Stabilisation of pores in glass foam by using a modified curing-sintering process: sustainable recycling of automotive vehicles’ waste glass

In the world, waste glass is widely recycled, especially in developed countries with a recycling rate of about 30-90%. Currently, in Vietnam glass emissions in urban areas account for 1.5-2% of solid wastes; however, few studies mention this waste. Therefore, light weight concrete (LWC) using foam glass granulates (FGG) is the object of this paper. In the study, the raw materials are FGG, But Son PC40 cement, Pha Lai fly ash and Sikament superplasticizer named R4. The experimental results show that with FGG content of 50% (by volume), the LWC’s bulk specific gravity is 1302 kg/m3 and compressive strength at 28 days is 89 kG/cm2. Keywords: waste glass; foam glass granulate; light weight concrete.

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Physical Properties and Microstructures of Ceramics Fabricated from Mae Moh Lignite Bottom Ash

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.801.292 ◽

2019 ◽

Vol 801 ◽

pp. 292-297

Author(s):

Pat Sooksaen

Keyword(s):

Physical Properties ◽

Water Absorption ◽

Sintering Temperature ◽

Bottom Ash ◽

Waste Glass ◽

Particle Sizes ◽

Densification Behavior ◽

Sintering Process ◽

Main Component ◽

Mae Moh

Mae Moh lignite bottom ash was utilized as the main component in the fabrication of lightweight ceramic formulations. The amount of 50-80 wt.% bottom ash was successfully utilized to produce ceramics at sintering temperatures between 900 and 1200°C. Waste glass was used as a flux for the sintering process. Bottom ash was carefully sieved into three different particle sizes; small, medium and large. The different particle sizes were used in the ceramic fabrication to investigate for the densification behavior. Overall, porosity and water absorption of the fabricated ceramics decreased with increasing sintering temperature. Sintering at 1125°C resulted in the most densified ceramics which retained good physical appearance without sample distortion or melting.

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Microstructural Study of Diamond Deformed Under High Pressure and Temperature

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100118072 ◽

1985 ◽

Vol 43 ◽

pp. 230-231

Author(s):

E. F. Koch

Keyword(s):

High Pressure ◽

High Temperature ◽

Lattice Structure ◽

Diamond Particle ◽

Polycrystalline Diamond ◽

Sintering Process ◽

Ion Milling ◽

Sintered Compact ◽

Transmission Electron ◽

High Pressure Sintering

Because of the extremely rigid lattice structure of diamond, generating new dislocations or moving existing dislocations in diamond by applying mechanical stress at ambient temperature is very difficult. Analysis of portions of diamonds deformed under bending stress at elevated temperature has shown that diamond deforms plastically under suitable conditions and that its primary slip systems are on the ﹛111﹜ planes. Plastic deformation in diamond is more commonly observed during the high temperature - high pressure sintering process used to make diamond compacts. The pressure and temperature conditions in the sintering presses are sufficiently high that many diamond grains in the sintered compact show deformed microtructures.In this report commercially available polycrystalline diamond discs for rock cutting applications were analyzed to study the deformation substructures in the diamond grains using transmission electron microscopy. An individual diamond particle can be plastically deformed in a high pressure apparatus at high temperature, but it is nearly impossible to prepare such a particle for TEM observation, since any medium in which the diamond is mounted wears away faster than the diamond during ion milling and the diamond is lost.

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