21天及以后,但在本报告中限于14天。记录插入时的温度,即初始/启动温度和达到的最高温度,记录达到峰值温度的时间。时间-温度变化图显示了实际温度的上升趋势和下降趋势。推导出的温升方程具有较强的相关系数“r”值,可用于预测具有相似几何形状、混凝土、气候条件、养护和变形条件的结构的早期温升。本研究的另一个目的是了解现有的基于韩国方法的裂缝评估的开裂概率,因为印度规范不存在,并找到基于温差的内约束情况下的裂缝指数,弹性;次弹性模型。研究表明,现有的基于裂缝指数的规定与原型结构的施工观测结果相比,显得过于保守,容易高估裂缝发生的概率。
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引用次数: 0
INFLUENCE OF GROUND GRANULATED BLAST FURNACE SLAG ON PROPERTIES OF CONCRETE PAEMENT 粉状高炉矿渣对混凝土路面性能的影响
Pub Date : 2018-12-31 DOI: 10.15623/ijret.2018.0713004
Binod Kumar ., L. ., L. .
The influence of using Ground Granulated Blast Furnace Slag (GGBFS) on various properties of Pavement Quality Concrete (PQC) and performance of concrete pavement has been brought out. The amount of GGBFS in PQC mixes was varied from 10 to 60 percent. Workability, compressive strength, flexural strength, abrasion resistance and drying shrinkage of concrete containing GGBFS were evaluated. Significant improvement was observed in strength, abrasion and shrinkage parameters of concrete. The paper concludes that an economical as well as better performing concrete pavement can be constructed by the use of GGBFS in PQC.
研究了高炉磨粒渣对路面质量混凝土(PQC)各项性能及混凝土路面性能的影响。PQC混合物中GGBFS的含量从10%到60%不等。对含GGBFS混凝土的和易性、抗压强度、抗弯强度、耐磨性和干收缩率进行了评价。混凝土的强度、磨损和收缩参数均有显著改善。本文认为,在PQC中使用GGBFS可以构建经济且性能较好的混凝土路面。
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引用次数: 1
AN EXPERIMENTAL STUDY TO INVESTIGATE THE RHEOLOGICAL PROPERTIES OF FRESH SCC USING NEW CONCRETE SHEAR BOX 采用新型混凝土剪力箱对新鲜SCC流变特性进行了试验研究
Pub Date : 2018-12-31 DOI: 10.15623/ijret.2018.0713005
G. S, A. N, Ashwin. M. Joshi, Namratha Bharadwaj
Flow characterization and controlling fresh property of SCC is most critical. Even slight variations in ingredients can have adverse effect on fresh properties; strength and durability of hardened concrete. The material science approach to study rheological properties is essential in order to overcome the paucity posed while characterizing mixes by empirical methods such as the slump flow test. In the present the Bingham parameters of SCC were assessed by using the new concrete shear box. The mixes were designed considering volume of paste based on absolute volume concept. Three different volumes of pastes (0.38, 0.40 and 0.42) with water contents of 170 and 190 lt/m 3 and cement contents of 300 and 450 kg/m 3 along with slag as filler was used. A unique test procedure was followed, by applying low normal stresses of 0.10, 0.20 and 0.30 MPa with three different displacement rates of 1, 5 and 15mm/min under static condition. The results indicate that the new concrete shear box shall effectively put to use, as an additional tool for evaluating the rheological properties of SCC viz., yield stress and plastic viscosity.
SCC的流动特性和新鲜特性的控制是最关键的。即使成分的微小变化也会对新鲜特性产生不利影响;硬化混凝土的强度和耐久性。研究流变特性的材料科学方法是必不可少的,以克服缺乏,而由经验方法表征混合物,如坍落度流动试验。本文采用新型混凝土剪力箱对SCC的Bingham参数进行了评定。根据绝对体积的概念,考虑膏体的体积来设计混合料。采用三种不同体积的膏体(0.38、0.40和0.42),水含量分别为170和190 lt/ m3,水泥含量分别为300和450 kg/ m3,并用矿渣作为填料。采用独特的测试程序,在静态条件下施加0.10、0.20和0.30 MPa的低法向应力,并施加1、5和15mm/min三种不同的排量。结果表明,新型混凝土剪力箱作为评价混凝土混凝土流变特性(屈服应力和塑性粘度)的附加工具,应有效地投入使用。
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引用次数: 3
SYNTHESIS AND CHARACTERIZATION OF LIFEPO4 BY FLAME SPRAY PYROLYSIS – A LI-ION BATTERY CATHODE MATERIAL 火焰喷雾热解法制备锂离子电池正极材料lifepo4及表征
Pub Date : 2018-12-25 DOI: 10.15623/ijret.2018.0712002
Mallika Rani Parimi .
