Influence of Glass Powder Incorporated Foamed Geopolymer Blocks on Thermal and Energy Analysis of Building Envelope

2021 ◽  
pp. 102520
Author(s):  
Ranjit J. Singh ◽  
Ashwin Raut ◽  
Anant Lal Murmu ◽  
Mohammed Jameel
Keyword(s):  
Glass Powder ◽  
Energy Analysis ◽  
Building Envelope

Sintering of a Crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 Glass with Titania Present

2002 ◽  
Vol 17 (7) ◽  
pp. 1772-1778 ◽  
Author(s):  
Jau-Ho Jean ◽  
Yu-Ching Fang ◽  
Steve X. Dai ◽  
David L. Wilcox
Keyword(s):  
Activation Energy ◽  
Reaction Kinetics ◽  
Crystalline Phase ◽  
Glass Powder ◽  
Energy Analysis ◽  
Dissolution Kinetics ◽  
Critical Value ◽  
Sio2 Glass ◽  
Kinetics Of Formation ◽  
Kinetics Of

Crystallization and reaction kinetics of a crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder with 17–40 vol% titania powder were investigated. The initially amorphous K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder formed cristobalite (SiO2) and pseudowollastonite [(Ca, Ba, Sr)SiO3] during firing. The above crystalline phases were completely replaced by a crystalline phase of titanite [(Ca, Sr, Ba)TiSiO5] when the amount of added titania was greater than a critical value, e.g., 10 vol%, at 99–1100 °C. A chemical reaction taking place at the interface between titania and the glass was attributed to the above observation. The dissolved titania changed the composition of the glass, and the dissolution kinetics was much faster than the formation of cristobalite and pseudowollastonite. Activation energy analysis showed that the crystallization of titanite [(Ca,Sr,Ba)TiSiO5] was controlled by a reaction-limiting kinetics of formation for the Ti–O bond.

scholarly journals Cost Benefit Energy Analysis of the Building Envelope Systems with Ener-Habitat

2014 ◽  
Vol 57 ◽  
pp. 1792-1797 ◽  
Author(s):  
Jose Manuel Ochoa ◽  
Irene Marincic ◽  
Maria Guadalupe Alpuche ◽  
Enrique Alejandro Duarte ◽  
Ileana Gonzalez ◽  
...  
Keyword(s):  
Energy Analysis ◽  
Cost Benefit ◽  
Building Envelope

scholarly journals Thermal Performance of Structural Lightweight Concrete Composites for Potential Energy Saving

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 461
Author(s):  
Yeong Huei Lee ◽  
Nicholas Chua ◽  
Mugahed Amran ◽  
Yee Yong Lee ◽  
Ahmad Beng Hong Kueh ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Thermal Properties ◽  
Thermal Performance ◽  
Energy Analysis ◽  
Lightweight Concrete ◽  
Time Lag ◽  
Building Envelope ◽  
Industrial Wastes ◽  
Conventional Concrete ◽  
Human Comfort

Residential consumption dominates the energy expenditure of heating and cooling systems, especially in tropical climates where building envelopes play an important role in energy efficiency. The thermal properties of concrete that are commonly employed as the building envelope material affect directly human comfort in a building. In addressing both the concrete thermal performance and industrial waste issues, this paper experimentally studies the concrete compressive strength and thermal properties used later for comparative energy analysis for human comfort. Four design mixes and a conventional concrete as control specimen are considered utilizing industrial wastes; palm oil fly ash (POFA), lightweight expanded clay aggregate (LECA), oil palm shell (OPS), and quarry dust, as constituents. These mixes are cast for cube compressive strength (to ensure the achievement of structural concrete requirement) and small-scaled wall tests. The measurement of surface temperatures of scaled wall tests is conducted in a polystyrene box to determine the concrete time lag and decrement factor. It is found that the density of concrete governs the compressive strength and that air pockets in the concrete matrix play an essential role as far as the thermal properties are concerned. From the energy analysis, structural lightweight concrete may save approximately 50% of the residential energy consumption.

scholarly journals Integrated Thermal-Energy Analysis of Innovative Translucent White Marble for Building Envelope Application

2014 ◽  
Vol 6 (8) ◽  
pp. 5439-5462 ◽  
Author(s):  
Federica Rosso ◽  
Anna Pisello ◽  
Franco Cotana ◽  
Marco Ferrero
Keyword(s):  
Thermal Energy ◽  
Energy Analysis ◽  
Building Envelope ◽  
White Marble

A General Method for Spectrometer Design in the Scoff Approximation

1976 ◽  
Vol 34 ◽  
pp. 538-539
Author(s):  
J. R. Fields
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Energy Analysis ◽  
Incident Beam ◽  
Scanning Transmission Electron Microscope ◽  
Chemical Identification ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
General Method

The energy analysis of electrons scattered by a specimen in a scanning transmission electron microscope can improve contrast as well as aid in chemical identification. In so far as energy analysis is useful, one would like to be able to design a spectrometer which is tailored to his particular needs. In our own case, we require a spectrometer which will accept a parallel incident beam and which will focus the electrons in both the median and perpendicular planes. In addition, since we intend to follow the spectrometer by a detector array rather than a single energy selecting slit, we need as great a dispersion as possible. Therefore, we would like to follow our spectrometer by a magnifying lens. Consequently, the line along which electrons of varying energy are dispersed must be normal to the direction of the central ray at the spectrometer exit.

EXELFS Studies of Carbon Fibers

1990 ◽  
Vol 48 (2) ◽  
pp. 72-73
Author(s):  
V. Serin ◽  
K. Hssein ◽  
G. Zanchi ◽  
J. Sévely
Keyword(s):  
Carbon Fibers ◽  
Energy Analysis ◽  
Electron Excitation ◽  
Complex Structures ◽  
High Modulus ◽  
Promising Technique ◽  
X Ray ◽  
Fine Structures ◽  
X Ray Absorption

The present developments of electron energy analysis in the microscopes by E.E.L.S. allow an accurate recording of the spectra and of their different complex structures associated with the inner shell electron excitation by the incident electrons (1). Among these structures, the Extended Energy Loss Fine Structures (EXELFS) are of particular interest. They are equivalent to the well known EXAFS oscillations in X-ray absorption spectroscopy. Due to the EELS characteristic, the Fourier analysis of EXELFS oscillations appears as a promising technique for the characterization of composite materials, the major constituents of which are low Z elements. Using EXELFS, we have developed a microstructural study of carbon fibers. This analysis concerns the carbon K edge, which appears in the spectra at 285 eV. The purpose of the paper is to compare the local short range order, determined by this way in the case of Courtauld HTS and P100 ex-polyacrylonitrile carbon fibers, which are high tensile strength (HTS) and high modulus (HM) fibers respectively.

Sign in / Sign up

Export Citation Format

Share Document