Delegates’ papers Improved thermal capacity of rammed earth by the inclusion of natural fibres

2015 ◽  
pp. 45-50
Keyword(s):  
Thermal Capacity ◽  
Natural Fibres ◽  
Rammed Earth

About definition of the local entropy rate of production in experiment of pulse electric heating

2020 ◽  
pp. 29-34
Author(s):  
Alexandr V. Kostanovskiy ◽  
Margarita E. Kostanovskaya
Keyword(s):  
Thermal Diffusivity ◽  
Electric Heating ◽  
Thermal Capacity ◽  
Entropy Rate ◽  
Initial Time ◽  
Local Entropy ◽  
Linear Mode ◽  
Electric Capacity ◽  
Definition Of ◽  
Pulse Electric

Work is devoted to studying of a linear mode thermodynamic – a mode which is actively investigated now. One of the main concepts of a linear mode – local entropy rate of production. The purpose of given article consists in expansion of a circle of problems for which it is possible to calculate a local entropy rate of production, namely its definition, using the experimental “time-temperature” curves of heating/cooling. “Time-temperature” curves heating or cooling are widely used in non-stationary thermophysical experiments at studying properties of substances and materials: phase transitions of the first and second sort, a thermal capacity, thermal diffusivity. The quantitative substantiation of the formula for calculation of the local entropy rate of production in which it is used thermogram (change of temperature from time) which is received by a method of pulse electric heating is resulted. Initial time dependences of electric capacity and temperature are measured on the sample of niobium in a microsecond range simultaneously. Conformity of two dependences of the local entropy rate of production from time is shown: one is calculated under the known formula in which the brought electric capacity is used; another is calculated, using the thermogram.

Dynamic Thermal Properties of Uninsulated Rammed Earth Envelopes

2015 ◽  
Vol 10 (1) ◽  
pp. 103-112
Author(s):  
Clayton Stone ◽  
Dusan Katunsky
Keyword(s):  
Thermal Properties ◽  
Rammed Earth

Dynamic thermal properties of uninsulated rammed earth envelopes

2015 ◽  
Vol 10 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Clayton Stone ◽  
Dusan Katunsky
Keyword(s):  
Thermal Properties ◽  
Rammed Earth

scholarly journals Failure maps of biocomposites mechanical joints reinforced with natural fibres

2021 ◽  
pp. 100159
Author(s):  
Rafael G. Estrada ◽  
Carlos Santiuste ◽  
Enrique Barbero
Keyword(s):  
Natural Fibres ◽  
Mechanical Joints

Evaluation of the heat changes in an ancient church because of restoration works: A microclimatic study supported by thermal images

2021 ◽  
pp. 1420326X2199462
Author(s):  
Stefano Ridolfi ◽  
Susanna Crescenzi ◽  
Fabiana Zeli ◽  
Stefano Perilli ◽  
Stefano Sfarra
Keyword(s):  
Methodological Approach ◽  
Thermal Capacity ◽  
Outdoor Environment ◽  
Heat Index ◽  
Heat Sources ◽  
Thermal Images ◽  
Roof Structure ◽  
Period 2 ◽  
Microclimate Monitoring ◽  
The Church

This work is centred on an ancient Italian church. Since 2011, a restoration plan has been undertaken by following sequential phases. The methodological approach to restoration was guided by environmental monitoring campaigns. In particular, two thermo-hygrometric campaigns were carried out during the warm months of the years 2015 and 2016. The first set of measurements was executed during the restoration of facades and roofs, making it possible to reach even areas that are usually difficult to access. The second set was performed to evaluate the indoor thermo-hygrometric conditions following the work of the previous year. This was intended to assess their differences in variability, the influence of the outdoor environment and any real and perceived improvement. Results demonstrate that thermal images helped in identifying both the heat sources causing thermal discomforts and the good thermal capacity of masonries. Concerning the heat index (HI), the church showed an improvement in the trend of malaise perceived by people during the second summer period (∼2°C lower than 2015). Finally, in the last microclimate monitoring, the roof structure no longer acted as an amplifier for daily temperature excursions.

Archaeological survey and excavation of the Mingtepa Site in Andijan Region, Uzbekistan

2019 ◽  
Vol 19 (1) ◽  
pp. 150-162
Keyword(s):  
Social Sciences ◽  
Inner City ◽  
Large Scale ◽  
Rammed Earth ◽  
Archaeological Survey ◽  
Ancient City ◽  
City Walls ◽  
Academy Of Sciences ◽  
Cultural Connotations

Abstract Since 2012, the Institute of Archaeology of Chinese Academy of Social Sciences and Institute of Archaeology of the Academy of Sciences of Uzbekistan organized joint archaeological team and conducted five terms of archaeological survey and excavation to the Mingtepa Ancient City Site in Uzbekistan. The excavation showed that the Mingtepa Ancient City Site is a large-scale city site with nested inner and outer cities; confirmed the coexistence relationships among the architectural sites with high rammed-earth platform foundations, city walls, gates, roads and handicraft workshop remains, which are the scientific evidences for the in-depth researches on the layout and cultural connotations of the inner city; the burials found on the east wall of the outer city provided rare data of the terminus ante quem of the abandoning of the outer city.

scholarly journals A Comprehensive Review on Advanced Sustainable Woven Natural Fibre Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 471
Author(s):  
H. A. Aisyah ◽  
M. T. Paridah ◽  
S. M. Sapuan ◽  
R. A. Ilyas ◽  
A. Khalina ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Polymeric Materials ◽  
Major Effect ◽  
Natural Fibre ◽  
Natural Fibres ◽  
Lignocellulosic Materials ◽  
Structural Composites ◽  
Detailed Review ◽  
Green Materials ◽  
Manufacturing Parameters

Over the last decade, the progressive application of natural fibres in polymer composites has had a major effect in alleviating environmental impacts. Recently, there is a growing interest in the development of green materials in a woven form by utilising natural fibres from lignocellulosic materials for many applications such as structural, non-structural composites, household utilities, automobile parts, aerospace components, flooring, and ballistic materials. Woven materials are one of the most promising materials for substituting or hybridising with synthetic polymeric materials in the production of natural fibre polymer composites (NFPCs). These woven materials are flexible, able to be tailored to the specific needs and have better mechanical properties due to their weaving structures. Seeing that the potential advantages of woven materials in the fabrication of NFPC, this paper presents a detailed review of studies related to woven materials. A variety of factors that influence the properties of the resultant woven NFRC such as yarn characteristics, fabric properties as well as manufacturing parameters were discussed. Past and current research efforts on the development of woven NFPCs from various polymer matrices including polypropylene, polylactic acid, epoxy and polyester and the properties of the resultant composites were also compiled. Last but not least, the applications, challenges, and prospects in the field also were highlighted.

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