Publicaties

During the past decades, a significant progress has been made in the development of concrete materials. With the development of high performance and self-compacting concrete, the design of concrete structures for hundred-year service life becomes possible. In recent years, concrete has been considered as a useful material for facilities with extremely long-term service life such as radioactive waste repositories. Therefore, the assessment of the ...

This paper studies the alkali activation of iron-rich aluminosilicates (laterites). Three activating alkaline solutions were prepared from sodium hydroxide solution (8, 10 and 12 M) with sodium silicate (Na2SiO3) in order to obtain the sodium silicate solutions with moduli of SiO2/Na2O equal to 0.75, 0.92 and 1.04; H2O/Na2O=9.78, 10.45 and 12.04. The effects of above defined solutions on the setting time, physical and microstructural properties ...

Bitumen characterisation and differentiation usually involve a combination of mechanical and chemical analyses. However, these methods provide limited information on the diversity caused by the binders' origin or processing method. Thus, the question arises whether the bitumen microstructure can be used to identify these issues. In this study, microscopic methods, including brightfield, darkfield and fluorescence optical inverse microscopy ...

Abstract (257 words) Objective To determine changes of subchondral bone composition, micro-structure, bone marrow adiposity and micro-vascular perfusion in end-stage osteonecrosis of the femoral head (ONFH) compared to osteoarthritis (OA) using a combined in vivo and ex vivo approach. Design Male patients up to 70 years old referred for total hip replacement surgery for end-stage ONFH were included (n=14). Fifteen patients with OA were controls. ...

The present work reports on the microstructural evolution of a new heat of 24% cold worked austenitic DIN 1.4970 (15-15Ti) nuclear cladding steel subjected to ageing heat treatments of varying duration between 500 and 800 degrees C (by steps of 100 degrees C). The primary aim was studying the finely dispersed Ti-C nanoprecipitate population, which are thought to be beneficial for creep and swelling resistance during service. Their size ...

Formulated Palmitic (PBS) and Lauric-based (LBS) shortenings were studied for their microstructure and hardness. PBS were prepared from ternary blends of palm oil, palm stearin and soybean oil. Meanwhile, LBS were prepared from ternary blends of high oleic sunflower oil, coconut oil and palm stearin. It was shown from isosolid diagram that those formulated shortenings had monotectic behaviour when they were measured within interval of desired ...