Papers – Page 15 – TechConnect Briefs

Molecular Modeling of Low-Emissivity Materials

Schweizer S., Low J.J., Subramanian L., Scienomics, US

Reducing heat transfer through thermal radiation is of main importance for energy efficient building. The emissivity of a material plays a central role in this context. Using low-emissivity (low-e) building materials is a very efficient [...]

Nanostructured Calcium Silicate Phase Change Materials for Thermal Buffering in Packaging and Construction Applications

Johnston J.H., Victoria University of Wellington, NZ

This paper presents the formation and use of a novel composite nanostructured calcium silicate phase change material with significant thermal buffering capacity for use in thermally responsive packaging and construction materials. Phase change materials (PCMs) [...]

Concrete crack-healing materials using biocalcification by ureolytic bacteria isolated in marine environment: An overview

Kim H-Y, Son H.M., Lee H.K., Korea Advanced Institute of Science and Technology, KR

Micro-cracks on the surface of concrete structures frequently occur due to external force and shrinkage [1]. The deterioration of concrete durability is accelerated by the penetration of moisture and chemicals into microcracks and pores [2]. [...]

Carbon Nanotube Fiber-Based Tensegrity Structures

Zajac D., University of California-Berkeley, US

Tensegrity structures characterized by self-equilibrium and super-stability are space structures, which due to their properties are of interest to architects and civil engineers. This paper reviews the possible usage of carbon nanotube (CNT) fibers as [...]

Rapid compressive strength achievement of coal bottom ash based geopolymer by employing microwave energy

Kim H., Hong S., University of Seoul, KR

Geopolymer has been introduced as a green alternative to Portland cement to reduce CO2 from cement industry. Unlike coal fly ash, coal bottom ash has not been used widely as a source material for geopolymer [...]

Effect of elevated hot temperatures on hybrid geopolymer synthesized with coal fly and bottom ashes

Kim H., Park C.W., University of Seoul, KR

Ordinary Portland Cement (OPC) concrete has been most widely used for construction materials although the strength deterioration of OPC concrete in high temperature has been pointed out as its inherent flaw. Considering that fire is [...]

Recycling of Graphite Waste into High Quality Graphene Products

Ahmed T.M., Rahman M.M., Asmatulu E., Wichita State University, US

Graphite is a stack of carbon layers where carbon atoms form hexagons in a honeycomb structure. Graphene on the other hand is a single atom thick layer which offers unique physical, chemical and biological properties [...]

Characterization of durability and photocatalytic properties of TiO2 cement-based materials

Luongo N., Massari S., Spagnolo S.L., Diamanti M.V., Daniotti B., Pedeferri M.P., Politecnico di Milano, IT

The issue of maintenance is steadily emerging in the framework of the built environment, with a specific focus on durability and service life planning and sustainability evaluations, as the definition of a maintenance plan for [...]

Nano-layer and micro-structure technologies for energy efficiency and sustainability

Hebrink T.J., 3M Company, US

Multilayer optical film technologies made with hundreds of nanolayers and microstructured film technologies can be used to manage building energy while maintaining architectural aesthetics. For example, visibly transparent (invisible) infrared mirror films are useful for [...]

Development and Investigation of New Materials and Technologies for Utilization in Zero Emission Buildings

Jelle B.P., Gao T., Ng S., Norwegian University of Science and Technology (NTNU) / SINTEF Building and Infrastructure, NO

The demand for zero emission buildings (ZEB) and energy-producing buildings is increasing along with the growing focus on material resource abundance and scarcity, energy efficiency, renewable and non-polluting energy sources and carriers, and environmental impact. [...]