Flame Spray Pyrolysis is a method used in the synthesis of LiFePO4 with subsequent heat treatment in tubular furnace for Li-ion battery application as cathode material. The crystal structure, morphology of LiFePO4 synthesized by Flame Spray Pyrolysis was studied by X-ray diffraction (XRD) and Field emission scanning electron microscopy (FESEM). From the Debye-Scherer equation, LiFePO4 particles obtained by this method are pure, homogeneous and well-crystallized with size ranging from of 25 – 60nm. FESEM data reveal that the particles are in spherical morphology with primary particle size ranging from 15-75nm.
火焰喷雾热解是一种在管状炉中合成LiFePO4并进行热处理的方法,用于锂离子电池正极材料。采用x射线衍射仪(XRD)和场发射扫描电镜(FESEM)研究了火焰喷雾热解法制备的LiFePO4的晶体结构和形貌。根据Debye-Scherer方程,该方法获得的LiFePO4颗粒纯度高、均匀且结晶良好,粒径范围为25 ~ 60nm。FESEM数据显示,颗粒呈球形,初始粒径在15 ~ 75nm之间。
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引用次数: 1
EVALUATION ON PERFORMANCE AND EXHAUST EMISSIONS WITH BIO-DIESEL AND ETHANOL BLENDING ON A DIESEL ENGINE 生物柴油与乙醇混合使用柴油机的性能及废气排放评估
Pub Date : 2018-12-25 DOI: 10.15623/ijret.2018.0712005
K. .
Due to Urbanized the demand of world energy raises, the 90 percentage of demand is equalized by the fossil fuels and the fossil fuels causes huge measure of carbon rate it causes much more pollution in the atmosphere, this influenced the researcher to hunt an alternative fuel that is friendly to the atmosphere, and it should be Renewable, non-flammable, biodegradable, and non-toxic, by this condition choosing of bio- diesel is the suitable solution for the future. Last few years more number of countries concentrate in the alternate energy source, in that bio- fuel play a virtual role. In this research, Via Transesterification techniques Jatrophacurcas oil and CI oil have been Manufactured and the Properties of the Manufactured biodiesels have been compared with the BIS standard: biodiesel well-known and trying out techniques. The important fuel properties are investigated through lab test resulted in the limits.it shows both are eligible to use as an Bio-fuel in diesel engines. The diesel engine both oil are injected and run the engine. By this emission parameters are evaluated. With various Brake power. Bio- diesel and diesel are compared. Biodiesel–diesel blends. 20% Jatropha and of 30% of Calophyllum Inophyllum biodiesel-diesel blends shows low emission.
由于城市化对世界能源的需求增加,90%的需求是由化石燃料平衡的,化石燃料造成了巨大的碳率,它在大气中造成了更多的污染,这影响了研究人员寻找一种对大气友好的替代燃料,它应该是可再生的,不易燃的,可生物降解的,无毒的,在这种情况下选择生物柴油是未来合适的解决方案。近年来,越来越多的国家集中精力发展替代能源,其中生物燃料发挥了实际作用。本研究通过酯交换法制备麻疯树油和麻疯树油,并将所制生物柴油的性能与BIS标准生物柴油进行了比较。通过实验室试验研究了重要的燃料性能,得出了极限。这表明两者都有资格作为柴油发动机的生物燃料。柴油发动机既注入机油又运转发动机。以此来评估发射参数。具有各种制动功率。对生物柴油和普通柴油进行了比较。Biodiesel-diesel混合。20%的麻疯树和30%的茶树生物柴油-柴油混合排放低。
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引用次数: 0
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International Journal of Research in Engineering and Technology
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