The two major problems that have been reported with the use of polymethylmethacrylate (PMMA) cement are thermal necrosis of surrounding bone due to the high heat generation during polymerisation and chemical necrosis due to unreacted monomer release. Computer models have been used to study the temperature and monomer distribution after cementation. In most of these models, however, polymerisati...

Earth-moist concrete mixes are the starting substance for the mass production of concrete products like pipes, slabs, pavement stones and curb stones. The working properties of earth-moist concrete (EMC), caused by its dry consistency, are advantageous. So, in comparison to normal-weight concrete, the consistency of EMC allows for direct stripping of concrete products after filling and vibratin...

CONTEXT Resin luting of all-ceramic restorations results in increased performance; however, the strengthening mechanism and the role of the mechanical properties of the resin are not fully understood. OBJECTIVE The aim of this study was to investigate the effect of filler content on the flexural properties of resin luting agents and thereby selecting an appropriate resin luting cement. MATE...

Hydration of Portland cement in normal conditions is a complex problem. A detailed description the hydration process includes clinker dissolution, diffusion processes, surface phenomena on nuclei new phases, quantitative composition solid matter and growth products, porous structure, humidity depending hardening time water/cement ratio. Thermodynamic modeling based Lothenbach model allows solvi...

The aim of this project was to reduce cement content in concrete mixtures by changing the aggregate grading. For purpose, were made with aggregates having different shapes, textures, and However, workability mix depends on its paste volume, composition, type used. Concrete testing performed, properties including slump, compressive strength, tensile splitting test tested. effect shape evaluated ...