The shrinkage of geopolymer materials is an important parameter to control for several applications. In this topic, study aims investigate the role used precursors (metakaolin and alkaline solution) different additives (sand, normalized sand, wollastonite, glass fibers) on shrinkage. For this, samples were synthesized stored at 20 °C 100% RH. Then, measurements carried out consolidation times. ...

We evaluated the efficacy and biocompatibility of porous apatite-wollastonite glass ceramic (AW-GC) as an intramedullary plug in total hip replacement (THR) for up to two years in 22 adult beagle dogs. Cylindrical porous AW-GC rods (70% porosity, mean pore size 200 microm) were prepared. Four dogs were killed at 1, 3, 6 and 12 months each and six at 24 months after implantation. Radiological ev...

Abstract Crystallization, mechanical properties, and workability are all important for the commercialization optimization of silicate glass compositions. However, inter‐relations these properties as a function composition have received little investigation. Soda‐lime‐silica glasses with Na 2 O‐MgO‐CaO‐Al O 3 ‐SiO compositions relevant to commercial manufacture were experimentally studied multip...

available online at http://meteoritics.org The White Angel: A unique wollastonite-bearing, mass-fractionated refractory inclusion from the Leoville CV3 carbonaceous chondrite Catherine L. V. CAILLET KOMOROWSKI1, 4*, Ernst K. ZINNER2, Kevin D. MCKEEGAN3, Rick HERVIG4, and Peter R. BUSECK4, 5 1Laboratoire d’Etude de la Matière Extraterrestre CNRS UMS2679, Muséum National d’Histoire Naturelle, 61 ...

This paper focuses on examining the pore structure of a cementitious paste made with a calcium silicate (wollastonite) that reacts with carbon dioxide and water to form a hardened solid. The pore structure of the hardened solid has been characterized using vapor sorption and desorption, low-temperature differential scanning calorimetry (LT-DSC), and scanning electron microscopy (SEM). The total...

The heat capacity of a natural monticellite (Ca,.,Mg.,,Fe.~Mn.o,Sio.9903.99) measured between 9.6 and 343 K using intermittent-heating, adiabatic calorimetry yields C$298) and S&s of 123.64 f 0.18 and 109.44 +0.16 J mol-’ K-’ respectively. Extrapolation ofthis entropy value to end-member monticellite results in an S$, = 108.1 + 0.2 J. mol-’ K-‘. High-temperature heat-capacity data were measured...